LTC3442

PRODUCTION

Micropower Synchronous Buck-Boost DC/DC Converter with Automatic Burst Mode Operation

Data Sheet Product Selection Table
Viewing:

Overview

  • Regulated Output with Input Voltages Above, Below, or Equal to the Output
  • Single Inductor, No Schottky Diodes Required
  • Manual or Programmable Automatic Burst Mode Operation
  • Programmable Average Input Current Limit
  • Up to 1.2A Continuous Output Current from a Single Lithium-Ion Cell
  • High Efficiency: Up to 95%
  • Output Disconnect in Shutdown
  • 2.4V to 5.5V Input Range
  • 2.4V to 5.25V Output Range
  • 35µA Quiescent Current in Burst Mode Operation
  • Programmable Frequency from 300kHz to 2MHz
  • <1µA Shutdown Current
  • Small, Thermally Enhanced 12-Lead (4mm × 3mm) DFN Package

The LTC3442 is a highly efficient, fixed frequency, Buck-Boost DC/DC converter, which operates from input voltages above, below, and equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for a single Lithium-Ion or multicell alkaline applications where the output voltage is within the battery voltage range.

The device includes two 0.10Ω N-channel MOSFET switches and two 0.10 Ohm P-channel switches. Operating frequency and average input current limit can each be programmed with an external resistor. Quiescent current is only 35µA in Burst Mode operation, maximizing battery life in portable applications. Automatic Burst Mode operation allows the user to program the load current for Burst Mode operation, or to control it manually.

Other features include 1µA shutdown current, programmable soft-start, peak current limit and thermal shutdown. The LTC3442 is available in a low profile, thermally enhanced 12-lead (4mm × 3mm × 0.75mm) DFN package.

Applications

  • PDA/'SMART' Phones
  • Handheld Computers
  • MP3 Players
  • Handheld Instruments
  • Digital Cameras
  • Wireless Handsets
  • USB Peripherals
LTC3442
Micropower Synchronous Buck-Boost DC/DC Converter with Automatic Burst Mode Operation
Efficiency vs VIN Product Package 1
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

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.

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3442
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
DC799A

LTC3442EDE Demo Board | Synchronous Buck-Boost, 2.4V ≤ VIN ≤ 5.25V, VOUT = 3.3V @ 1.2A

Buy Now View Details

Product Details

Demonstration Circuit 799 is a high efficiency synchronous Buck-Boost converter using the LTC3442. The input range is from 2.4V to 5.5V, making it ideal for single-cell Lithium-Ion or three-cell NiCd/NiMH battery applications. The output voltage is set at 3.3V. For 2.7V minimum input voltage, this converter can provide up to 1.2A load current. A different output voltage in the range of 2.4V to 5.25V can be obtained by changing one of the feedback resistors.
DC799A
LTC3442EDE Demo Board | Synchronous Buck-Boost, 2.4V ≤ VIN ≤ 5.25V, VOUT = 3.3V @ 1.2A
DC799A - Schematic

Latest Discussions

No discussions on LTC3442 yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed