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Details, datasheet, quote on part number:LM3352-2.5
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| Part: | LM3352-2.5 |
| Category: | Power Management => Regulators => Switching Regulators => Switched Capacitor Converters |
| Description: | LM3352 - Regulated 200mA Buck-boost Switched Capacitor DC/DC Converter, Package: Evaluation Board, Pin Nb=- |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM3352-2.5 datasheet File size : 526 kB |
| Request For quote: | Find where to buy LM3352-2.5
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Datasheet text preview:
LM3352 Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter
September 1999
LM3352 Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter
General Description
The LM3352 is a CMOS switched capacitor DC/DC converter that produces a regulated output voltage by automatically stepping up (boost) or stepping down (buck) the input voltage. It accepts an input voltage between 2.5V and 5.5V. The LM3352 is available in three standard output voltage versions: 2.5V, 3.0V and 3.3V. If other output voltage options between 1.8V and 4.0V are desired, please contact your National Semiconductor representative. The LM3352's proprietary buck-boost architecture enables up to 200 mA of load current at an average efficiency greater than 80%. Typical operating current is only 400 µA and the typical shutdown current is only 2.5 µA. The LM3352 is available in a 16-pin TSSOP package. This package has a maximum height of only 1.1 mm. The high efficiency of the LM3352, low operating and shutdown currents, small package size, and the small size of the overall solution make this device ideal for battery powered, portable, and hand-held applications. n Custom output voltages available from 1.8V to 4.0V in 100 mV increments n 2.5V to 5.5V input voltage n Up to 200 mA output current n > 80% average efficiency n Uses few, low-cost external components n Very small solution size n 400 µA typical operating current n 2.5 µA typical shutdown current n 1 MHz switching frequency (typical) n Architecture and control methods provide high load current and good efficiency n TSSOP-16 package n Over-temperature protection
Applications
n 1-cell Lilon battery-operated equipment including PDAs, hand-held PCs, cellular phones n Flat panel displays n Hand-held instruments n NiCd, NiMH, or alkaline battery powered systems n 3.3V to 2.5V and 5.0V to 3.3V conversion
Features
n Regulated VOUT with ± 3% accuracy n Standard output voltage options: 2.5V, 3.0V and 3.3V
Typical Operating Circuit
DS101037-1
© 2001 National Semiconductor Corporation
DS101037
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LM3352
Connection Diagram
DS101037-2
Top View TSSOP-16 Pin Package See NS Package Number MTC16
Ordering Information
Order Number LM3352MTCX-2.5 LM3352MTC-2.5 LM3352MTCX-3.0 LM3352MTC-3.0 LM3352MTCX-3.3 LM3352MTC-3.3 Package Type TSSOP-16 TSSOP-16 TSSOP-16 TSSOP-16 TSSOP-16 TSSOP-16 NSC Package Drawing MTC16 MTC16 MTC16 MTC16 MTC16 MTC16 Supplied As 2.5k Units, Tape and Reel 94 Units, Rail 2.5k Units, Tape and Reel 94 Units, Rail 2.5k Units, Tape and Reel 94 Units, Rail
Pin Description
Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name GND C3- C3+ C2- C2+ C1- C1+ VOUT GND VIN NC GND SD GND CFIL GND Ground* Negative Terminal for C3 Positive Terminal for C3 Negative Terminal for C2 Positive Terminal for C2 Negative Terminal for C1 Positive Terminal for C1 Regulated Output Voltage Ground* Input Supply Voltage This pin must be left unconnected. Ground* Active Low CMOS Logic-Level Shutdown Input Ground* Filter Capacitor; A 1 µF ceramic capacitor is suggested. Ground* Function
*All GND pins of the LM3352 must be connected to the same ground.
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LM3352
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VOUT Pin All Other Pins Power Dissipation (TA = 25°C) (Note 2) TJMAX (Note 2) JA (Note 2) Storage Temperature -0.5V to 4.5V -0.5V to 5.6V 700 mW 150°C 150°C/W -65°C to +150°C
Lead Temperature (Soldering, 5 sec.) ESD Rating (Note 3) human body model machine model
260°C 2 kV 100V
Operating Ratings
Input Voltage (VIN) Output Voltage (VOUT) Ambient Temperature (TA) (Note 2) Junction Temperature (T J) (Note 2) 2.5V to 5.5V 1.8V to 4.0V -40°C to +85°C -40°C to +125°C
Electrical Characteristics
Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: C1 = C2 = C3 = 0.33 µF; CIN = 15 µF; COUT = 33 µF; VIN = 3.5V. Parameter LM3352-2.5 Output Voltage (V
OUT)
Conditions VIN = 3.5V; I = 100 mA
Min 2.463 2.425/2.400 2.425/2.400 2.425/2.400
Typ 2.5 2.5 2.5 2.5 85 75 75
Max 2.537 2.575/2.600 2.575/2.600 2.575/2.600
Units
LOAD
2.8V < VIN < 5.5V; 1 mA < ILOAD < 100 mA 3.6V < VIN < 4.9V; 1 mA < ILOAD < 200 mA 4.9V < VIN < 5.5V; 1 mA < ILOAD < 175 mA Efficiency Output Voltage Ripple (Peak-to-Peak) LM3352-3.0 Output Voltage (V
OUT)
V
ILOAD = 15 mA ILOAD = 150 mA, VIN = 4.0V ILOAD = 50 mA C OUT = 33 µF tantalum VIN = 3.5V; I = 100 mA 2.955 2.910/2.880 2.910/2.880
% mVP-P
LOAD
3.0 3.0 3.0 80 75 75
3.045 3.090/3.120 3.090/3.120 % mVP-P V
2.5V < VIN < 5.5V; 1 mA < ILOAD < 100 mA 3.8V < VIN < 5.5V; 1 mA < ILOAD < 200 mA Efficiency Output Voltage Ripple (Peak-to-Peak) LM3352-3.3 Output Voltage (V
OUT)
ILOAD = 15 mA ILOAD = 150 mA, VIN = 4.0V ILOAD = 50 mA C OUT = 33 µF tantalum VIN = 3.5V; I = 100 mA 3.251 3.201/3.168 3.201/3.168
LOAD
3.3 3.3 3.3 90 80 75
3.349 3.399/3.432 3.399/3.432 % mVP-P V
2.5V < VIN < 5.5V; 1 mA < ILOAD < 100 mA 4.0V < VIN < 5.5V; 1 mA < ILOAD < 200 mA Efficiency Output Voltage Ripple (Peak-to-Peak) Operating Quiescent Current Shutdown Quiescent Current Switching Frequency SD Input Threshold Low 2.5V < VIN < 5.5V ILOAD = 15 mA ILOAD = 150 mA, VIN = 4.0V ILOAD = 50 mA C OUT = 33 µF tantalum Measured at Pin VIN; I LOAD = 0A (Note 4) SD Pin at 0V (Note 5)
LM3352-ALL OUTPUT VOLTAGE VERSIONS 400 2.5 0.65 1 500 5 1.35 0.2 VIN µA µA MHz V
3
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