Overview

Features and Benefits

  • Start-Up at 0.7V Typical, 0.88V Guaranteed
  • Up to 95% Efficiency
  • Output Disconnect and Inrush Current Limit
  • 3V Fixed Output Voltage
  • Delivers 65mA at 3V from a 1V Input or 160mA from a 1.8V Input
  • Burst Mode® Operation: IQ = 7μA
  • VIN: 0.5V to 4.5V
  • Only Three External Components
  • VIN > VOUT Operation
  • <1μA Shutdown Current
  • Anti-Ringing Control
  • Short-Circuit and Overtemperature Protection
  • Tiny 6-Pin SC70 Package

Product Details

The LTC3525L-3 is a high efficiency synchronous step-up DC/DC converter with output disconnect that can start up with an input as low as 0.7V. It offers a compact, high efficiency alternative to charge pumps in single cell or dual cell alkaline applications. Only three small external components are required. The LTC3525L-3 generates a fixed 3V output voltage.

The device includes a 0.5Ω N-channel MOSFET switch and a 0.85Ω P-channel synchronous rectifier. Peak switch current ranges from 150mA to 400mA, depending on load, providing enhanced efficiency. Quiescent current is an ultralow 7μA, maximizing battery life in portable applications.

Other features include <1μA shutdown current, anti-ringing control and thermal shutdown. The LTC3525L-3 is available in a tiny 6-pin SC70 package.

Vout Min Startup Voltage Features
LTC3525-3/3.3/5 3V/3.3V/5V 1V Output Disconnect
LTC3525D-3.3 3.3V 0.85V Pass Through Mode
LTC3525L-3 3V 0.85V Output Disconnect

Applications

  • MP3 Players
  • Portable Instruments
  • Glucose Meters
  • Digital Cameras

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

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.

LTspice

Models for the following parts are available in LTspice:

LTC3525-3
LTC3525-3.3
LTC3525-5

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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