LTC3400BES6

Conv DC-DC 0.5V to 6V Synchronous Step Up Single-Out 2.5V to 5V 0.85A Micropower 6Pin TSOT-23

DESCRIPTION

The LTC®3400/LTC3400B are synchronous, fixed frequency, step-up DC/DC converters delivering high efficiency in a 6-lead ThinSOT package. Capable of supplying 3.3V at 100mA from a single AA cell input, the devices contain an internal NMOS switch and PMOS synchronous rectifier.

A switching frequency of 1.2MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. The LTC3400 features automatic shifting to power saving Burst Mode operation at light loads, while the LTC3400B features continuous switching at light loads. Antiringing control circuitry reduces EMI concerns by damping the inductor in discontinuous mode, and the devices feature low shutdown current of under 1µA.

Both devices are available in the low profile 1mm ThinSOT package.

FEATURES

■ Up to 92% Efficiency

■ Generates 3.3V at 100mA from a Single AA Cell

■ Low Start-Up Voltage: 0.85V

■ 1.2MHz Fixed Frequency Switching

■ Internal Synchronous Rectifier

■ 2.5V to 5V Output Range

■ Automatic Burst Mode® Operation LTC3400

■ Continuous Switching at Light Loads LTC3400B

■ Logic Controlled Shutdown <1µA

■ Antiringing Control Minimizes EMI

■ Tiny External Components

■ Low Profile 1mm ThinSOTTM Package

APPLICATIONS

■ Pagers

■ MP3 Players

■ Digital Cameras

■ LCD Bias Supplies

■ Handheld Instruments

■ Wireless Handsets

■ GPS Receivers