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19-2532; Rev 2; 6/03
KIT ATION EVALU ABLE AVAIL
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
General Description Features
o 3 3 UCSP, 6-Pin SOT23, and 8-Pin QFN Packages o Preset +1.5V to +3.3V Output (100mV Increments) o SET Pin for Adjustable Output Voltage o 75VRMS LDO Output Voltage Noise (MAX6477-MAX6484) o 2.0% Accuracy Over Temperature o Guaranteed 300mA Output Current o Low Dropout Voltage 55mV at 150mA 114mV at 300mA o 82A Supply Current, 0.1A Shutdown Current o Input Reverse Current, Thermal and Short-Circuit Protection o Microprocessor Reset with Four Timeout Options o Push-Pull or Open-Drain RESET o Manual Reset Input o Remote Feedback Sense
MAX6469-MAX6484
The MAX6469-MAX6484 are low-dropout linear regulators with a fully integrated microprocessor reset circuit. Each is available with preset output voltages from +1.5V to +3.3V in 100mV increments and delivers up to 300mA of load current. These devices consume only 82A of supply current. The low supply current, low dropout voltage, and integrated reset functionality make these devices ideal for battery-powered portable equipment. The MAX6469-MAX6484 include a reset output that indicates when the regulator output drops below standard microprocessor supply tolerances (-7.5% or -12.5% of nominal output voltage). This eliminates the need for an external microprocessor supervisor, while ensuring that supply voltages and clock oscillators have stabilized before processor activity is enabled. Push-pull and opendrain active-low reset outputs are available, with reset timeout periods of 2.5ms, 20ms, 150ms, or 1200ms (min). The MAX6469/MAX6470/MAX6473-MAX6478/MAX6481- MAX6484 also have a shutdown feature that reduces the supply current to 0.1A (typ). The MAX6471-MAX6474/ MAX6479-MAX6482 offer a manual reset input to assert a microprocessor reset while the regulator output is within specification. The MAX6475/MAX6476/MAX6483/ MAX6484 feature a remote feedback sense pin for use with an external NPN transistor for higher-current applications. The MAX6469-MAX6476 are available in 6-pin SOT23 and 8-pin thin QFN packages. The MAX6477- MAX6484 are available in a 3 x 3 chip-scale package (UCSPTM). All devices are specified for operation from -40C to +85C.
Ordering Information
PART MAX6469UT_ _ _D_-T MAX6469TA_ _ _D_* MAX6470UT_ _ _D_-T MAX6470TA_ _ _D_* TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 6 SOT23-6 8 Thin QFN 6 SOT23-6 8 Thin QFN
Applications
Hand-Held Instruments (PDAs, Palmtops) PCMCIA Cards/USB Devices Cellular/Cordless Telephones CD/DVD Drives Notebook Computers Digital Cameras Bluetooth Modules/Wireless LAN
*Future product--contact factory for availability. Note: The first "_ _"are placeholders for the output voltage levels of the devices. Desired output voltages are set by the suffix found in the Output Voltage Suffix Guide (Table 1). The third "_" is a placeholder for the reset threshold accuracy. Desired reset threshold accuracy is set by the suffix found in the Reset Threshold Accuracy Guide (Table 2). The "_" following the D is a placeholder for the reset timeout delay time. Desired reset timeout delay time is set by the suffix found in the Reset Timeout Delay Guide (Table 3). For example, the MAX6481BL30BD4-T has a 3.0V output voltage, 12.5% reset threshold tolerance, and a 1200ms (min) reset timeout delay. Sample stock is generally available on standard versions only (Table 4). Standard versions require a minimum order increment of 2.5k units. Nonstandard versions must be ordered in 10k-unit increments. Contact factory for availability. Ordering Information continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc. Pin Configurations appear at end of data sheet. Typical Operating Circuits appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND, unless otherwise noted.) IN, SHDN, OUT, FB ..................................................-0.3V to +7V MR, SET .......................................................-0.3V to (VIN + 0.3V) RESET (push-pull) ...................................-0.3V to (VOUT + 0.3V) RESET (open drain)..................................................-0.3V to +7V OUT Short Circuit .......................................................Continuous Input/Output Current (all pins except IN and OUT) ............20mA Continuous Power Dissipation (TA = +70C) 3 x 3 UCSP (derate 10.5mW/C above +70C) ............840mW 6-Pin SOT23 (derate 9.1mW/C above +70C).............727mW 8-Pin Thin QFN (derate 24.4mW/C above +70C) ..............................1951mW Operating Temperature Range ..........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: The MAX6477-MAX6484 are constructed using a unique set of packaging techniques that impose a limit on the thermal profile the devices can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection reflow. Pre-heating is required. Hand or wave soldering is not allowed.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = (VOUT + 0.5V) or +2.5V, whichever is greater, COUT = 3.3F, TA = -40C to +85C. Typical specifications are at TA = +25C, unless otherwise noted.) (Note 2)
PARAMETER Input Voltage Range Input Undervoltage Lockout Supply Current (Ground Current) Shutdown Supply Current REGULATOR CIRCUIT Output Current Output Voltage Accuracy (Fixed Output Voltage Operation, Table 1) MAX6469-MAX6476 Output Voltage Accuracy (Fixed Output Voltage Operation, Table 1) MAX6477-MAX6484 Adjustable Output Voltage Range SET Reference Voltage SET Dual ModeTM Threshold SET Input Leakage Current 1mA IOUT 150mA, TA = +25C 1mA IOUT 150mA, TA = -40C to +85C 1mA IOUT 300mA, TA = -40C to +85C 2mA IOUT 100mA, TA = +25C 2mA IOUT 100mA, TA = -40C to +85C 2mA IOUT 300mA, TA = -40C to +85C (Note 3) VSET ISET VSET = 0, +1.2V (Note 3) SYMBOL VIN VUVLO IQ ISHDN VIN falling IOUT = 0 IOUT = 300mA TA = +25C 300 -1.3 -2.3 -2.7 -1.1 -2.0 -2.5 VSET 1.200 CONDITIONS MIN 2.5 2.25 82 96 0.1 TYP MAX 5.5 2.47 136 1 UNITS V V A A mA +1.3 +2.3 +2.7 +1.1 +2.0 +2.5 5.0 1.258 100 V V mV nA % %
1.229 185 20
Dual Mode is a trademark of Maxim Integrated Products, Inc.
