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LTC3400

Linear Technology
Part Number LTC3400
Manufacturer Linear Technology
Description Micropower Synchronous Boost Converter
Published Mar 27, 2005
Detailed Description U U LTC3400/LTC3400B 600mA, 1.2MHz Micropower Synchronous Boost Converter in ThinSOT FEATURES s Up to 92% Efficiency s...
Datasheet PDF File LTC3400 PDF File

LTC3400
LTC3400


Overview
U U LTC3400/LTC3400B 600mA, 1.
2MHz Micropower Synchronous Boost Converter in ThinSOT FEATURES s Up to 92% Efficiency s Generates 3.
3V at 100mA from a Single AA Cell s Low Start-Up Voltage: 0.
85V s 1.
2MHz Fixed Frequency Switching s Internal Synchronous Rectifier s 2.
5V to 5V Output Range s Automatic Burst Mode® Operation (LTC3400) s Continuous Switching at Light Loads (LTC3400B) s Logic Controlled Shutdown (< 1µA) s Antiringing Control Minimizes EMI s Tiny External Components s Low Profile (1mm) SOT-23 Package U APPLICATIO S s Pagers s MP3 Players s Digital Cameras s LCD Bias Supplies s Handheld Instruments s Wireless Handsets s GPS Receivers DESCRIPTIO The LTC®3400/LTC3400B are synchronous, fixed frequency, step-up DC/DC converters delivering high efficiency in a 6-lead ThinSOT™ package.
Capable of supplying 3.
3V at 100mA from a single AA cell input, the devices contain an internal NMOS switch and PMOS synchronous rectifier.
A switching frequency of 1.
2MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors.
The current mode PWM design is internally compensated, reducing external parts count.
The LTC3400 features automatic shifting to power saving Burst Mode operation at light loads, while the LTC3400B features continuous switching at light loads.
Antiringing control circuitry reduces EMI concerns by damping the inductor in discontinuous mode, and the devices feature low shutdown current of under 1µA.
Both devices are available in the low profile (1mm) SOT-23 package.
, LTC, LT and Burst Mode are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO + SINGLE AA CELL L1 4.
7µH C1 4.
7µF 1 SW 6 5 VIN VOUT OFF ON LTC3400 4 3 SHDN FB GND 2 C1, C2: TAIYO-YUDEN X5R EMK316BJ475ML L1: COILCRAFT DO160C-472 R1 1.
02M 1% R2 604k 1% VOUT 3.
3V 100mA C2 4.
7µF 3400 F01 Figure 1.
Single Cell to 3.
3V Synchronous Boost Converter EFFIC...


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