DESCRIPTION
The LT®1913 is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 25V. A high effi ciency 95m switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Shutdown reduces input supply current to less than 1μA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 91% of the programmed output voltage. The LT1913 is available in 10-Pin 3mm × 3mm DFN packages with exposed pads for low thermal resistance.

FEATURES
■ Wide Input Range: 3.6V to 25V
■ 3.5A Maximum Output Current
■ Adjustable Switching Frequency: 200kHz to 2.4MHz
■ Low Shutdown Current: IQ < 1μA
■ Integrated Boost Diode
■ Synchronizable Between 250kHz to 2MHz
■ Power Good Flag
■ Saturating Switch Design: 95m On-Resistance
■ 0.790V Feedback Reference Voltage
■ Output Voltage: 0.79V to 25V
■ Thermal Protection
■ Soft-Start Capability
■ Small 10-Pin (3mm × 3mm) DFN Packages

APPLICATIONS
■ Automotive Battery Regulation
■ Power for Portable Products
■ Distributed Supply Regulation
■ Industrial Supplies
■ Wall Transformer Regulation