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