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

Datasheet

Documentation

Features

Delivers 3.3V at 200mA from a Single Alkaline/ NiMH Cell or 3.3V at 400mA from Two Cells
V_IN Start-Up Voltage: 700mV
0.50V to 5.5V Input Range
1.6V to 5.25V V_OUT Range
Up to 94% Efficiency
Output Disconnect
2MHz Fixed Frequency Operation
V_IN > V_OUT 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

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

3x2 DFN-8

Order Info

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)^*
LTC3528BEDDB#PBF	DFN	8	E	$2.79
LTC3528BEDDB#TRMPBF	DFN	8	E	$2.79	$2.00
LTC3528BEDDB#TRPBF	DFN	8	E	$2.79	$1.95
LTC3528BEDDB-2#PBF	DFN	8	E	$2.79
LTC3528BEDDB-2#TRMPBF	DFN	8	E	$2.79	$2.00
LTC3528BEDDB-2#TRPBF	DFN	8	E	$2.79	$1.95
LTC3528EDDB#PBF	DFN	8	E	$2.79
LTC3528EDDB#TRMPBF	DFN	8	E	$2.79	$2.00
LTC3528EDDB#TRPBF	DFN	8	E	$2.79	$1.95
LTC3528EDDB-2#PBF	DFN	8	E	$2.79
LTC3528EDDB-2#TRMPBF	DFN	8	E	$2.79	$2.00
LTC3528EDDB-2#TRPBF	DFN	8	E	$2.79	$1.95

^* 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.