High Input Voltage DC/DC Controller from Linear Tech

A power supply incorporating the LT3724 can convert a 4V to 60V input supply to a regulated output ranging from 1.23V to 36V in applications such as industrial, 12V and 42V automotive, heavy equipment, avionics and telecom power systems.

The LT3724 has a powerful on-board gate driver capable of slewing large N-channel MOSFETs quickly. It operates at a constant 200kHz switching frequency and safely powers a pre-biased load by not allowing negative currents to flow in the output inductor. Current mode control provides fast transient response, stable operation over a wide range of voltages, load currents, temperatures and capacitor values. Furthermore, the LT3724 has a high voltage on-board regulator to develop the IC bias voltage that can be back driven to increase efficiency. The operating efficiency when used as a step-down converter can be as high as 93%. Additional features include precision undervoltage lockout, 10uA shutdown current, programmable soft-start to control the turn-on time, a ±1.3% reference voltage accuracy over temp and thermal shutdown.