DESCRIPTION
The LT ®1616 is a current mode PWM step-down DC/DC converter with internal 0.6A power switch, packaged in a tiny 6-lead SOT-23. The wide input range of 3.6V to 25V makes the LT1616 suitable for regulating a wide variety of power sources, from 4-cell batteries and 5V logic rails to unregulated wall transformers and lead-acid batteries. Its high operating frequency allows the use of tiny, low cost inductors and ceramic capacitors. With its internal compensation eliminating additional components, a complete 400mA step-down regulator fits onto 0.15 square inches of PC board area.

FEATURES
■ Wide Input Range: 3.6V to 25V
■ 5V at 400mA from 7V to 25V Input
■ 3.3V at 400mA from 4.7V to 25V Input
■ Fixed Frequency 1.4MHz Operation
■ Uses Tiny Capacitors and Inductors
■ Internally Compensated
■ Low Shutdown Current: <1µA
■ Low VCESAT Switch: 220mV at 300mA
■ Tiny 6-Lead SOT-23 Package

APPLICATIONS
■ Wall Transformer Regulation
■ Local Logic Supply Conversion:
   12V to 5V
   12V or 5V to 3.3V, 2.5V or 1.8V
■ Distributed Supply Regulation
■ Digital Cameras
■ Battery-Powered Equipment