LTC3528
LTC3528B

RECOMMENDED FOR NEW DESIGNS

1A, 1MHz Synchronous Step-Up DC/DC Converters in 3mm x 2mm 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
  • 1.6V to 5.25V VOUT Range
  • Up to 94% Efficiency
  • Output Disconnect
  • 1MHz Fixed Frequency Operation
  • VIN > VOUT Operation
  • Integrated Soft-Start
  • Current Mode Control with Internal Compensation
  • Burst Mode® Operation with 12µA Quiescent Current (LTC3528)
  • Low Noise PWM Operation (LTC3528B)
  • Internal Synchronous Rectier
  • Logic Controlled Shutdown: <1µA
  • Anti-Ringing Control
  • Low Prole (3mm x 2mm x 0.75mm) DFN Package

The LTC3528/LTC3528B are synchronous, fixed frequency step-up DC/DC converters with output disconnect. High efficiency synchronous rectification, in addition to a 700mV start-up voltage and operation down to 500mV once started, provides longer run-time for single or multiple cell battery-powered products.

A switching frequency of 1MHz minimizes solution foot- print by allowing the use of tiny, low prole inductors and ceramic capacitors. The current mode PWM is internally compensated, simplifying the design process. The LTC3528 enters Burst Mode operation at light loads, while the LTC3528B features continuous switching 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/LTC3528B are offered in an 8-lead 3mm x 2mm x 0.75mm DFN package.

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

Applications

  • Medical Instruments
  • Flash-Based MP3 Players
  • Noise Canceling Headphones
  • Wireless Mice
  • Bluetooth Headsets
LTC3528
LTC3528B
1A, 1MHz Synchronous Step-Up DC/DC Converters in 3mm x 2mm DFN
Efficiency and Power Loss Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Data Sheet

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

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Software Resources

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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.

Evaluation Kits

eval board
schematic 1
DC1211A-B

LTC3528BEDDB | 1A, 1MHz Synchronous Boost Converter with Output Disconnect in DFN PWM Mode

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Product Details

DC1211A-B: Demo Board for the LTC3528/LTC3528B 1A, 1MHz Synchronous Step-Up DC/DC Converters in 3mm × 2mm DFN.

eval board
schematic 2
schematic 3
schematic 4
schematic 5
DC1211A-A

LTC3528EDDB | 1A, 1MHz Synchronous Boost Converter with Output Disconnect in DFN Auto Burst Mode

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Product Details

Demonstration circuits 1211A-A and 1211A-B are high efficiency synchronous boost converters capable of operating with an input voltage range from 0.7V to 5.5V. The 3 × 2 mm DFN thermally enhanced package with a 1MHz switching frequency and the 1A internal switches provide a very tiny overall solution. The LTC3528/LTC3528B also features output disconnect and the input voltage can be greater or less than the output voltage.
DC1211A-B
LTC3528BEDDB | 1A, 1MHz Synchronous Boost Converter with Output Disconnect in DFN PWM Mode
DC1211A-A - Schematic
DC1211A-A
LTC3528EDDB | 1A, 1MHz Synchronous Boost Converter with Output Disconnect in DFN Auto Burst Mode
DC1211A-A Evaluation Board DC1211A-A Evaluation Board - Top View DC1211A-A Evaluation Board - Bottom View DC1211A-A - Schematic

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