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POWER MANAGEMENT Description
The SC96A is a synchronous step-down converter with integrated power devices. The SC96A is designed for single-cell Li-Ion battery applications but can also be used in fixed 3.3V or 5V applications. The switching frequency is nominally set to MHz, allowing the use of small inductors and capacitors. The maximum current rating of the internal MOSFET switches allows a DC output current of 1.5A. Four programable output voltages 1.00V/1.05V/1.20V/ 1.80V are available. See SC196 with external feedback for other output voltage settings. The SC196A has a flexible clocking methodology that allows it to be synchronized to an external oscillator or controlled by the internal oscillator. The device can operate in either forced PWM mode or in PSAVE mode. If PSAVE mode is enabled, the part will automatically enter PFM at light loads to maintain maximum efficiency across the full load range. For noise sensitive applications, PSAVE mode can be disabled by synchronizing to an external oscillator or pulling the SYNC/PWM pin high. Shutdown turns off all the control circuitry to achieve a typical shutdown current of 0.A.
1.5A Synchronous Buck Converter with Integrated Power Devices
Features
Up to 93% efficiency 1.00V/1.05V/1.20V/1.80V selectable output voltage Output current -- 1.5A Quiescent current -- 7A Input range -- 2.7V to 5.5V Dynamic voltage positioning capability Fixed 1MHz frequency or 750kHz to 1.25MHz synchronized operation PSAVE operation to maximize efficiency at light loads Minimal external components Fast transient response 100% duty cycle in dropout Soft-start Over-temperature and short-circuit protection Space-saving lead-free package -- MLP-10, 3 x 3mm
SC196A
Applications
Cell phones Wireless communication chipset power Personal media player Notebook and sub-notebook computers PDAs and mobile communicators WLAN peripherals
Typical Application Circuit
VIN 2.7V to 5.5V CIN 10F
VIN EN SYNC/PWM VID0 VID1 MODE
SC196A
L1 LX VOUT PGND GND 4.7H COUT 10F
VOUT 1.05V 1.5A
November 2, 2006
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SC196A
POWER MANAGEMENT Absolute Maximum Ratings
Parameter Input Supply Voltage Logic Inputs (SYNC/PWM, EN, MODE, VID0, VID1) Output Voltage LX Voltage Thermal Impedance Junction to Ambient(1) VOUT Short-Circuit to GND Operating Ambient Temperature Range Storage Temperature Junction Temperature Peak IR Reflow Temperature ESD Protection Level (2) Symbol VIN VN VOUT VLX JA tSC TA TS TJ TPKG VESD Maximum -0.3 to 7 -0.3 to VIN+0.3, 7V Max -0.3 to VIN+0.3, 7V Max -1 to VIN +1, -2V(100ns Max),7V Max 40 Continuous -40 to +85 -60 to +150 -40 to +150 260 2
PRELIMINARY
Exceeding the specifications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not recommended.
Units V V V V C/W s C C C C kV
Note: (1) Calculated from package in still air, mounted to 3" x 4.5", 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards. (2) Tested according to JEDEC standard JESD22-A114-B.
Electrical Characteristics
Unless otherwise noted: VIN = 3.6V, EN = VIN, SYNC/PWM = VIN, MODE = VIN , TA = -40 to 85C. Typical values are at TA = 25C.
Parameter Input Voltage Range VOUT Accuracy VOUT Temperature Accuracy Line Regulation Load Regulation (PWM) PSAVE Regulation P-Channel On Resistance N-Channel On Resistance Start-Up Time P-Channel Current Limit 2006 Semtech Corp.
Symbol VIN VOUT VOUT(T) VOUT LINE VOUT LOAD VOUT PSAVE RDSP RDSN TSTART ILIM(P)
Conditions
Min 2.7
Typ
Max 5.5 1
Units V % % % % %
IOUT = 0.75A, TA = 25C IOUT = 0.75A, TA = -40 to 85C VIN = 2.7V to 5.5V, VOUT = 1.8V, IOUT = 0.75A, TA = -40 to 85C IOUT = 0A to 1.5A, TA = -40 to 85C SYNC/PWM =GND, COUT=22 F ILX = 100mA ILX = 100mA 0.3 0.4 0.3 +1.3 -0.3 0.275 0.165
0.7 0.65 0.65 +1.6 -0.6
5 1.9 2 2.63
ms A
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SC196A
POWER MANAGEMENT Electrical Characteristics (Cont.)
