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LTC3401

Features: Synchronous Rectification: Up to 97% Efficiency1A Switch Current RatingFixed Frequency Operation Up to 3MHzWide Input Range: 0.5V to 5V (Operating)Very Low Quiescent Current: 38mA (Burst ModeTM Operation)2.6V to 5V Adjustable Output Voltage0.85V (Typ) Start-Up VoltageNo External Schottky...

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SeekIC No. : 004402196 Detail

LTC3401: Features: Synchronous Rectification: Up to 97% Efficiency1A Switch Current RatingFixed Frequency Operation Up to 3MHzWide Input Range: 0.5V to 5V (Operating)Very Low Quiescent Current: 38mA (Burst M...

LTC3401 Data Sheet

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Part Number:
LTC3401
Supply Ability:
5000

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  • 1~5000
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Product Details

Description



Features:

 Synchronous Rectification: Up to 97% Efficiency
 1A Switch Current Rating
 Fixed Frequency Operation Up to 3MHz
 Wide Input Range: 0.5V to 5V (Operating)
 Very Low Quiescent Current: 38mA (Burst ModeTM Operation)
 2.6V to 5V Adjustable Output Voltage
 0.85V (Typ) Start-Up Voltage
 No External Schottky Diode Required
 Synchronizable Switching Frequency
 Burst Mode Enable Control
 Antiringing Control Reduces Switching Noise
 PGOOD Output
 OPTI-LOOPTM Compensation
 Very Low Shutdown Current: <1mA
 Small 10-Pin MSOP Package


Application

 Pagers
 Handheld Instruments
 Cordless Phones
 Wireless Handsets
 GPS Receivers
 Battery Backup


Pinout

Connection Diagram


Specifications

VIN, VOUT Voltages ....................................................................... 0.5V to 6V
SW Voltage ................................................................................... 0.5V to 6V
VC, Rt, FB, MODE, SHDN Voltages ................................ 0.5V to (VOUT + 0.3V)
PGOOD Voltage ............................................................................. 0.5V to 6V
Operating Temperature Range (Note 2) ................................... 40°C to 85°C
Storage Temperature Range ................................................... 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................................................... 300°C


Description

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 0.16W N-channel MOSFET switch and a 0.18W 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 of LTC3401 is only 38mA 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 a 1mA 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.




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