DESCRIPTION

The LTC®3703 is a synchronous step-down switching regulator controller that can directly step down voltages from up to 100V, making it ideal for telecom and automotive applications. The LTC3703 drives external N-channel MOSFETs using a constant frequency (up to 600kHz), voltage mode architecture.

FEATURES

■ High Voltage Operation: Up to 100V

■ Large 1Ω Gate Drivers

■ No Current Sense Resistor Required

■ Step-Up or Step-Down DC/DC Converter

■ Dual N-Channel MOSFET Synchronous Drive

■ Excellent Line and Load Transient Response

■ Programmable Constant Frequency: 100kHz to 600kHz

■ ±1 Reference Accuracy

■ Synchronizable up to 600kHz

■ Selectable Pulse-Skip Mode Operation

■ Low Shutdown Current: 50µA Typ

■ Programmable Current Limit

■ Undervoltage Lockout

■ Programmable Soft-Start

■ 16-Pin Narrow SSOP and 28-Pin SSOP Packages

APPLICATIONS

■ 48V Telecom and Base Station Power Supplies

■ Networking Equipment, Servers

■ Automotive and Industrial Control