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19-0663; Rev 2; 11/09
40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO
General Description
The MAX15006/MAX15007 ultra-low quiescent-current linear regulators are ideal for use in automotive and battery-operated systems. These devices operate from an input voltage of 4V to 40V, deliver up to 50mA of output current, and consume only 10A of quiescent current at no load. The internal p-channel pass device keeps the quiescent current low even at full load. The MAX15007 consumes only 3A current when in shutdown. The MAX15006A/MAX15007A have a fixed 3.3V output while the MAX15006B/MAX15007B have a fixed 5V output voltage. The MAX15006C/MAX15007C feature an adjustable output from 1.8V to 10V. The MAX15007 includes an enable input to turn the device on or off. All devices are short-circuit protected and include thermal shutdown. The MAX15006/MAX15007 operate over the -40C to +125C automotive temperature range. These devices are available in space-saving 3mm x 3mm 6-pin TDFN and 8-pin SO thermally enhanced packages.
Features
o Wide Operating Input Voltage Range (4V to 40V) o Guaranteed 50mA Output Current o Low Quiescent Current 10A (No Load) and 90A (Full Load) o Operates Through Cold-Crank Condition o Withstands 45V Load Dump o Low Dropout Voltage of 300mV (MAX15006B/MAX15007B) o Stable Operation with Tiny 2.2F Output Capacitor o Enable Input (MAX15007) o Preset 3.3V and 5.0V Output Voltages o 1.8V to 10V Adjustable Output (MAX15006C/ MAX15007C) o Thermal and Short-Circuit Protection o -40C to +125C Operating Temperature Range o Thermally Enhanced 3mm x 3mm 6-Pin TDFN/ 8-Pin SO Packages
MAX15006/MAX15007
Ordering Information Applications
Automotive Tire-Pressure Monitoring Industrial Telecom Networking
PART MAX15006AASA+ MAX15006AATT+ MAX15006AATT/V+ TEMP RANGE -40C to +125C -40C to +125C PINTOP PACKAGE MARK 8 SO-EP** 6 TDFN-- APE
-40C to +125C 6 TDFN-- -40C to +125C 8 SO-EP** MAX15006BASA+ -- Ordering Information continued at end of data sheet. +Denotes a lead(Pb)-free/RoHS-compliant package. *Future product--contact factory for availability. **EP = Exposed pad. /V Denotes an automotive-qualified part.
Pin Configurations
TOP VIEW
OUT OUT (FB) 6 5 GND 4
MAX15006A MAX15006B MAX15006C
IN 1
+
8 7 6 *EP 5
OUT N.C. (FB) N.C. GND
MAX15006A MAX15006B MAX15006C +
1 IN 2 IN *EP 3 N.C.
N.C. 2 N.C. 3
N.C. 4
SO
*EXPOSED PAD ( ) FOR MAX15006C ONLY.
TDFN
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +45V EN to GND..............................................................-0.3V to +45V OUT, FB to GND.....................................................-0.3V to +12V OUT Short-Circuit Duration ........................................Continuous Maximum Current Into Any Pin (except IN and OUT) ......50mA Continuous Power Dissipation (TA = +70C) 6-Pin TDFN-EP (derate 23.8mW/C above +70C).........1904mW 8-Pin SO-EP (derate 23.3mW/C above +70C)...........1860mW Thermal Resistance (Note 1) JA, 6-Pin TDFN ...........................................................42C/W JC, 6-Pin TDFN ..........................................................8.5C/W JA, 8-Pin SO-EP ..........................................................43C/W JC, 8-Pin SO-EP ............................................................7C/W Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, see www.maxim-ic.com/thermal-tutorial.