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
ELECTRICAL CHARACTERISTICS (continued)
(VIN = (VOUT + 0.5V) or +2.5V, whichever is greater, COUT = 3.3F, TA = -40C to +85C. Typical specifications are at TA = +25C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS VOUT = +3.3V (fixed output operation) VOUT = +3.0V (fixed output operation) VDO VOUT = +2.8V (fixed output operation) VOUT = +2.5V (fixed output operation) Output Current Limit Input Reverse Leakage Current (OUT to IN Leakage Current) Startup Time Response SHDN Input Low Voltage SHDN Input High Voltage SHDN Input Current Thermal-Shutdown Temperature Thermal-Shutdown Hysteresis Line Regulation Load Regulation TSHDN TSHDN VOUT = 1.5V, 2.5V VIN 5.5V, IOUT = 10mA VOUT = 1.5V, VIN = 2.5V, 1mA IOUT 150mA 10Hz to 100kHz, CIN = 0.1F, IOUT = 100mA, VOUT = 1.5V MAX64_ _ _ _ _ _ A VTHOUT MAX64_ _ _ _ _ _ B MAX6469-MAX6476 MAX6477-MAX6484 VIL VIH SHDN = VIN or GND 0.7 x VIN -1 0.1 180 20 0.09 0.2 150 VRMS 75 +1 VIN 2.5V (Note 3) VIN = 4V, VOUT = 5.5V, SHDN deasserted Rising edge of VIN or SHDN to VOUT within specification, RL = 68, SET = GND, IOUT = 10mA IOUT = 50mA IOUT = 150mA IOUT = 300mA IOUT = 50mA IOUT = 150mA IOUT = 300mA IOUT = 50mA IOUT = 150mA IOUT = 300mA IOUT = 50mA IOUT = 150mA IOUT = 300mA 450 0.01 1.5 MIN TYP 23 55 114 25 61 114 26 65 137 30 75 158 MAX 32 90 180 40 100 190 50 110 210 60 150 250 UNITS
MAX6469-MAX6484
Dropout Voltage (Notes 3, 4)
mV
mA A
20 0.3 x VIN
s V V A C C %/V %
Output Voltage Noise
RESET CIRCUIT VOUT Reset Threshold (VFB for MAX6475/MAX6476/ MAX6483/MAX6484) (Note 5) VOUT to Reset Delay (VFB for MAX6475/MAX6476/ MAX6483/MAX6484) D1 Reset Timeout Period (Note 6) tRP D2 D3 D4 2.5 20 150 1200 90 85 92.5 87.5 35 3.75 30 225 1800 5.0 40 300 2400 ms 95 90 %VOUT
s
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
ELECTRICAL CHARACTERISTICS (continued)
(VIN = (VOUT + 0.5V) or +2.5V, whichever is greater, COUT = 3.3F, TA = -40C to +85C. Typical specifications are at TA = +25C, unless otherwise noted.) (Note 2)
PARAMETER MR Input Low Voltage MR Input High Voltage MR Minimum Input Pulse MR Glitch Rejection MR to Reset Delay MR Pullup Resistance RESET Output Voltage (Open Drain) Open-Drain Reset Output Leakage Current VOL ILKG VOL RESET Output Voltage Push-Pull VOH MR to OUT VOUT 1.0V, ISINK = 50A, RESET asserted VOUT 1.5V, ISINK = 3.2mA, RESET asserted (Note 3) VOUT 1.0V, ISINK = 50A, RESET asserted VOUT 1.5V, ISINK = 3.2mA, RESET asserted VOUT 2.0V, ISOURCE = 500A, RESET deasserted 0.8 x VOUT 25 SYMBOL VIL VIH (Note 3) 0.7 x VOUT 1 120 200 40 70 0.3 0.4 1 0.3 0.4 V CONDITIONS MIN TYP MAX 0.3 x VOUT UNITS V V s ns ns k V A
Note 2: Note 3: Note 4: Note 5: Note 6:
All devices are 100% production tested at +25C and are guaranteed by correlation for TA = TMIN to TMAX. Guaranteed by design. Dropout voltage is defined as (VIN - VOUT) when VOUT is 2% below the value of VOUT for VIN = VOUT(NOM) + 1V. MAX6473/MAX6474/MAX6481/MAX6482 are guaranteed by design for VOUT < 2.5V. Select the reset timeout period using the Reset Timeout Delay Guide (Table 3). Insert the appropriate suffix in the part number when ordering.
Typical Operating Characteristics
(VIN = 5V, VOUT = 3.3V, COUT = 3.3F, TA = +25C, unless otherwise noted.)
GROUND CURRENT vs. INPUT VOLTAGE (NO LOAD)
MAX6469 toc01
GROUND CURRENT vs. INPUT VOLTAGE (300mA LOAD)
MAX6469 toc02
MAXIMUM TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE
MAX6469 toc03
120 100 GROUND CURRENT (A) 80 60 40 20 0 0 1 2 3 4 5 6 INPUT VOLTAGE (V) +85C +25C -40C
120 100 GROUND CURRENT (A) +85C 80 60 40 20 0 0 1 2 3 4 5 6 INPUT VOLTAGE (V) +25C -40C
150 125 PULSE DURATION (s) 100 75 50 25 0 1 10 RESET THRESHOLD OVERDRIVE (mV)
RESET ASSERTS ABOVE THIS LINE
100
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
Typical Operating Characteristics (continued)
(VIN = 5V, VOUT = 3.3V, COUT = 3.3F, TA = +25C, unless otherwise noted.)