Parameter Quiescent Current Shutdown Current LX Leakage Current PMOS LX Leakage Current NMOS Oscillator Frequency SYNC Frequency (upper) SYNC Frequency (lower) UVLO Threshold (upper) UVLO Hysteresis Thermal Shutdown Thermal Shutdown Hysteresis Logic Input High Logic Input Low Logic Input Current High Logic Input Current Low Symbol IQ ISD ILXP ILXN fOSC fSYNCU fSYNCL VUVL VUVLHYS TSD TSD-HYS VIH VIL IIH IIL EN, SYNC/PWM, VID0, VID1, MODE EN, SYNC/PWM, VID0, VID1, MODE EN, SYNC/PWM, VID0, VID1, MODE EN, SYNC/PWM, VID0, VID1, MODE -2 -2 0.1 0.1 1.2 0.4 2 2 2.38 2.52 135 145 10 Conditions SYNC/PWM = GND, IOUT = 0A, VOUT = 1.04 x VOUT(Programmed) EN = GND, LX = OPEN LX = GND, EN = GND LX = 3.6V, EN = GND -2 0.85 1.25 750 2.65 Min Typ 17 0.1 0.1 0.1 1.0 1.15
PRELIMINARY
Max 28 1 2 Units A A A A MHz MHz kHz V mV C C V V A A
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SC196A
POWER MANAGEMENT Pin Configuration Ordering Information
DEVICE SC196AMLTRT(1)(2) SC196AEVB PACKAGE MLP 3x3-10 Evaluation Board
PRELIMINARY
VIN MODE SYNC/PWM EN VOUT
1 2 3 4
T
10
LX PGND GND VID1 VID0
TOP VIEW
9 8 7 6
Notes: (1) Lead-free packaging only. This product is fully WEEE and RoHS compliant. (2) Available in tape and reel only. A reel contains 3000 devices.
Ordering Information
5
Programmable Output Voltage
VID1 VID0 0 1 0 1 SC196A VOUT 1.0V 1.05V 1.2V 1.8V 0 0 1 1
MLP10: 3X3 10 LEAD
Marking Information
196A yyww xxxx
yy = two digit year of manufacture ww = two digit week of manufacture xxxx = lot number
2006 Semtech Corp.
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SC196A
POWER MANAGEMENT Block Diagram PRELIMINARY
Plimit Amp
1 Current Amp
VIN
EN
4
SYNC /PWM
3
OSC & Slope Generator Control Logic
PWM Comp 10 LX
500mV Ref
Error Amp
PSAVE Comp
Nlimit Amp
MODE
2
9
PGND
VID1 VID0
7 6
Voltage Select
8
GND
VOUT
5
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SC196A
POWER MANAGEMENT Pin Descriptions
Pin # 1 2 Pin Name VIN MODE Pin Function Input power supply voltage MODE select pin - MODE = VIN to select 100% duty cycle function; MODE = GND to disable 100% duty cycle capability. Oscillator synchronization input - Tie to VIN for forced PWM mode or GND to allow the part to enter PSAVE mode at light loads. Apply an external clock signal for frequency synchronization. Enable digital input - a high input enables the SC196A; a low disables and reduces quiescent current to less than 1A. In shutdown, LX becomes high impedance. Regulated output voltage and feedback for SC196A Logic level bit 0 used in conjunction with VID1 to set the output voltage. Connect high or low as required to select the desired output voltage. If not connected, the output voltage will be indeterminate. Logic level bit 1 used in conjunction with VID0 to set the output voltage. Connect high or low as required to select the desired output voltage. If not connected, the output voltage will be indeterminate. Ground Power Ground Inductor connection to the switching FETs
PRELIMINARY
3 4 5 6 7 8 9 10
SYNC/PWM EN VOUT VID0 VID1 GND PGND LX
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SC196A
POWER MANAGEMENT Applications Information
SC196A Detailed Description The SC96A is a synchronous step-down, Pulse Width Modulated (PWM), DC-DC converter utilizing a MHz fixed-frequency current mode architecture. The device is designed to operate in a fixed-frequency PWM mode across the full load range and can enter Power Save Mode (PSAVE), utilizing Pulse Frequency Modulation (PFM) at light loads to maximize efficiency. Operation During normal operation, the PMOS is activated on each rising edge of the internal oscillator. Current feedback for the switching regulator uses the PMOS current path, and it