LTC3528B-2 - 1A, 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 3mm DFN

The LTC3528B-2 is a synchronous, ﬁxed frequency step-up DC/DC converter 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 2MHz minimizes solution foot- print by allowing the use of tiny, low proﬁle inductors and ceramic capacitors. The current mode PWM is internally compensated, simplifying the design process. The LTC3528B-2 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 LTC3528B-2 is offered in an 8-lead 2mm × 3mm × 0.75mm DFN package.

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
Low Noise PWM Operation
Internal Synchronous Rectiﬁer
Logic Controlled Shutdown: <1μA
Anti-Ringing Control
Low Proﬁle (2mm × 3mm × 0.75mm) DFN Package