REGION OF STABLE COUT ESR vs. LOAD CURRENT
MAX6469 toc05
MAX6469 toc06
MAX6469-MAX6484
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX6469 toc04
PSRR vs. FREQUENCY
0 -10 -20 PSRR (dB) VOUT = 3.3V COUT = 3.3F ILOAD = 30mA 5
125 VOUT = 3.3V COUT = 3.3F 100 DROPOUT VOLTAGE (mV)
4 COUT ESR ()
75
3 COUT = 4.7F 2 COUT = 3.3F
-30 -40
50
25
-50 -60 0 50 100 150 200 250 300 0.01 0.1 1 10 100 1000 LOAD CURRENT (mA) FREQUENCY (kHz)
1 STABLE REGION
0
0 0 50 100 150 200 250 300 LOAD CURRENT (mA)
OUTPUT NOISE
MAX6469 toc07
OUTPUT NOISE vs. FREQUENCY
VIN = 2.5V VOUT = 1.5V IOUT = 100mA
MAX6469 toc08
SHUTDOWN RESPONSE
MAX6469 toc09
VIN = 4.5V VOUT = 3.3V ILOAD = 100mA
100
80
100V/div
VRMS (V)
60
VSHDN 5V/div
40 VOUT 2V/div ILOAD = 50mA
20
0 500s/div 10 100 1k FREQUENCY (Hz) 10k 100k 20ms/div
STARTUP RESPONSE
MAX6469 toc10
LOAD-TRANSIENT RESPONSE
MAX6469 toc11
LOAD-TRANSIENT RESPONSE NEAR DROPOUT
MAX6469 toc12
VIN 2V/div
VIN = 5V VOUT = 3.3V ILOAD = 100mA
VOUT 2V/div
VOUT 20mV/div
VOUT 5mV/div
10s/div
100s/div
10s/div
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Typical Operating Characteristics (continued)
(VIN = 5V, VOUT = 3.3V, COUT = 3.3F, TA = +25C, unless otherwise noted.)
LINE TRANSIENT RESPONSE
MAX6469 toc13
RESET DELAY RESPONSE
MAX6469 toc14
RESET RESPONSE TO MR
MAX6469 toc15
5V 4.5V
VIN 500mV/div VIN 1V TO 4V 2V/div MR 2V/div
VOUT 20mV/div AC-COUPLED RESET 2V/div VOUT = 3.3V ILOAD = 10mA 100s/div 200ms/div 200ns/div RESET 2V/div
RESET RESPONSE TO VIN RISING
MAX6469 toc16
NORMALIZED OUTPUT VOLTAGE vs. TEMPERATURE
NORMALIZED TO +25C
MAX6469 toc17
1.012
RESET 2V/div
NORMALIZED OUTPUT VOLTAGE
1.006 ILOAD = 10mA 1.000 ILOAD = 300mA
VOUT 2V/div VIN 5V/div 200ms/div
0.994
ILOAD = 150mA
0.988 -40 -15 10 35 60 85 TEMPERATURE (C)
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
MAX6469/MAX6470/MAX6477/MAX6478 Pin Description
PIN MAX6469/MAX6470 SOT23 1 2 3 QFN 1, 2 3 4 BUMP MAX6477/MAX6478 UCSP A1 A2 A3 IN GND SHDN Regulator Input. Bypass IN to GND with a 0.1F capacitor. Ground. This pin also functions as a heatsink. Solder to large pads or the circuit-board ground plane to maximize thermal dissipation. Active-Low Shutdown Input. Connect SHDN to VIN for normal operation. Active-Low Reset Output. RESET remains low while VOUT is below the reset threshold. RESET remains low for the duration of the reset timeout period after the reset conditions are terminated. RESET is available in open-drain and push-pull configurations. Feedback Input for Externally Setting the Output Voltage. Connect SET to GND to select the preset output voltage. Connect SET to an external resistor-divider network for adjustable output operation. Regulator Output. Bypass OUT to GND with a minimum 3.3F low-ESR capacitor. NAME FUNCTION
MAX6469-MAX6484
4
5
C3
RESET
5
6
C2
SET
6
7, 8
C1
OUT
MAX6471/MAX6472/MAX6479/MAX6480 Pin Description
PIN MAX6471/MAX6472 SOT23 1 2 QFN 1, 2 3 BUMP MAX6479/MAX6480 UCSP A1 A2 IN GND Regulator Input. Bypass IN to GND with a 0.1F capacitor. Ground. This pin also functions as a heatsink. Solder to large pads or the circuit-board ground plane to maximize thermal dissipation. Active-Low Manual Reset Input. The reset output is asserted while MR is pulled low and remains asserted for the duration of the reset timeout period after MR transitions from low to high. Leave MR unconnected or connect to VOUT if not used. MR has an internal pullup resistor of 40k (typ) to VOUT. Active-Low Reset Output. RESET remains low while VOUT is below the reset threshold or while MR is held low. RESET remains low for the duration of the reset timeout period after the reset conditions are terminated. RESET is available in open-drain and push-pull configurations. Feedback Input for Externally Setting the Output Voltage. Connect SET to GND to select the preset output voltage. Connect SET to an external resistor-divider network for adjustable output operation. Regulator Output. Bypass OUT to GND with a minimum 3.3F low-ESR capacitor. NAME FUNCTION
3
4
A3
MR
4
5
C3
RESET
5
6
C2
SET
6
7, 8
C1
OUT
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
MAX6473/MAX6474/MAX6481/MAX6482 Pin Description
PIN MAX6473/MAX6474 SOT23 1 2 3 QFN 1, 2 3 4 BUMP MAX6481/MAX6482 UCSP A1 A2 A3 IN GND SHDN Regulator Input. Bypass IN to GND with a 0.1F capacitor. Ground. This pin also functions as a heatsink. Solder to large pads or the circuit-board ground plane to maximize thermal dissipation. Active-Low Shutdown Input. Connect SHDN to VIN for normal operation. Active-Low Reset Output. RESET remains low while VOUT is below the reset threshold or while MR is held low. RESET remains low for the duration of the reset timeout period after the reset conditions are terminated. RESET is available in open-drain and push-pull configurations. Active-Low Manual Reset Input. The reset output is asserted while MR is pulled low and remains asserted for the duration of the reset timeout period after MR transitions from low to high. Leave MR unconnected or connect to VOUT if not used. MR has an internal pullup resistor of 40k (typ) to VOUT. Regulator Output. Bypass OUT to GND with a minimum 3.3F (min) low-ESR capacitor. NAME FUNCTION