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 = 14V, IOUT = 1mA, CIN = 0.1F, COUT = 2.2F, TA = TJ = -40C to +125C, unless otherwise noted. Typical specifications are at TA = +25C.) (Note 2)
PARAMETER Input Voltage Range SYMBOL VIN IOUT = 0 (MAX15006A/B) IOUT = 0 (MAX15006C) IOUT = 0 (MAX15007A/B) IOUT = 0 (MAX15007C) IOUT = 100A (MAX15006A/B) IOUT = 100A (MAX15006C) Ground Current IGND Regulator on, measured at GND IOUT = 100A (MAX15007A/B) IOUT = 100A (MAX15007C) IOUT = 1mA (MAX15006A/B) IOUT = 1mA (MAX15006C) IOUT = 1mA (MAX15007A/B) IOUT = 1mA (MAX15007C) IOUT = 50mA (MAX15006) IOUT = 50mA (MAX15007) Shutdown Supply Current REGULATOR Guaranteed Output Current Output Voltage (Note 3) IOUT VOUT VIN VOUT + VDO MAX15006A/MAX15007A IOUT = 1mA MAX15006B/MAX15007B MAX15006C/MAX15007C IOUT = 5mA, MAX15006B/MAX15007B IOUT = 5mA, MAX15006C/MAX15007C Dropout Voltage (Notes 4, 5) VDO IOUT = 50mA, MAX15006B/MAX15007B IOUT = 50mA, MAX15006C/MAX15007C IOUT = 50mA, MAX15006A/MAX15007A 50 3.25 4.925 1.8 30 30 300 300 3.3 5.0 3.35 5.075 10 53 60 525 600 700 mV V mA ISHDN Regulator off (MAX15007 only) CONDITIONS MIN 4 10 8 11 9 10.5 8.5 11.5 9.5 12 10 13 11 90 93 3 TYP MAX 40 17 15 18 16 18 16 19 17 20 18 21 19 150 150 5 A A UNITS V
2
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40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 14V, IOUT = 1mA, CIN = 0.1F, COUT = 2.2F, TA = TJ = -40C to +125C, unless otherwise noted. Typical specifications are at TA = +25C.) (Note 2)
PARAMETER Line Regulation Load Regulation Output Current Limit Output Voltage Noise Power-Supply Rejection Ratio FB Threshold Voltage FB Input Current ENABLE LOGIC Enable Threshold Voltage Enable Threshold Hysteresis Enable Pulldown Current Enable to Regulation Time THERMAL SHUTDOWN Thermal Shutdown Thermal Shutdown Hysteresis TSHDN THYST Junction temperature rising +165 20 C C Internally pulled down to GND (Note 6) VIL VIH 1.4 60 0.5 0.4 2 0.4 V mV A ms PSRR VFB IFB 100Hz to 100kHz, IOUT VOUT = 3.3V = 50mA, COUT = 2.2F VOUT = 5V f = 100Hz, VIN_RIPPLE = 500mVP-P, IOUT = 50mA ILOAD = 1mA (MAX15006C/MAX15007C only) VFB = 0V, 1.5V (MAX15006C/MAX15007C only) 1.2 -100 SYMBOL CONDITIONS 6V VIN 35V, IOUT = 1mA VIN = VOUT + 3V, IOUT = 100A to 50mA 80 115 179 66 1.23 1.26 +100 0.7 MIN TYP MAX 0.25 1.5 350 UNITS % % mA VRMS dB V nA
MAX15006/MAX15007
Limits at TA = -40C are guaranteed by design. Output voltage regulation is guaranteed for IOUT 5A. Dropout voltage is defined as (VIN - VOUT) when VOUT is 2% below the value of VOUT when VIN = VOUT + 3V. For VOUT = 3.3V, the 700mV dropout indicates VOUT does not reach 2% below VOUT at VIN = VOUT + 3V at minimum 4V input voltage. Note 6: Enable to regulation time is the time the output takes to reach 95% of its final value with VIN = 14V and EN is taken from VIL to VIH in 5ns. Note 2: Note 3: Note 4: Note 5:
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3
40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007
Typical Operating Characteristics
(VIN = 14V, CIN = 0.1F, COUT = 2.2F, VEN = VIN, TA = +25C, unless otherwise noted.)
