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

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, short-circuit 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

Applications

* Medical Instruments

* 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

* VIN > VOUT Operation