4
5
C3
RESET
5
6
C2
MR
6
7, 8
C1
OUT
MAX6475/MAX6476/MAX6483/MAX6484 Pin Description
PIN MAX6475/MAX6476 SOT23 1 2 3 QFN 1, 2 3 4 BUMP MAX6483/MAX6484 UCSP A1 A2 A3 IN GND SHDN Regulator Input. Bypass IN to GND with a 0.1F capacitor. Ground. This pin also functions as a heatsink. Solder to large pads or the circuit-board ground plane to maximize thermal dissipation. Active-Low Shutdown Input. Connect SHDN to VIN for normal operation. Active-Low Reset Output. RESET remains low while FB is below the reset threshold. RESET remains low for the duration of the reset timeout period after the reset conditions are terminated. RESET is available in open-drain and push-pull configurations. Feedback Input for Linear Regulator Controller or Remote Sense Applications. Connect FB to the external load (VCC) to obtain the fixed output voltage. Regulator Output. Bypass OUT to GND with a minimum 3.3F low-ESR capacitor. NAME FUNCTION
4
5
C3
RESET
5
6
C2
FB
6
7, 8
C1
OUT
8
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
Detailed Description
The MAX6469-MAX6484 are ultra-low, quiescent current, low-dropout linear regulators with an integrated microprocessor reset circuit. These devices guarantee 300mA (min) drive capabilities and are available with preset output voltages in 100mV increments between +1.5V and +3.3V. The internal reset circuit monitors the regulator output voltage and asserts the reset output when the regulator output is below the microprocessor supply tolerance.
MAX6469-MAX6484
2.5V TO 5.5V IN OUT
MAX6469-MAX6472 MAX6477-MAX6480
(MR) MANUAL RESET GND SET
R1
COUT R2
Regulator
The regulator core operates with +2.5V to +5.5V input voltage range. The output voltage is offered in 100mV increments between +1.5V and +3.3V (contact factory for other output voltage options). The MAX6469- MAX6472/MAX6477-MAX6480 offer an adjustable output voltage implemented with an external resistordivider network between OUT, SET, and GND (Figure 1). SET must be connected to either GND for fixed VOUT or to an external divider for adjustable VOUT. The MAX6469-MAX6472/MAX6477-MAX6480 automatically determine the feedback path depending on the connection of SET. The Typical Operating Circuit shows a typical connection for the MAX6469. OUT is an internally regulated low-dropout (LDO) linear regulator that powers a microprocessor.
( ) ARE FOR MAX6471/MAX6472/MAX6479/MAX6480 ONLY
Figure 1. Adjustable Output Voltage Configuration
the reset threshold. RESET asserts when MR is pulled low (MAX6471-MAX6474/MAX6479-MAX6482). RESET asserts when SHDN is pulled low (MAX6469/ MAX6470/MAX6473-MAX6478/MAX6481-MAX6484). Shutdown (MAX6469/MAX6470/MAX6473-MAX6478/MAX6481- MAX6484 only) SHDN allows the regulator to shut down, thereby reducing the total IIN consumption of the device. SHDN provides a digitally controlled active-low shutdown. In shutdown mode, the pass transistor, control circuit, and reference turn off to reduce the supply current to below 0.1A. Connect SHDN to IN for normal operation. Manual Reset Input (MAX6471-MAX6474/MAX6479-MAX6482 only) Many P-based products require manual reset capability, allowing the operator, a test technician, or external logic circuitry to initiate a reset. A logic low on MR asserts reset while the regulator output voltage is still within tolerance. Reset remains asserted while MR is low and for the reset timeout period (tRP) after MR returns high. The MR input has an internal pullup of 40k (typ) to OUT. MR can be driven with TTL/CMOS logic levels or with open-drain/collector outputs. Connect a normally open switch from MR to GND to create a manual reset function; external debounce circuitry is not required. If MR is driven from long cables or the device is used in a noisy environment, connect a 0.1F capacitor from MR to GND to provide additional noise immunity. Feedback Input (MAX6475/MAX6476/MAX6483/MAX6484 only) The feedback input (FB) connects to an internal resistordivider network (Functional Diagram). FB is not internally connected to VOUT, and as a result can be used to
9
Reset Circuit
The reset supervisor circuit is fully integrated in the MAX6469-MAX6484 and uses the same reference voltage as the regulator. Two supply tolerance reset thresholds, -7.5% and -12.5%, are provided for each type of device. -7.5% Reset: Reset does not assert until the regulator output voltage is at least -5% out of tolerance and always asserts before the regulator output voltage is -10% out of tolerance. -12.5% Reset: Reset does not assert until the regulator output voltage is at least -10% out of tolerance and always asserts before the regulator output voltage is -15% out of tolerance.