OUTPUT VOLTAGE vs. INPUT VOLTAGE (MAX15006A/MAX15007A)
MAX15006 toc01
OUTPUT VOLTAGE vs. INPUT VOLTAGE (MAX15006B/MAX15007B)
MAX15006 toc02
OUTPUT VOLTAGE vs. TEMPERATURE (MAX15006A/MAX15007A)
3.42 3.39 3.36 VOUT (V) 3.33 3.30 3.27 3.24 3.21 IOUT = 50mA IOUT = 1mA
MAX15006 toc03
3.6 3.3 3.0 2.7 VOUT (V) 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0 0 5 10 15 20 VIN (V) 25 30 IOUT = 0 35
5.5 5.0 4.5 4.0 3.5 VOUT (V) 3.0 2.5 2.0 1.5 1.0 0.5 0 IOUT = 0 0 5 10 15 20 VIN (V) 25 30 35
3.45
3.18 3.15 40 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C)
40
OUTPUT VOLTAGE vs. TEMPERATURE (MAX15006B/MAX15007B)
MAX15006 toc04
DROPOUT VOLTAGE vs. LOAD CURRENT (MAX15006B/MAX15007B)
MAX15006 toc05
GROUND CURRENT vs. LOAD CURRENT (MAX15006B/MAX15007B)
90 80 70 IGND (A) 60 50 40 30 20 10 0 TA = -40C TA = +25C TA = +125C
MAX15006 toc06
5.25 5.20 5.15 5.10 VOUT (V) 5.05 5.00 4.95 4.90 4.85 4.80 4.75 -50 -25 0 25 50 75 IOUT = 50mA IOUT = 1mA
500 450 400 350 VDROPOUT (mV) 300 250 200 150 100 50 0 TA = -40C TA = +25C TA = +125C
100
100 125 150
0
5
10 15 20 25 30 35 40 45 50 IOUT (mA)
0
5
10 15 20 25 30 35 40 45 50 IOUT (mA)
TEMPERATURE (C)
GROUND CURRENT vs. TEMPERATURE (IOUT = 0)
MAX15006 toc07
GROUND CURRENT vs. TEMPERATURE (IOUT = 50mA)
MAX15006 toc08
SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE
9 8 7 ISHDN (A) 6 5 4 3 2 1 0 VIN = +6V VIN = +14V VIN = +40V
MAX15006 toc09
18 16 14 12 IGND (A) 10 8 6 4 2 0 -50 -25 0 25 50 75 VIN = +6V VIN = +14V VIN = +40V
100 99 98 97 IGND (A) 96 95 94 93 92 91 90
10
100 125 150
-50
-25
0
25
50
75
100 125 150
-50
-25
0
25
50
75
100 125 150
TEMPERATURE (C)
TEMPERATURE (C)
TEMPERATURE (C)
4
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40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO
Typical Operating Characteristics (continued)
(VIN = 14V, CIN = 0.1F, COUT = 2.2F, VEN = VIN, TA = +25C, unless otherwise noted.)
GROUND CURRENT DISTRIBUTION (TA = -40C)
MAX15006 toc10
MAX15006/MAX15007
GROUND CURRENT DISTRIBUTION (TA = +25C)
MAX15006 toc11
GROUND CURRENT DISTRIBUTION (TA = +125C)
24 21 NUMBER OF UNITS 18 15 12 9 6 3 0 MAX15007, IOUT = 0 50 UNITS TESTED
MAX15006 toc12
27 24 21 NUMBER OF UNITS 18 15 12 9 6 3 0 10.4 10.5 10.6 10.7 10.8 IGND (A) 10.9 11.0 MAX15007, IOUT = 0 50 UNITS TESTED
27 24 21 NUMBER OF UNITS 18 15 12 9 6 3 0 10.8 10.9 11.0 11.1 11.2 IGND (A) 11.3 11.4 MAX15007, IOUT = 0 50 UNITS TESTED
27
11.6
11.7
11.8
11.9
12.0
12.1
IGND (A)
LOAD-TRANSIENT RESPONSE (MAX15006B/MAX15007B)
MAX15006 toc13
INPUT-VOLTAGE STEP RESPONSE (MAX15006B/MAX15007B, IOUT = 1mA)
MAX15006 toc14
STARTUP RESPONSE
MAX15006 toc15
VOUT AC-COUPLED 200mV/div
18V VIN 14V
VIN 5V/div
50mA IOUT 1mA
VOUT AC-COUPLED 100mV/div MAX15006B/MAX15007B IOUT = 1mA
VOUT 2V/div
400s/div
400s/div
200s/div
ENABLE STARTUP RESPONSE
MAX15006 toc16
ENABLE STARTUP RESPONSE
MAX15006 toc17
ENABLE STARTUP RESPONSE
MAX15006 toc18
EN 1V/div
EN 1V/div
EN 1V/div
VOUT 2V/div MAX15006B/MAX15007B IOUT = 0 400s/div MAX15006B/MAX15007B IOUT = 50mA 400s/div
VOUT 2V/div MAX15006B/MAX15007B VIN = 40V, IOUT = 0 400s/div
VOUT 2V/div
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5
40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007
Typical Operating Characteristics (continued)
(VIN = 14V, CIN = 0.1F, COUT = 2.2F, VEN = VIN, TA = +25C, unless otherwise noted.)