is amplified and summed with the internal slope compensation network. The voltage feedback loop uses an internal feedback divider. The on-time is determined by comparing the summed current feedback and the output of the error amplifier. The period is set by the onboard oscillator or by an external clock attached to the SYNC/ PWM pin. The SC196A has an internal synchronous NMOS rectifier and does not require a Schottky diode on the LX pin. Programmable Output Voltage The SC96A has four pre-determined output voltage values which can be individually selected by the correct programming of the VID0 and VID1 pins (see Programmable Output Voltage table on Page 4). This eliminates the need for external programming resistors, saving PCB area and inventory. The VID pins can be statically tied to GND or VIN for fixed output configurations, or they may be driven by a microprocessor, enabling the possibility of dynamic voltage adjustment for host equipment "sleep" states. Continuous Conduction & Oscillator Synchronization The SC96A is designed to operate in continuous conduction, fixed-frequency mode. When the SYNC/PWM pin is tied high, the part runs in PWM mode using the internal oscillator. The part can be synchronized to an external clock by driving a clock signal into the SYNC/ PWM pin. The part synchronizes to the rising edge of the clock. Protection Features The SC96A provides the following protection features: * Thermal shutdown * Current limit
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PRELIMINARY
* Over-voltage protection * Soft-start Thermal Shutdown The device has a thermal shutdown feature to protect the SC196A if the junction temperature exceeds 145C. In thermal shutdown, the on-chip power devices are disabled, tri-stating the LX output. Switching will resume when the temperature drops by 10C. During this time, if the output voltage decreases by more than 60% of its programmed value, a soft-start will be invoked. Current Limit The PMOS and NMOS power devices of the buck switcher are protected by current limit functions. In the case of a short to ground on the output, the part enters frequency foldback mode, which causes the switching frequency to divide by a factor determined by the output voltage. This prevents the inductor current from "stair-casing". Over-Voltage Protection Over-voltage protection is provided on the SC96A. In the event of an over-voltage on the output, the PWM drive is disabled, tri-stating the LX output. The part will not resume switching until the output voltage has fallen 2% below the regulation voltage. Soft-Start The soft-start mode is enabled after every shutdown cycle to limit in-rush current. In conjunction with the frequency foldback, this controls the maximum current during startup. The PMOS current limit is stepped up through seven soft-start levels to the full value by a timer driven from the internal oscillator. During soft-start, the switching frequency is stepped by 1/8, 1/4, and 1/2 of the internal oscillator frequency up to the full value, under control of three output voltage thresholds. As soon as the output voltage is within 2% of the regulation voltage, soft-start mode is disabled. Power Save Mode Operation The PSAVE mode may be selected by tying the SYNC/ PWM pin to GND. Selecting PSAVE mode will enable the SC196A to automatically activate/deactivate operation at light loads, maximizing efficiency across the full load range. The SC96A automatically detects the load current at which it should enter PSAVE mode. The SC196A is optimized to track maximum efficiency with respect to VIN.
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SC196A
POWER MANAGEMENT Applications Information (Cont.)