RESET Output A P's reset input starts the P in a known state. The MAX6469-MAX6484 P supervisory circuits assert RESET during power-up, power-down, and brownout conditions. RESET asserts when the input voltage is below the undervoltage lockout threshold. RESET asserts when VOUT is below the reset threshold and remains asserted for at least the minimum selected reset timeout period (tRP, Table 3) after VIN rises above the undervoltage lockout threshold and VOUT rises above
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
remotely sense the output voltage of the device. Using FB with an external NPN transistor, the current drive capability can be increased according to the following equation (Figure 2): IOUT(TOTAL) = IOUT (+1) The external NPN pass transistor must meet specifications for current gain, power dissipation, and collector current. The beta influences the maximum output current the circuit can deliver. The largest guaranteed output current is given by ILOAD (max) = 300mA x beta (min). The transistor's rated power dissipation must exceed the actual power dissipated in the transistor. The power dissipated (PD) equals the maximum load current (ILOAD (max)) times the maximum input-to-output voltage differential: PD = ILOAD (max) x (VIN (max) V OUT ). The rated transistor collector current must exceed the maximum load current. OUT-to-GND current through the LDO is 40A (typ). The regulator output can be held up with an external super capacitor or backup battery at OUT until the IN battery is replaced. The RESET output is asserted while the IN battery is removed to place the system in a low-power mode. Volatile memory content is maintained until the super capacitor or battery voltage drops below RAM standby specifications. RESET deasserts when the IN battery has been replaced and OUT exceeds the desired reset threshold. For nonrechargeable backup battery applications, place a reverse diode between OUT and the backup battery (to prevent battery charging). The external diode does not affect the regulator's dropout voltage because it is not between the LDO output and the processor/memory Vcc supply. The diode can be replaced with a current-limiting resistor for rechargeable backup battery applications.
Current Limit
The MAX6469-MAX6484 include an internal currentlimit circuit that monitors and controls the pass transistor's gate voltage, limiting the output current to 450mA (min). The output can be shorted to ground indefinitely without damaging the part.
Reverse Leakage Protection
Reverse OUT to IN Current
An internal circuit monitors the MAX6469-MAX6484 input and output voltages. When the output voltage is greater than the input voltage, the internal IN-to-OUT pass transistor and parasitic diode turn off. An external voltage applied to OUT does not reverse charge a battery or power source applied to IN (the leakage path from OUT to IN is 0.01A typ). When the output voltage exceeds the input voltage, OUT powers the device and shutdown must be logic high (greater than 0.7 VOUT). RESET asserts until IN exceeds OUT and OUT is above the specified VTHOUT threshold (based on the selected or adjusted regulator OUT nominal voltage).
Thermal Shutdown
When the junction temperature (TJ) exceeds +180C (typ), the thermal sensor signals the shutdown logic, turning off the pass transistor and allowing the IC to
REMOVABLE LITHIUM ION OR 3-CELL ALKALINE IN OUT
Reverse OUT to Ground Current
The MAX6469-MAX6484 maintain a low OUT-to-GND reverse-current flow when the IN power source is removed. When IN floats (input battery removed) and SHDN is pulled up to VOUT (by an external diode), the
5.0V
MAX6469- MAX6484
SHDN
3.3F 3.0V LITHIUM
P
MEMORY
IN OUT
1A TOTAL CURRENT
VCC = 3.3V
REMOVABLE LITHIUM ION OR 3-CELL ALKALINE IN
OUT
MAX6475/MAX6476 MAX6483/MAX6484
FB GND RESET
330
3.3F
0.1F
RPULLUP P
MAX6469- MAX6484
SHDN
3.3F SUPERCAP P MEMORY
Figure 2. High-Current, External Transistor Application 10
Figure 3. Battery Backup
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
cool. The thermal sensor turns the pass transistor on again after the IC's junction temperature cools by 20C, resulting in a pulsed output during continuous thermal overload conditions. Thermal overload protection is designed to protect the MAX6469-MAX6484 in the event of fault conditions. For continuous operation, do not exceed the absolute maximum junction temperature rating of TJMAX = +150C. Operating Region and Power Dissipation The MAX6469-MAX6484's maximum power dissipation depends on the thermal resistance of the case and circuit board, the temperature difference between the die junction and the ambient air, and the rate of airflow. The power dissipation across the device is: P = IOUT (VIN - VOUT) The maximum power dissipation is: PMAX = (TJ - TA) / (OJB + OBA) where TJ - TA is the temperature difference between the die junction and the surrounding air, OJB (or OJC) is the thermal resistance of the package, and OBA is the thermal resistance through the PC board, copper traces, and other materials to the surrounding air. The MAX6469-MAX6476 QFN package OJC = 41C/W, and the MAX6469-MAX6476 SOT package OJC = 110C/W. The MAX6469-MAX6484's ground pin (GND) performs the dual function of providing an electrical connection to the system ground and channeling heat away. Connect GND to the system ground using a large pad or ground plane. For continuous operation, do not exceed the absolute maximum junction temperature rating of TJMAX = +150C. resistor values greater than 100k. In preset voltage mode, the impedance between SET and ground should always be less than 50k. In most applications, connect SET directly to ground.
MAX6469-MAX6484
Low-Noise UCSP Output
MAX6477-MAX6484 UCSP products include internal filtering to yield low output noise without an additional external bypass capacitor. The devices yield 75VRMS (typ) output noise (for VOUT = 3.0V) and 150VRMS (for V OUT = 3.3V). This low-noise feature makes the MAX6477-MAX6484 ideal for audio applications.
Capacitor Selection and Regulator Stability
For stable operation over the full temperature range and with load currents up to 300mA, use a 3.3F (min) ceramic output capacitor with an ESR <0.2. To reduce noise and improve load transient response, stability, and power-supply rejection, use large output capacitor values such as 10F. Note that some ceramic capacitors exhibit large capacitance and ESR variation with temperature. With capacitor dielectrics such as Z5U and Y5V, use 4.7F or more to ensure stability over temperature. With X7R or X5R capacitor dielectrics, 3.3F should be sufficient at all operating temperatures. Higher ESR capacitors require more capacitance to maintain stability. A graph of the Region of Stable ESR vs. Load Current is shown in the Typical Operating Characteristics. To improve power-supply rejection and transient response, use a 1F capacitor between IN and GND. The MAX6469-MAX6484 remain stable with purely resistive loads or current loads up to 300mA.
