DESCRIPTION
The LT®1939 is a current mode PWM step-down DC/DC converter with an internal 2.3A switch. The wide input range of 3V to 25V makes the LT1939 suitable for regulating power from a wide variety of sources, including automotive batteries, industrial supplies and unregulated wall adapters.

FEATURES
■ Wide Input Range: 3V to 25V
■ Short-Circuit Protected Over Full Input Range
■ 2A Output Current Capability
■ Adjustable/Synchronizable Fixed Frequency
   Operation from 250kHz to 2.2MHz
■ Soft-Start/Tracking Capability
■ Output Adjustable Down to 0.8V
■ Adjustable Linear Regulator/Driver with 13mA
   Output Capability
■ Power Good Comparator with Complementary
   Outputs
■ Low Shutdown Current: 12μA
■ Thermally Enhanced 3mm × 3mm DFN Package

APPLICATIONS
■ Automotive Battery Regulation
■ Industrial Control
■ Wall Transformer Regulation
■ Distributed Power Regulation