In PSAVE mode, VOUT is driven from a lower level to an upper level by a switching burst. Once the upper level has been reached, the switching is stopped and the quiescent current is reduced. VOUT falls from the upper to lower levels in this low current state as the load current discharges the output capacitor. The burst-to-off period in PSAVE will decrease as the load current reduces. The PSAVE switching burst frequency is controlled so that the inductor current ripple is similar to that in PWM mode. The minimum switching frequency during this period is limited to 650kHz. The SC196A automatically detects when to exit PSAVE mode by monitoring VOUT . For the SC196A to exit PSAVE mode, the load must be increased, causing VOUT to decrease until the power save exit threshold is reached. PSAVE levels are set high to minimize the undershoot when exiting PSAVE. The lower PSAVE comparator level is set +0.7% above VOUT, and the upper comparator level at +1.5% above VOUT with the exit threshold at -2% below VOUT. If PSAVE operation is required, then a 22F output capacitor must be used.
PRELIMINARY
100% Duty Cycle Operation The 100% duty cycle mode may be selected by connecting the MODE pin high. This will allow the SC96A to maintain output regulation under low input voltage/high output voltage conditions. In 100% duty cycle operation, as the input supply drops toward the output voltage, the PMOS on-time increases linearly above the maximum value in fixed-frequency operation until the PMOS is active continuously. Once the PMOS is switched on continuously, the output voltage tracks the input voltage minus the voltage drop across the PMOS power device and inductor according to the following relationship:
VOUT = VI N - IOUT x ( RDSP + RIND )
where,
VOUT VIN IOUT RDSP RIND
= Output voltage = Input voltage = Output current = PMOS switch ON resistance = Series resistance of the inductor
The 100% duty cycle can only operate for a programmed output voltage of 1.8V. With an output voltage of 1.8V, 100% duty cycle mode will only be required to maintain regulation if VIN falls below a minimum value shown in the graph below.
Power Save Operation
BURST OFF Higher Load Applied
Minimum VIN for Fixed Frequency Operation Vs. RIND
3
1.5% 0.7%
VOUT
2.95
2.9
PSAVE Mode at Light Load
VIN (V)
PWM Mode at Medium/ High Load
2.85
-2%
2.8
Inductor Current
2.75 VOUT = 1.8V IOUT =1A 2.7 0.05 0.1 0.15 0.2 0.25 0.3
Inductor DC R esistance ()
0A
Time
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SC196A
POWER MANAGEMENT Applications Information (Cont.)
Inductor Selection The SC196A is designed for use with a 4.7H inductor. The magnitude of the inductor current ripple is dependent on the inductor value and can be determined by the following equation:
PRELIMINARY
Output voltage ripple is a combination of the voltage ripple from the charge - discharge cycle of the output capacitor and the voltage created by the inductor ripple current passing through the output capacitor ESR. Selecting an output capacitor with a low ESR will reduce the output voltage ripple component, as can be seen in the following equation:
This equation demonstrates the relationship between input voltage, output voltage, and inductor ripple current. The inductor should have a low DCR to minimize the conduction losses and maximize efficiency. As a minimum requirement, the DC current rating of the inductor should be equal to the maximum load current plus half of the inductor current ripple, as shown by the following equation:
Capacitors with X7R or X5R ceramic dielectric are strongly recommended for their low ESR and superior temperature and voltage characteristics. Y5V capacitors should not be used as their temperature coefficients make them unsuitable for this application. Table 2 lists the manufacturers of recommended capacitor options. Table 1 -- Recommended Inductors
Value (H) DCR () Rated Current (A) Tolerance (%) Dimensions LxWxH (mm)
Manufacturer/Part #
Final inductor selection will depend on various design considerations, such as efficiency, EMI, size and cost. Table lists the manufacturers of practical inductor options. CIN Selection The source input current to a buck converter is noncontinuous. To prevent large input voltage ripple, a low ESR ceramic capacitor is required. A minimum value of 10F should be used for sufficient input voltage filtering, and a 22F should be used for improved input voltage filtering. COUT Selection The internal compensation is designed to work with a certain output filter corner frequency, which is defined by the equation:
BI Technologies HM66404R1 Coilcraft D01608C-472ML TDK VLCF4020T- 4R7N1R2 Taiyo Yuden LMNP04SB4R7N TOKO D52LC Sumida CDRH3D16 Coilcraft LPS3015
4.1 4.7 4.7 4.7 4.7 4.7 4.7
0.057 0.09 0.098 0.050 0.087 0.050 0.2
1.95 1.5 1.24 1.2 1.14 1.2 1.1
20 20 30 30 20 30 20
5.7 x 5.7 x2.0 6.6 x 4.5 x 3.0 4.0 x 4.0 x 2.0 5.0 x 5.0 x 2.0 5.0 x 5.0 x 2.0 3.8 x 3.8 x 1.8 3.0 x 3.0 x 1.5
Note: recommended Inductors do not necessarily guarantee rated performance of the part.
