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LTC3401

Linear Technology
Part Number LTC3401
Manufacturer Linear Technology
Description Micropower Synchronous Boost Converter
Published Mar 27, 2005
Detailed Description U U FEATURES ■ Synchronous Rectification: Up to 97% Efficiency ■ 1A Switch Current Rating ■ Fixed Frequency Operation U...
Datasheet PDF File LTC3401 PDF File

LTC3401
LTC3401

Overview
U U FEATURES ■ Synchronous Rectification: Up to 97% Efficiency ■ 1A Switch Current Rating ■ Fixed Frequency Operation Up to 3MHz ■ Wide Input Range: 0.
5V to 5.
5V (Operating) ■ Very Low Quiescent Current: 38μA (Burst Mode® Operation) ■ 2.
6V to 5.
5V Adjustable Output Voltage ■ 0.
85V (Typ) Start-Up Voltage ■ No External Schottky Diode Required (VOUT < 4.
3V) ■ Synchronizable Switching Frequency ■ Burst Mode Enable Control ■ Antiringing Control Reduces Switching Noise ■ PGOOD Output ■ OPTI-LOOP® Compensation ■ Very Low Shutdown Current: < 1μA ■ Small 10-Pin MSUOP Package APPLICATIO S ■ Pagers ■ Handheld Instruments ■ Cordless Phones ■ Wireless Handsets ■ GPS Receivers ■ Battery Backup ■ CCFL Backlights LTC3401 1A, 3MHz Micropower Synchronous Boost Converter DESCRIPTIO The LTC®3401 is a high efficiency, fixed frequency, stepup DC/DC converter that operates from an input voltage below 1V.
The device includes a 0.
16Ω N-channel MOSFET switch and a 0.
18Ω P-channel synchronous rectifier.
Switching frequencies up to 3MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock.
An external Schottky diode is optional but will slightly improve efficiency.
Quiescent current is only 38μA in Burst Mode operation, maximizing battery life in portable applications.
Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high.
If the MODE/SYNC pin has either a clock or is driven low, then fixed frequency switching is enabled.
Other features include 1μA shutdown, antiringing control, open-drain power good output, thermal shutdown and current limit.
The LTC3401 is available in the 10-lead thermally enhanced MSOP package.
Higher current applications should use the 2A rated LTC3402 synchronous boost converter.
Applications that require VOUT < 2.
6V should use the LTC3423.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode and OPTI-LOOP are registered trademarks of Linear...


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