LINEAR LT3461 LT3461A Data Sheet
Summary
These high-efficiency step-up DC/DC converters are designed for compact and reliable power solutions. Featuring integrated Schottky rectifiers and operating over a wide input voltage range, they provide stable output voltages up to 38V with minimal noise. The manual provides comprehensive electrical specifications, performance curves, and operational guidelines covering various load requirements and temperature ranges. They are perfectly suited for sophisticated applications such as digital camera power supplies, medical diagnostic equipment, and TFT-LCD bias systems requiring high reliability.
Page 1 Text Content
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LT3461/LT3461A 1.3MHz/3MHz Step-Up
DC/DC Converters with Integrated Schottky in Thin SOT
FEATURES DESCRIPTIO Integrated Schottky Rectifier The LT®3461/LT3461A are general purpose fixed fre- Fixed Frequency 1.3MHz/3MHz Operation quency current mode step-up DC/DC converters. Both High Output Voltage: Up to 38V devices feature an integrated Schottky and a low VCESAT Low VCESAT Switch: 260m V at 250m A
switch allowing a small converter footprint and lower parts
12V at 70m A from 5V Input
cost. The LT3461 switches at 1.3MHz while the LT3461A
5V at 115m A from 3.3V Input
switches at 3MHz. These high switching frequencies en-
Wide Input Range: 2.5V to 16V
able the use of tiny, low cost and low height capacitors and
Uses Small Surface Mount Components
inductors. The constant switching frequency results in
Low Shutdown Current: <1µA
predictable output noise that is easy to filter, and the
Soft-Start
inductor based topology ensures an input free from switch-
Low Profile (1mm) SOT-23 (Thin SOTTM) Package
ing noise typically present with charge pump solutions. APPLICATIO S The high voltage switch in the LT3461/LT3461A is rated at
EF FI CI EN CY 40V making the device ideal for boost converters up to
Digital Cameras
CCD Bias Supply XDSL Power Supply
The LT3461/LT3461A are available in a low profile (1mm)
TFT-LCD Bias Supply
SOT-23 package.
Local 5V or 12V Supply
, LTC and LT are registered trademarks of Linear Technology Corporation.
Medical Diagnostic Equipment
Thin SOT is a trademark of Linear Technology Corporation.
Battery Backup
TYPICAL APPLICATIO 5V to 12V, 70m A Step-Up DC/DC Converter Efficiency
VIN 5V
VIN = 5V
SW VOUT C1 VIN VOUT 12V
1µF 70m A VIN = 3.3V
LT3461A 261k
OFF ON FBSHDN
3461 TA01a
LOAD CURRENT (m A) 3461 TAO1b
3461af
Page Summary Contents For LINEAR LT3461 LT3461A Data Sheet
Manual Details
| Brand | Linear |
|---|---|
| Pages | 8 |
| File Size | 146.55 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
What is the optimal operating temperature range for this device?
The specified operating ambient temperature range is -40°C to 85°C.
How does the switching frequency differ between models LT3461 and LT3461A?
LT3461 switches at 1.3MHz, while the LT3461A switches at 3MHz.
Is this device suitable for high voltage boost applications?
Yes, the high voltage switch is rated at 40V (max), making it ideal for boost converters up to 38V when boosting to 12V or higher.
Can I use this chip in low power standby mode?
The device offers very low shutdown current (<1µA) and a bias current of 50µA for the SHDN pin.