Table 2 -- Recommended Capacitors
Manufacturer/Part # Value (F) Rated Voltage (VDC) Temperature Characteristic Case Size
Murata GRM21BR60J226ME39L Murata GRM188R60J106 MKE19 TDK C2012X5R0J106K
22
6.3
X5R
0805
This single pole filter is designed to operate with a minimum output capacitor value of 10F. Larger output capacitor values will improve transient performance. If PSAVE operation is required, the minimum capacitor value is 22F.
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10
6.3
X5R
0603
10
6.3
X5R
0603
Note: Where PSAVE operation is required, 22F must be used for COUT.
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SC196A
POWER MANAGEMENT Applications Information (Cont.)
PCB Layout Considerations Poor layout can degrade the performance of the DC-DC converter and can contribute to EMI problems, ground bounce, and resistive voltage losses. Poor regulation and instability can result. A few simple design rules can be implemented to ensure good layout: . Place the inductor and filter capacitors as close to the device as possible and use short wide traces between the power components.
PRELIMINARY
2. Route the output voltage feedback path away from the inductor and LX node to minimize noise and magnetic interference. 3. Maximize ground metal on the component side to improve the return connection and thermal dissipation. Separation between the LX node and GND should be maintained to avoid coupling of switching noise to the ground plane. . Use a ground plane with several vias connecting to the component side ground to further reduce noise interference on sensitive circuit nodes.
GND
VIN
CIN
LX
SC196A
LOUT
COUT
VOUT
GND
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SC196A
POWER MANAGEMENT Typical Characteristics
Efficiency vs. Load Current VOUT = 1.8V
100 90 80 70
VIN=4.2V PSAVE VIN=3.6V PSAVE
PRELIMINARY
Efficiency vs. Load Current VOUT = 1.0V
100 90 80 70
Efficiency (%)
VIN=4.2V PWM
VIN=2.7V PSAVE VIN=3.6V PSAVE VIN=4.2V PSAVE VIN=2.7V PWM
Efficiency (%)
60 50 40 30 20 10 0 0.0001
VIN=2.7V PSAVE
60 50 40 30 20 10 0
VIN=3.6V PWM
VIN=3.6V PWM VIN=2.7V PWM
VIN=4.2V PWM
0.001
0.01 IOUT (A)
0.1
1
0.0001
0.001
0.01 IOUT (A)
0.1
1
Efficiency vs. Load Current VOUT = 1.2V
100 90 80 70
Efficiency (%)
VIN=4.2V PSAVE
Efficiency vs. Input Voltage
100
95
VOUT=1.8V,PWM VOUT=1.8V,PSAVE
VIN=2.7V PSAVE
Efficiency(%)
60 50 40 30 20 10 0 0.0001
VIN=3.6V PSAVE
90
85
VIN=4.2V PWM VIN=3.6V PWM VIN=2.7V PWM
80
VOUT=1V,PWM VOUTt=1V,PSAVE
75
0.001
0.01 IOUT (A)
0.1
1
70 2.5
3.0
3.5
4.0 Vin(V)
4.5
5.0
5.5
IOUT=500 mA(PWM)/50 mA(PSAVE)
PWM to PSAVE Hysteresis
95
PSAVE Exit for increasing IOUT PSAVE Entry for decreasing IOUT
90
Efficiency (%)
85
PSAVE Mode IOUT increasing PSAVE MODE IOUT decreasing PWM Mode
80
75
70 0.001
0.01
IOUT (A)
0.1
1
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SC196A
POWER MANAGEMENT Typical Characteristics (Cont.)