ENABLE STARTUP RESPONSE
MAX15006 toc19
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX15006 toc20
OUTPUT-NOISE SPECTRAL DENSITY vs. FREQUENCY
OUTPUT-NOISE SPECTRAL DENSITY (V/Hz)
MAX15006 toc21
0 -10 EN 1V/div PSRR (dB) -20 -30 -40 -50 -60 -70 -80 -90 -100 0.01 0.1 1 10 COUT = 10F COUT = 2.2F
IOUT = 50mA
10
1
VOUT 2V/div MAX15006B/MAX15007B VIN = 40V, IOUT = 50mA 400s/div
0.1
MAX15006A/MAX15007A IOUT = 50mA 0.01 0.01 0.1 1 FREQUENCY (kHz) 10 100
100
1000
FREQUENCY (kHz)
OUTPUT-NOISE SPECTRAL DENSITY vs. FREQUENCY
OUTPUT-NOISE SPECTRAL DENSITY (V/Hz)
MAX15006 toc22
OUTPUT VOLTAGE NOISE vs. LOAD CURRENT
135 120 105 en (VRMS) 90 75 60 45 30
MAX15006 toc23
10
150
1
0.1
MAX15006B/MAX15007B IOUT = 50mA 0.01 0.01 0.1 1 FREQUENCY (kHz) 10 100
15 0 0 5
MAX15006A/MAX15007A 10 15 20 25 30 35 40 45 50 IOUT (mA)
FB VOLTAGE vs. INPUT VOLTAGE (MAX15007C, VOUT = 5V)
MAX15006 toc24
FB VOLTAGE vs. TEMPERATURE (MAX15007C, VOUT = 5V)
1.229 1.228 1.227
MAX15006 toc25
1.230
1.230
1.229
VFB (V)
VFB (V)
1.228
1.226 1.225 1.224 1.223
1.227
1.226
1.222 1.221
1.225 5 10 15 20 25 30 35 40 VIN (V)
1.220 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C)
6
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40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO
Typical Operating Characteristics (continued)
(VIN = 14V, CIN = 0.1F, COUT = 2.2F, VEN = VIN, TA = +25C, unless otherwise noted.)
MAX15006/MAX15007
OUTPUT VOLTAGE NOISE vs. OUTPUT CAPACITANCE
135 120 105 en (VRMS) 90 75 60 45 30 15 0 0 2 4 6 8 10 12 14 16 18 20 22 COUT (F) MAX15006A/MAX15007A IOUT = 25mA
MAX15006 toc26
CLAMPED LOAD DUMP (IOUT = 0)
150
MAX15006 toc27
40V VIN 13.5V
VOUT AC-COUPLED 20mV/div
100ms/div
Pin Description
PIN MAX15006A/B TDFN 1, 2 SO 1 MAX15006C TDFN 1, 2 SO 1 MAX15007A/B TDFN 1, 2 SO 1 MAX15007C TDFN 1, 2 SO 1 IN Regulator Supply Input. Supply voltage ranges from 4V to 40V. Bypass with a 0.1F capacitor to GND. No Connection. Not internally connected. Ground Regulator Output. Bypass OUT to GND with a low-ESR capacitor with a minimum 2.2F. Feedback Regulation Set-Point. Connect an external resistive divider network from OUT to FB to GND to adjust the output voltage from 1.8V to 10V. Active-High Enable Input. Force EN high (or connect to VIN) to turn the regulator on. Pull EN low (or leave unconnected) to place the device in a low-power shutdown mode. EN is internally pulled down to GND through a 0.5A sink current. Exposed Pad. Internally connected to GND. Connect EP to the ground plane for enhanced thermal performance. Do not use EP as a ground connection. NAME FUNCTION
3 4 5, 6
2, 3, 4, 6, 7 5 8
3 4 6
2, 3, 4, 6 5 8
-- 4 5, 6
2, 4, 6, 7 5 8
-- 4 6
2, 4, 6 5 8
N.C. GND OUT
--
--
5
7
--
--
5
7
FB
--
--
--
--
3
3
3
3
EN
--
--
--
--
--
--
--
--
EP
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7
40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007
Functional Diagrams
IN
+ THERMAL SENSOR 1.242V REF ERROR AMPLIFIER
FET DRIVER WITH CURRENT LIMIT
OUT
FB (FOR MAX15006C ONLY)
GND
MAX15006
(FOR MAX15006A/B ONLY)
Figure 1. MAX15006 Simplified Functional Diagram
IN
EN
CONTROL LOGIC