Applications Information
Output Voltage Selection
The MAX6469-MAX6484 feature dual-mode operation: they operate in either a preset output voltage mode or an adjustable mode. In preset voltage mode, internal feedback resistors set the MAX6469-MAX6484's output from +1.5V to +3.3V (Table 1). Select this mode by connecting SET to ground (MAX6469-MAX6472/ MAX6477-MAX6480). In adjustable mode, select an output between 1.25V and 5.5V using two external resistors connected as a voltage-divider to SET (Figure 1). The output voltage is set by the following equation: VOUT = VSET (1 + R1 / R2) where VSET = 1.23V. To simplify resistor selection: R1 = R2 (VOUT / VSET - 1) Choose R2 = 50k to maintain stability, accuracy and high-frequency power-supply rejection. Avoid selecting
Reset Transient Immunity
The reset circuit is relatively immune to short-duration, falling V OUT transients. The Typical Operating Characteristics section shows a graph of the Maximum Transient Duration vs. Reset Threshold Overdrive for which reset is not asserted. The graph was produced using falling VOUT transients starting at VOUT and ending below the reset threshold by the magnitude indicated (reset threshold overdrive). The graph shows the maximum pulse width that a falling VOUT transient can typically have without triggering a reset pulse. As the amplitude of the transient increases (i.e., goes further below the reset threshold), the maximum allowable pulse width decreases. Typically, a VOUT transient that goes only 10mV below the reset threshold and lasts for 75s does not trigger a reset pulse.
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11
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Power Dissipation Consideration
For the SOT23 package, any pin except the SET pin can be used as a heatsink. If the SET pin is used as a heatsink, excessive parasitic capacitance can affect stability. For the QFN package, the exposed metal pad on the back side of a package connects to GND of the chip. This metal pad can be used as a heatsink.
UCSP Reliability
The chip-scale package (UCSP) represents a unique packaging form factor that might not perform equally to a packaged product through traditional mechanical reliability tests. CSP reliability is integrally linked to the user's assembly methods, circuit-board material, and usage environment. The user should closely review these areas when considering a CSP package. Performance through operating life test and moisture resistance remains uncompromised, because it is primarily determined by the wafer-fabrication process. Mechanical stress performance is a greater consideration for a CSP package. CSPs are attached through direct solder contact to the user's PC board, forgoing the inherent stress relief of a packaged product's lead frame. Solder-joint contact integrity must be considered. Information on Maxim's qualification plan, test data, and recommendations are detailed in the UCSP application note on Maxim's website at www.maxim-ic.com.
UCSP Consideration
For general UCSP package information and PC layout considerations, refer to Maxim Application Note: WaferLevel Chip-Scale Package.
Table 1. Output Voltage Suffix Guide
SUFFIX 15 16 17 18 19 20 21 22 23 24 25 26 27 28 285 29 30 31 32 33 OUTPUT VOLTAGE (V) 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.85 2.9 3.0 3.1 3.2 3.3
Table 2. Reset Threshold Accuracy Guide
SUFFIX A B VOUT RESET TOLERANCE (%) -7.5 -12.5
Table 3. Reset Timeout Delay Guide
SUFFIX D1 D2 D3 D4 MINIMUM RESET TIMEOUT PERIOD (ms) 2.5 20 150 1200
Note: Factory-trimmed custom output voltages may be available; contact factory for availability. 12 ______________________________________________________________________________________
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Table 4. Standard Versions