VOUT vs. VIN
1.84
1.8025 1.8020
PRELIMINARY
VOUT vs. IOUT, VOUT=1.8V, PWM
1.83
1.8015
VOUT=1.8V PSAVE IOUT=50mA
1.8010 1.8005
VOUT (V)
1.82
VOUT=1.8V PWM IOUT=500mA
VOUT (V)
1.8000 1.7995 1.7990 1.7985 1.7980
1.81
1.80 2.5
1.7975
3.0
3.5
4.0
VIN (V)
4.5
5.0
5.5
6.0
0
0.2
0.4
0.6 IOUT (A)
0.8
1
1.2
VOUT vs. Temperature
VOUT=1.8V, PWM
1.8090 1.8085 1.8080
Quiescent Current (A)
22 21 20 19 18 17 16 15 14 13
Quiescent Current vs. Input Voltage
PSAVE Mode
TA = 85 C
1.8075 1.8070
Vout(V)
1.8065 1.8060 1.8055 1.8050 1.8045 1.8040 -50 -40 -30 -20 -10 0 10 20 TA(C) 30 40 50 60 70 80 90
TA = 25 C
TA = 40 C
12 2.5
3
3.5
4
VIN (V)
4.5
5
5.5
6
Quiescent Current vs. Input Voltage
6 PWM Mode
TA = 85 C TA = -40 C
P-Channel RDSON vs. Input Voltage
0.40
5.5
TA = 25 C
0.35
TA = 85 C
Quiescent Current (mA)
5
0.30
TA = 25 C
R DSON ()
4.5
0.25
TA = -40 C
4
0.20
3.5 3 2.5
0.15
3
3.5
4
VIN (V)
4.5
5
5.5
6
0.10 2.7
3.2
3.7
VIN (V)
4.2
4.7
5.2
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SC196A
POWER MANAGEMENT Typical Characteristics (Cont.)
N-Channel RDSON vs. Input Voltage
0.22
PRELIMINARY
Switching Frequency vs. Temperature
1050 1040
VIN = 5.5V VIN = 3.6V
0.20
Switching Frequency (kHz)
TA = 85 C
1030 1020 1010 1000 990 980 970 960
VIN = 2.7V
0.18
R DSON ()
0.16
TA = 25 C
0.14
TA = -40 C
0.12 0.10 2.7
3.2
3.7
4.2 VIN (V)
4.7
5.2
950 -50
-30
-10
10
30
TJ = (C)
50
70
90
110
130
100% Duty Cycle Mode
VOUT (50mV/div)
PSAVE Operation
VOUT (20mV/div) ILOAD (1A/div) IL (200mA/div) VLX (2V/div) VLX (5V/div)
Time (400ns/div) Condition VIN=2.6V, VOUT=1.8V, lOUT=.A, SYNC/PWM=1.15MHz ext clock
Time (1us/div) Condition VIN=3.6V, VOUT=1.8V, lOUT=150mA, SYNC/PWM=GND
PWM Operation
VOUT (10mV/div)
PSAVE Start-up
EN (2V/div)
IL (200mA/div) VLX (5V/div)
VOUT (1V/div)
lIN (100mA/div) Time (1us/div) Condition VIN=3.6V, VOUT=1.8V, lOUT=150mA, SYNC/PWM=VIN
Time (200us/div) Condition VIN=3.6V, VOUT=1.8V, lOUT=0mA, SYNC/PWM=GND
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SC196A
POWER MANAGEMENT Typical Characteristics (Cont.)