+
FET DRIVER WITH CURRENT LIMIT
THERMAL SENSOR
1.242V REF
ERROR AMPLIFIER
OUT
FB (FOR MAX15007C ONLY)
GND
MAX15007
(FOR MAX150076A/B ONLY)
Figure 2. MAX15007 Simplified Functional Diagram
8
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40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO
Detailed Description
The MAX15006/MAX15007 high-voltage linear regulators operate over a 4V to 40V input voltage range. These devices guarantee 50mA load drive, and offer preset output voltages of +3.3V (MAX15006A/MAX15007A) or +5V (MAX15006B/MAX15007B) or an adjustable voltage output from 1.8V to 10V (MAX15006C/MAX15007C). Thermal shutdown and short-circuit protection prevent damage during overtemperature and overcurrent conditions. The MAX15007 includes an enable input (EN) allowing the regulators to be turned on/off using a logiclevel voltage. Driving EN high turns on the device while driving EN low places the device in a low-power shutdown mode. In shutdown, the supply current is reduced to 3A (typ). The MAX15006/MAX15007 operate over the -40C to +125C automotive temperature range. All devices are available in thermally enhanced 6-pin TDFN and 8-pin SO packages capable of dissipating 1.904W and 1.860W at TA = +70C, respectively.
EN Input (MAX15007 Only)
EN is an active-high, logic-level enable input that turns the device on or off. Drive EN high to turn the device on. An internal 0.5A pulldown current keeps the MAX15007 in shutdown mode when driven by a threestate driver in high-impedance mode, or an open-drain driver. While in shutdown, the device consumes only 3A (typ). EN withstands voltages up to 40V, allowing it to be driven by high input level voltages or connected to IN for always-on operation.
MAX15006/MAX15007
Thermal Protection
When the junction temperature exceeds +165C, an internal thermal sensor turns the pass transistor off, and allows the device to cool. The thermal sensor turns the pass transistor on again after the junction temperature cools by 20C. This results in a cycled output during continuous thermal-overload conditions. Thermal protection protects the MAX15006/MAX15007 in the event of fault conditions. Operation at TJ = +150C without going into thermal shutdown is not guaranteed. Use Figures 3a and 3b to determine the minimum guaranteed output current.
Regulator
The regulator accepts an input voltage from 4V to 40V. The MAX15006A/MAX15007A have a fixed 3.3V output voltage while the MAX15006B/MAX15007B offer a fixed 5V output voltage. The MAX15006C/MAX15007C feature an adjustable voltage output by connecting an external resistive divider from OUT to FB and to GND (see the Output Voltage Setting section).
Output Short-Circuit Current Limit
The MAX15006/MAX15007 feature a 175mA current limit. The output can be shorted to GND for an indefinite period of time without damage to the device. During a short circuit, the power dissipated across the pass transistor can quickly heat the device. When the die temperature reaches +165C, the MAX15006/ MAX15007 shut down and automatically restart after the die temperature cools by 20C.