DEVICE MAX6469TA15BD3 MAX6469TA18AD3 MAX6469TA25BD3 MAX6469TA28AD3 MAX6469TA30BD3 MAX6469TA33AD3 MAX6469UT15BD3 MAX6469UT18AD3 MAX6469UT25BD3 MAX6469UT28AD3 MAX6469UT285AD3 MAX6469UT285BD3 MAX6469UT30BD3 MAX6469UT33AD3 MAX6470TA15BD3 MAX6470TA18AD3 MAX6470TA25BD3 MAX6470TA28AD3 MAX6470UT285AD3 MAX6470UT285BD3 MAX6470TA30BD3 MAX6470TA33AD3 MAX6470UT15BD3 MAX6470UT18AD3 MAX6470UT25BD3 MAX6470UT28AD3 MAX6470UT30BD3 MAX6470UT33AD3 MAX6471TA15AD3 MAX6471TA18BD3 MAX6471TA25AD3 MAX6471TA28BD3 MAX6471TA30AD3 MAX6471TA33BD3 MAX6471UT15AD3 MAX6471UT18BD3 MAX6471UT25AD3 TOP MARK ADO ADP ADQ ACT ADR ADS ABKS ABKT ABKU ABFF ABMZ ABNA ABKV ABKW ADT ADU ADV ADW ABNB ABNC ADY ACU ABKX ABKY ABKZ ABLA ABLB ABLC ADZ AEA AEB AEC AED AEE ABLD ABLE ABLF DEVICE MAX6471UT28BD3 MAX6471UT30AD3 MAX6471UT33BD3 MAX6472TA15AD3 MAX6472TA18BD3 MAX6472TA25AD3 MAX6472TA28BD3 MAX6472TA30AD3 MAX6472TA33BD3 MAX6472UT15AD3 MAX6472UT18BD3 MAX6472UT25AD3 MAX6472UT28BD3 MAX6472UT30AD3 MAX6472UT33BD3 MAX6473TA15AD3 MAX6473TA18BD3 MAX6473TA25AD3 MAX6473TA28BD3 MAX6473TA30AD3 MAX6473TA33BD3 MAX6473UT15AD3 MAX6473UT18BD3 MAX6473UT25AD3 MAX6473UT28BD3 MAX6473UT30AD3 MAX6473UT33BD3 MAX6474TA15AD3 MAX6474TA18BD3 MAX6474TA25AD3 TOP MARK ABLG ABLH ABLI AEF ACW AEG AEH AEI AEJ ABLJ ABFI ABLK ABLL ABLM ABLN AEK AEL AEM AEN AEO AEP ABLO ABLP ABLQ ABLR ABLS ABLT AEQ AER AES
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13
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Table 4. Standard Versions (continued)
DEVICE MAX6474TA28BD3 MAX6474TA30AD3 MAX6474TA33BD3 MAX6474UT15AD3 MAX6474UT18BD3 MAX6474UT25AD3 MAX6474UT28BD3 MAX6474UT30AD3 MAX6474UT33BD3 MAX6475TA15BD3 MAX6475TA18AD3 MAX6475TA25BD3 MAX6475TA28AD3 MAX6475TA30BD3 MAX6475TA33AD3 MAX6475UT15BD3 MAX6475UT18AD3 MAX6475UT25BD3 MAX6475UT28AD3 MAX6475UT30BD3 MAX6475UT33AD3 MAX6476TA15BD3 MAX6476TA18AD3 MAX6476TA25BD3 MAX6476TA28AD3 MAX6476TA30BD3 MAX6476TA33AD3 MAX6476UT15BD3 MAX6476UT18AD3 MAX6476UT25BD3 MAX6476UT28AD3 MAX6476UT30BD3 MAX6476UT33AD3 MAX6477BL15BD3 MAX6477BL18AD3 MAX6477BL25BD3 MAX6477BL28AD3 MAX6477BL30BD3 MAX6477BL33AD3 MAX6478BL15BD3 MAX6478BL18AD3 MAX6478BL25BD3 TOP MARK AET AEU AEV ABLU ABLV ABLW ABLX ABLY ABLZ AEW AEX AEY AEZ AFA ACZ ABMA ABMB ABMC ABMD ABME ABFL AFB AFC AFD AFE AEF AFG ABMF ABMG ABMH ABMI ABMJ ABMK ABW ABG ABX ABY ABZ ACA ACB ACC ACD DEVICE MAX6478BL28AD3 MAX6478BL30BD3 MAX6478BL33AD3 MAX6479BL15AD3 MAX6479BL18BD3 MAX6479BL25AD3 MAX6479BL28BD3 MAX6479BL30AD3 MAX6479BL33BD3 MAX6480BL15BD3 MAX6480BL18AD3 MAX6480BL25BD3 MAX6480BL28AD3 MAX6480BL30BD3 MAX6480BL33AD3 MAX6481BL15BD3 MAX6481BL18AD3 MAX6481BL25BD3 MAX6481BL28AD3 MAX6481BL30BD3 MAX6481BL33AD3 MAX6482BL15BD3 MAX6482BL18AD3 MAX6482BL25BD3 MAX6482BL28AD3 MAX6482BL30BD3 MAX6482BL33AD3 MAX6483BL15BD3 MAX6483BL18AD3 MAX6483BL25BD3 MAX6483BL28AD3 MAX6483BL30BD3 MAX6483BL33AD3 MAX6484BL15BD3 MAX6484BL18AD3 MAX6484BL25BD3 MAX6484BL28AD3 MAX6484BL30BD3 MAX6484BL33AD3 TOP MARK ACE ACF ACG ACH ACI ACJ ACK ACL ACM ACN ACO ACP ACQ ACR ABJ ACS ACT ACU ACV ACW ACX ACY ACZ ADA ADB ADC ADD ADE ADF ADG ADH ADI ADJ ADK ADL ADM ADN ADO ADP
Sample stock is generally available on standard versions only. Standard versions require a minimum order increment of 2.5k units. Nonstandard versions must be ordered in 10k-unit increments. Contact factory for availability.
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
Pin Configurations
TOP VIEW
IN 1 6 OUT IN IN 5 SET GND 1 2 3 8 OUT IN 1 6 OUT
MAX6469-MAX6484
GND 2
MAX6469 MAX6470
MAX6469 7 OUT MAX6470
6 5 SET RESET
GND 2
MAX6471 MAX6472
5
SET
SHDN 3
4
RESET
SHDN 4
MR 3
4
RESET
SOT23-6
THIN QFN
SOT23-6
IN IN GND
1 2 3
8
OUT
IN 1
6
OUT
IN IN
1 2 3
8
OUT OUT MR RESET
MAX6471 7 OUT MAX6472
6 5 SET RESET
GND 2
MAX6473 MAX6474
5
MR
MAX6473 MAX6474
7 6 5
GND
MR 4
SHDN 3
4
RESET
SHDN 4
THIN QFN
SOT23-6
THIN QFN
IN 1
6
OUT
IN IN
1 2 3
8
OUT OUT FB RESET
GND 2
MAX6475 MAX6476
5
FB
MAX6475 MAX6476
7 6 5
GND
SHDN 3
4
RESET
SHDN 4
SOT23-6 UCSP DEVICES SHOWN AS MOUNTED ON PC BOARD. BALL SOLDERED DOWN.
