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.

Frequency

Features

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

* 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