MAX15006 fig03a
50 45 OUTPUT CURRENT (mA) 40 35 30 25 20 15 10 5 0 VIN = 26V, VOUT = 5V
VIN = 18V, VOUT = 5V
50 45 OUTPUT CURRENT (mA) 40 35 30 25 20 15 10 5 0 VIN = 26V, VOUT = 5V
VIN = 18V, VOUT = 5V
VIN = 18V, VOUT = 3.3V
VIN = 18V, VOUT = 3.3V
VIN = 26V, VOUT = 3.3V
VIN = 26V, VOUT = 3.3V
80 85 90 95 100 105 110 115 120 125 130 AMBIENT TEMPERATURE (C)
80 85 90 95 100 105 110 115 120 125 130 AMBIENT TEMPERATURE (C)
Figure 3a. Minimum Output Current vs. Ambient Temperature (6-Pin TDFN-EP)
Figure 3b. Minimum Output Current vs. Ambient Temperature (8-Pin SO-EP)
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MAX15006 fig03b
55
55
40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007
Applications Information
Output Voltage Setting
The MAX15006C/MAX15007C provide an adjustable output voltage from 1.8V to 10V and do not operate in a preset output voltage mode. Connect an external resistive divider from OUT to FB to GND as shown in Figure 4 to set the desired output voltage. VOUT is calculated as follows: R1 VOUT = VFB x 1 + R2 where V FB = 1.23V and a 5A minimum current is required in the external divider for stability. For the SO-EP package:
1.8605W for TA + 70C PD = W 1.8605W - 0.0233 x (TA - 70C) for + 70C < TA + 125C C
After determining the allowable package dissipation, calculate the maximum allowable output current, without exceeding the +150C junction temperature, using the following formula: IOUT(MAX) = PD 50mA VIN - VOUT
Available Output Current Calculation
The MAX15006/MAX15007 provide up to 50mA of continuous output current. The input voltage range extends to 40V. Package power dissipation limits the amount of output current available for a given input/output voltage and ambient temperature. Figure 5 shows the maximum allowable power dissipation for these devices to keep the junction temperature below +150C. Figure 5 assumes that the exposed metal pad of the MAX15006/MAX15007 is soldered to 1in2 of PCB copper. Use Figure 5 to determine the allowable package dissipation for a given ambient temperature. Alternately, use the following formulas to calculate the allowable package dissipation. For the TDFN package:
1.9048W for TA + 70C PD = W 1.9048W - 0.0238 x (TA - 70C) for + 70C < TA + 125C C
The above equations do not include the negligible power dissipation from self-heating due to the IC ground current. Example 1 (TDFN Package): TA = +125C VIN = 26V VOUT = 3.3V Calculate the maximum allowable package dissipation at the given temperature as follows:
PD = 1.9048W - 0.0238 W (125C - 70C) = 595.8mW C
And establish the maximum output current: IOUT(MAX) = 595.8mW = 26.2mA 26V - 3.3V
IN
OUT R1
0.1F
2.2F
1.9408W (6-PIN TDFN) 1.8605W (8-PIN SO-EP) DERATE 23.8mW/C
MAX15007C
FB EN
1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 PD (W)
ON OFF
DERATE 23.3mW/C
R2 GND
20
40
VOUT = VFB (1 + R1/R2) VFB = 1.23V
60 80 100 TEMPERATURE (C)
120
140
Figure 4. Setting the Adjustable Output Voltage
10
Figure 5. Calculated Maximum Power Dissipation vs. Ambient Temperature
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MAX15006 fig04
+4V TO +40V
+1.8V TO +10V
2.4 2.2 2.0
40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO
Example 2 (TDFN Package): TA = +85C VIN = 14V VOUT = 5V Calculate the maximum allowable package dissipation at the given temperature as follows:
W PD = 1.9048W - 0.0238 (85C - 70C) = 1.5478W C
In Examples 2 and 3, the maximum output current is calculated as 172mA and 476mA, respectively; however, the allowable output current cannot exceed 50mA. Alternately, use Figures 6a and 6b to quickly determine the maximum allowable output current for selected ambient temperatures and input voltages.
MAX15006/MAX15007
Output-Capacitor Selection and Regulator Stability
For stable operation over the full temperature range and with load currents up to 50mA, use a low-ESR 2.2F (min) ceramic or tantalum output capacitor. Use larger output-capacitor values such as 22F to reduce noise, improve load-transient response, and powersupply rejection. Some ceramic dielectrics exhibit large capacitance and ESR variations with temperature. Ensure the minimum capacitance under worst-case conditions does not drop below 1.3F to ensure output stability. With an X7R dielectric, 2.2F should be sufficient at all operating temperatures.