OUT C1 A1 IN
THIN QFN
OUT
C1
A1
IN
SET
C2 MAX6478
MAX6477
A2
GND
MR
C2 MAX6482
MAX6481
A2
GND
RESET
C3
A3
SHDN
RESET
C3
A3
SHDN
3 x 3 UCSP
3 x 3 UCSP
OUT
C1
A1
IN
OUT
C1
A1
IN
SET
C2 MAX6480
MAX6479
A2
GND
FB
C2 MAX6484
MAX6483
A2
GND
RESET
C3
A3
MR
RESET
C3
A3
SHDN
3 x 3 UCSP
3 x 3 UCSP
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15
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Functional Diagrams
THERMAL SENSOR OUT
IN SHDN* REVERSE LEAKAGE PROTECTION THERMAL SENSOR OUT
IN SHDN
REVERSE LEAKAGE PROTECTION
MOS DRIVER WITH CURRENT LIMIT
MOS DRIVER WITH CURRENT LIMIT FB ERROR AMP
ERROR AMP SET** FEEDBACK-MODE COMPARATOR
1.23V
1.23V
MAX6475/MAX6476 MAX6483/MAX6484
185mV
RESET TIMEOUT
OUTPUT STAGE
RESET
RESET TIMEOUT
OUTPUT STAGE
RESET
RESET COMPARATOR
MAX6469-MAX6474 MAX6477-MAX6482
MR***
RESET COMPARATOR
GND *MAX6469/MAX6470/MAX6473-MAX6478/MAX6481-MAX6484 **MAX6469-MAX6472/MAX6477-MAX6480 ***MAX6471-MAX6474/MAX6479-MAX6482
GND
Typical Operating Circuit
2.5V TO 5.5V
Chip Information
TRANSISTOR COUNT: 1041 PROCESS: BiCMOS
IN SHDN OUT 3.3F VCC
MAX6469/MAX6470 MAX6477/MAX6478
SET GND RESET
P RESET GND
16
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
Ordering Information (continued)
PART MAX6471UT_ _ _D_-T MAX6471TA_ _ _D_* MAX6472UT_ _ _D_-T MAX6472TA_ _ _D_* MAX6473UT_ _ _D_-T MAX6473TA_ _ _D_* MAX6474UT_ _ _D_-T MAX6474TA_ _ _D_* MAX6475UT_ _ _D_-T MAX6475TA_ _ _D_* MAX6476UT_ _ _D_-T MAX6476TA_ _ _D_* MAX6477BL_ _ _D_-T MAX6478BL_ _ _D_-T MAX6479BL_ _ _D_-T MAX6480BL_ _ _D_-T MAX6481BL_ _ _D_-T MAX6482BL_ _ _D_-T MAX6483BL_ _ _D_-T MAX6484BL_ _ _D_-T TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 6 SOT23-6 8 Thin QFN 6 SOT23-6 8 Thin QFN 6 SOT23-6 8 Thin QFN 6 SOT23-6 8 Thin QFN 6 SOT23-6 8 Thin QFN 6 SOT23-6 8 Thin QFN 6 UCSP 6 UCSP 6 UCSP 6 UCSP 6 UCSP 6 UCSP 6 UCSP 6 UCSP
MAX6469-MAX6484
*Future product--contact factory for availability. Note: The first "_ _"are placeholders for the output voltage levels of the devices. Desired output voltages are set by the suffix found in the Output Voltage Suffix Guide (Table 1). The third "_" is a placeholder for the reset threshold accuracy. Desired reset threshold accuracy is set by the suffix found in the Reset Threshold Accuracy Guide (Table 2). The "_" following the D is a placeholder for the reset timeout delay time. Desired reset timeout delay time is set by the suffix found in the Reset Timeout Delay Guide (Table 3). For example, the MAX6481BL30BD4-T has a 3.0V output voltage, 12.5% reset threshold tolerance, and a 1200ms (min) reset timeout delay. Sample stock is generally available on standard versions only (Table 4). Standard versions require a minimum order increment of 2.5k units. Nonstandard versions must be ordered in 10k-unit increments. Contact factory for availability.
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17
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Selector Guide
PART MAX6469 MAX6470 MAX6471 MAX6472 MAX6473 MAX6474 MAX6475 MAX6476 MAX6477 MAX6478 MAX6479 MAX6480 MAX6481 MAX6482 MAX6483 MAX6484 SET -- -- -- -- -- -- -- -- SHDN -- -- -- -- MR -- -- -- -- -- -- -- -- FB -- -- -- -- -- -- -- -- -- -- -- -- PUSH-PULL RESET -- -- -- -- -- -- -- -- OPEN-DRAIN RESET -- -- -- -- -- -- -- -- PACKAGE SOT23-6/8-QFN SOT23-6/8-QFN SOT23-6/8-QFN SOT23-6/8-QFN SOT23-6/8-QFN SOT23-6/8-QFN SOT23-6/8-QFN SOT23-6/8-QFN 3 x 3 UCSP B9-3 3 x 3 UCSP B9-3 3 x 3 UCSP B9-3 3 x 3 UCSP B9-3 3 x 3 UCSP B9-3 3 x 3 UCSP B9-3 3 x 3 UCSP B9-3 3 x 3 UCSP B9-3
18
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300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX6469-MAX6484
PACKAGE OUTLINE, SOT-23, 6L
21-0058
F
1
1
6LSOT.EPS
PACKAGE OUTLINE, 3x3 UCSP 21-0093 I
1 1
______________________________________________________________________________________
9LUCSP, 3x3.EPS
19
300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit MAX6469-MAX6484
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
6, 8, &10L, QFN THIN.EPS
1 2
L D A A2
PIN 1 ID
D2
1
N
1
b
PIN 1 INDEX AREA
C0.35 [(N/2)-1] x e REF. e
E
DETAIL A
E2
A1
k
C L
C L
L e A e
L
SEMICONDUCTOR
PROPRIETARY INFORMATION TITLE:
DALLAS
PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
APPROVAL DOCUMENT CONTROL NO. REV.
21-0137
D
COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 2.90 2.90 0.00 0.20 MAX. 0.80 3.10 3.10 0.05 0.40
0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T633-1 T833-1 T1033-1 N 6 8 10 D2 1.50-0.10 1.50-0.10 1.50-0.10 E2 2.30-0.10 2.30-0.10 2.30-0.10 e 0.95 BSC 0.65 BSC 0.50 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEC MO229 / WEED-3 b 0.40-0.05 0.30-0.05 0.25-0.05 [(N/2)-1] x e 1.90 REF 1.95 REF 2.00 REF
SEMICONDUCTOR
PROPRIETARY INFORMATION TITLE:
DALLAS
PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm
APPROVAL DOCUMENT CONTROL NO. REV.
21-0137
D
2 2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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