Power Management Switching Regulator Step-Up (Boost) Regulators Micropower Boost
Power Management Switching Regulator Step-Up (Boost) Regulators Internal Power Switch Boost

LTC3528-2 - 1A, 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 3mm DFN

Features

  • 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

Typical Application

LTC3528-2 Typical Application
LTC3528-2 Typical Application

Description

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, shortcircuit 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

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTC3528EDDB-2#TRMPBF 3x2 DFN-8 DDB E 05-08-1702 Yes
LTC3528EDDB-2#TRPBF 3x2 DFN-8 DDB E 05-08-1702 Yes


LTC3528-2 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC3528EDDB-2#TRMPBF 3x2 DFN-8 E $2.79 $2.00 Yes
LTC3528EDDB-2#TRPBF 3x2 DFN-8 E $2.79 $1.95 Yes
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Medical Instruments
  • Noise Canceling Headphones
  • Wireless Mice
  • Bluetooth Headsets

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC3528
LTC3528-2
LTC3528B
LTC3528B-2

Technical Support