PWM Start-up
EN (2V/div) VOUT (1V/div) VOUT (100mV/div)
PRELIMINARY
Load Transient Response PWM
lIN (100mA/div) Time (200us/div) Condition VIN=3.6V, VOUT=1.8V, lOUT=0mA, SYNC/PWM=VIN Time (100us/div) Condition VIN=3.6V, VOUT=1.8V, lOUT=A to 00mA, SYNC/PWM=VIN
ILOAD (1A/div)
Load Transient Response PSAVE
VID Code Change
VID0 (2V/div) VOUT (100mV/div) VOUT (200mV/div)
ILOAD (1A/div)
Time (100us/div) Condition VIN=3.6V, VOUT=1.8V, lOUT=A to 00 mA, SYNC/PWM=GND
Time (400us/div) Condition VIN=3.6V, VOUT=1.8V to 1.5V, lOUT=A, SYNC/PWM=VIN
2006 Semtech Corp.
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SC196A
POWER MANAGEMENT Applications Circuits
VOUT = 1.05V with PSAVE and 100% Duty Cycle
VIN 2.7V to 5.5V VIN EN CIN 10 F VID0 VID1 MODE
PRELIMINARY
SC196A
L1 LX VOUT PGND GND 4. 7 H COUT 22F
VOUT 1.05V 1.5A
SYNC/PWM
Mobile Voltage Positioning for Reduced System Dissipation in "Sleep" Modes
VIN 2.7V to 5.5V VOUT 1.8V norm
CIN 10F
Sleep Flag from uProc Changes voltage From 1.8V to 1.2V
SC196A VIN EN SYNC/PWM VID0 VID1 MODE
L1 LX VOUT PGND GND 4.7H
COUT 22F
VOUT 1.2V sleep
VOUT = 1.0V with Forced PWM and no 100% Duty Cycle
VIN 2.7V to 5.5V
CIN 10F
SC196A VIN EN SYNC/PWM VID0 VID1 MODE
L1 LX VOUT PGND GND 4.7H COUT 10F
VOUT 1V 1.5A
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REVISIONS
SC196A
PRELIMINARY
DATE APPR.
POWER MANAGEMENT Outline Drawing - MLP-0
REV
DESCRIPTION
A
E
B
DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX
A A1 A2 b C D E e L N aaa bbb .031 .039 .000 .002 (.008) .007 .009 .011 .074 .079 .083 .042 .048 .052 .114 .118 .122 .020 BSC .012 .016 .020 10 .003 .004 0.80 1.00 0.00 0.05 (0.20) 0.18 0.23 0.30 1.87 2.02 2.12 1.06 1.21 1.31 2.90 3.00 3.10 0.50 BSC 0.30 0.40 0.50 10 0.08 0.10
E PIN 1 INDICATOR (LASER MARK)
A aaa C C 1 LxN 2 A1 C
SEATING PLANE
A2
D
N e bxN bbb CAB
NOTES:
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS TERMINALS.
DRAWN: CHKD:
C. WITHERSPOON TOM GREENSMITH
TITLE:
2006 Semtech Corp.
REF DWG: PKGML00033 REV E, VNJR-3 DATE: SCALE: 05/06/04 N/A
PACKAGE OUTLINE DRAWING MLPD, 3X3mm, 10 LEAD EP 2.02 X 1.21mm POD-3X3MLPD10-EP1
REV:
DRAWING NO:
6
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SC196A
POWER MANAGEMENT Land Pattern - MLP-0
K
PRELIMINARY
DIM
G Y Z C G H K P X Y Z
DIMENSIONS INCHES MILLIMETERS
(.112) .075 .055 .087 .020 .012 .037 .150 (2.85) 1.90 1.40 2.20 0.50 0.30 0.95 3.80
(C)
H
X P
NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET.
DRAWN: CHKD:
C. WITHERSPOON TOM GREENSMITH
TITLE:
REF DWG: POD-3X3MLPD10-EP1 DATE: 05/06/04 SCALE: N/A
LAND PATTERN DRAWING MLPD, 3X3mm, 10 LEAD EP 2.02 X 1.21mm LP-3X3MLPD10-EP1
REV:
DRAWING NO:
1
Contact Information
Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805) 498-2111 Fax: (805) 498-3804
www.semtech.com
2006 Semtech Corp. 7 www.semtech.com

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