LTC3528-2

RECOMMENDED FOR NEW DESIGNS

1A, 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 3mm DFN

Data Sheet Product Selection Table
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Overview

  • Delivers 3.3V at 200mA from a Single Alkaline/NiMH Cell or 3.3V at 400mA from Two Cells
  • VIN Start-Up Voltage: 700mV
  • 0.50V to 5.5V Input Range
  • 1.6V to 5.25V VOUT Range
  • Up to 94% Efficiency
  • Output Disconnect
  • 2MHz Fixed Frequency Operation
  • VIN > VOUT Operation
  • Integrated Soft-Start
  • Current Mode Control with Internal Compensation
  • Burst Mode® Operation with 12μA Quiescent Current
  • Internal Synchronous Rectifier
  • Logic Controlled Shutdown: <1μA
  • Anti-Ringing Control
  • Low Profile (2mm × 3mm × 0.75mm) DFN Package

The LTC3528-2 is a synchronous, fixed frequency step-up DC/DC converter with output disconnect. High efficiency synchronous rectification, in addition to a 700mV startup voltage and operation down to 500mV once started, provides longer run-time for single or multiple cell battery-powered products.

A switching frequency of 2MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM is internally compensated, simplifying the design process. The LTC3528-2 enters Burst Mode operation at light loads. Anti-ringing circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current, open-drain power good output, short-circuit protection and thermal overload protection.

The LTC3528-2 is offered in an 8-lead 2mm × 3mm × 0.75mm DFN package.

Frequency Burst Mode
LTC3528 1MHz Yes
LTC3528B 1MHz No
LTC3528-2 2MHz Yes
LTC3528B-2 2MHz No

Applications

  • Medical Instruments
  • Noise Canceling Headphones
  • Wireless Mice
  • Bluetooth Headsets
LTC3528-2
1A, 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 3mm DFN
Efficiency and Power Loss Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

Data Sheet

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC3528
  • LTC3528-2
  • LTC3528B
  • LTC3528B-2
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.

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