LT3461A

PRODUCTION

3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT

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Overview

  • Integrated Schottky Rectifier
  • Fixed Frequency 1.3MHz/3MHz Operation
  • High Output Voltage: Up to 38V
  • Low VCESAT Switch: 260mV at 250mA
  • 12V at 70mA from 5V Input
  • 5V at 115mA from 3.3V Input
  • Wide Input Range: 2.5V to 16V
  • Uses Small Surface Mount Components
  • Low Shutdown Current: <1µA
  • Soft-Start
  • Low Profile (1mm) SOT-23 (ThinSOTTM) Package

The LT3461/LT3461A are general purpose fixed frequency current mode step-up DC/DC converters. Both devices feature an integrated Schottky and a low VCESAT switch allowing a small converter footprint and lower parts cost. The LT3461 switches at 1.3MHz while the LT3461A switches at 3MHz. These high switching frequencies enable the use of tiny, low cost and low height capacitors and inductors. The constant switching frequency results in predictable output noise that is easy to filter, and the inductor based topology ensures an input free from switching noise typically present with charge pump solutions. The high voltage switch in the LT3461/LT3461A is rated at 40V making the device ideal for boost converters up to 38V.

The LT3461/LT3461A are available in a low profile (1mm) SOT-23 package.

  Switching Frequency
LT3461 1.3MHz
LT3461A 3MHz

Applications

  • Digital Cameras
  • CCD Bias Supply
  • XDSL Power Supply
  • TFT-LCD Bias Supply
  • Local 5V or 12V Supply
  • Medical Diagnostic Equipment
  • Battery Backup
LT3461A
3MHz Step-Up DC/DC Converters with Integrated Schottky in ThinSOT
5V to 12V, 70mA Step-Up DC/DC Converter Efficiency Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

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

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LT3461
  • LT3461A
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
DC627A-B

LT3461AES6 Demo Board | 3MHz, VIN = 3V to 6V, VOUT = 12V, (at VIN = 5V, IOUT = 70mA)

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Product Details

Demonstration circuit 627 features the LT3461/LT3461A in a 12V output boost converter which operates from an input voltage of 3V to 6V. The DC627A-A is for the 1.3MHz switching LT3461, and the DC627A-B is for the 3MHz switching LT3461A. For both boards, the maximum output current is 70mA when powered from a 5.0V input and 40mA when powered from a 3.3V input.
DC627A-B
LT3461AES6 Demo Board | 3MHz, VIN = 3V to 6V, VOUT = 12V, (at VIN = 5V, IOUT = 70mA)
DC627A-A - Schematic

Latest Discussions

37 Weeks Ago
Unstable performance of LT3461A
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