Then determine the maximum output current:
IOUT(MAX) = 1.5478W = 172mA IOUT(MAX) = 50mA 14V - 5V
Example 3 (TDFN Package): TA = +50C VIN = 9V VOUT = 5V Calculate the maximum allowable package dissipation at the given temperature as follows: PD = 1.9048W Find the maximum output current:
IOUT(MAX) = 1.9048W = 476mA IOUT(MAX) = 50mA 9V - 5V
MAX15006 fig05a
50 45 IOUT(MAX) (mA) 40 35 30 25 20 15 10 5 0 0 5 10 15 20 VIN (V) 25 30 35 VOUT = 5V 6-PIN TDFN TA = +125C TA = +70C TA = +85C
50 45 IOUT(MAX) (mA) 40 35 30 25 20 15 10 5 0 TA = +125C
TA = +70C TA = +85C
VOUT = 5V 8-PIN SO-EP 0 5 10 15 20 VIN (V) 25 30 35 40
40
Figure 6a. Calculated Maximum Output Current vs. Input Voltage (6-Pin TDFN-EP)
Figure 6b. Calculated Maximum Output Current vs. Input Voltage (8-Pin SO-EP)
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MAX15006 fig05b
60 55
60 55
11
40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007
Selector Guide
PART MAX15006AASA+ MAX15006AATT+ MAX15006BASA+ MAX15006BATT+ MAX15006CASA+ MAX15006CATT+ MAX15007AASA+ MAX15007AATT+ MAX15007BASA+ MAX15007BATT+ MAX15007CASA+ MAX15007CATT+ ENABLE INPUT -- -- -- -- -- -- FIXED OUTPUT VOLTAGE (V) 3.3 3.3 5 5 -- -- 3.3 3.3 5 5 -- -- ADJUSTABLE OUTPUT VOLTAGE (V) -- -- -- -- ADJ (1.8 to 10) ADJ (1.8 to 10) -- -- -- -- ADJ (1.8 to 10) ADJ (1.8 to 10) PIN-PACKAGE 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP 8 SO-EP 6 TDFN-EP
Pin Configurations (continued)
TOP VIEW
OUT OUT (FB) 6 5 GND 4 IN N.C. 1 2 3 *EP
MAX15007A MAX15007B MAX15007C +
8 7 6 5 OUT N.C. (FB) N.C. GND
MAX15007A MAX15007B MAX15007C +
1 IN 2 IN *EP 3 EN
EN
N.C. 4
SO
*EXPOSED PAD ( ) FOR MAX15007C ONLY.
TDFN
12
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40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO
Ordering Information (continued)
PART MAX15006BATT+ MAX15006BATT/V+ MAX15006CASA+* MAX15006CATT+ MAX15007AASA+ MAX15007AATT+ MAX15007BASA+ MAX15007BATT+ MAX15007CASA+* TEMP RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C PINTOP PACKAGE MARK 6 TDFN6 TDFN8 SO-EP** 6 TDFN8 SO-EP** 6 TDFN8 SO-EP** 6 TDFN8 SO-EP** APF -- -- API -- APG -- APH -- APJ
Chip Information
PROCESS: BiCMOS
MAX15006/MAX15007
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE 6 TDFN-EP 8 SO-EP PACKAGE CODE T633-2 S8E-12 DOCUMENT NO. 21-0137 21-0111
-40C to +125C 6 TDFNMAX15007CATT+ +Denotes a lead(Pb)-free/RoHS-compliant package. *Future product--contact factory for availability. **EP = Exposed pad. /V Denotes an automotive-qualified part.
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13
40V, Ultra-Low Quiescent-Current Linear Regulators in 6-Pin TDFN/8-Pin SO MAX15006/MAX15007
Revision History
REVISION NUMBER 0 1 REVISION DATE 10/06 5/08 Initial release Added MAX15006C/MAX15007C adjustable version to data sheet including Ordering Information, Electrical Characteristics, Pin Description, and Detailed Description. Added the MAX15006A/MAX15006B automotive packages to the Ordering Information. DESCRIPTION PAGES CHANGED -- 1-14
2
11/09
1, 13
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.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

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