LTC3401

PRODUCTION

1A, 3MHz Micropower Synchronous Boost Converter

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Overview

  • 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: 38µA (Burst Mode® Operation)
  • 2.6V to 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 MSOP Package

The LTC3401 is a high efficiency, fixed frequency, step-up 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.

Applications

  • Pagers
  • Handheld Instruments
  • Cordless Phones
  • Wireless Handsets
  • GPS Receivers
  • Battery Backup
  • CCFL Backlights
LTC3401
1A, 3MHz Micropower Synchronous Boost Converter
All-Ceramic-Capacitor 2-Cell to 3.3V at 500mA Step-Up Converter Efficiency Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Design Note 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 1
LTC3528
LTC3528B
1A, 1MHz Synchronous Step-Up DC/DC Converters in 3mm x 2mm DFN
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3401
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC308A

LTC3401EMS | 2 Circuits, 1W & 3W Synchronous Boost Regulator, 1V to 4.5V Input, 3.3V or 5V @ 0.2A, 3.3V or 5V @ 0.6A

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Product Details

DC308A: Demo Board for LTC3401 1A, 3MHz Micropower Synchronous Boost Converter.
DC308A
LTC3401EMS | 2 Circuits, 1W & 3W Synchronous Boost Regulator, 1V to 4.5V Input, 3.3V or 5V @ 0.2A, 3.3V or 5V @ 0.6A
DC308A - Schematic

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