7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator

The LM5017 is a 100-V, 600-mA synchronous stepdown regulator with integrated high

side and low side MOSFETs. The constant on-time (COT) control scheme employed in the

LM5017 requires no loop compensation, provides excellent transient response, and

enables very high step-down ratios. The on-time varies inversely with the input

voltage resulting in nearly constant frequency over the input voltage range. A high

voltage startup regulator provides bias power for internal operation of the IC and

for integrated gate drivers.

A peak current limit circuit protects against overload conditions. The undervoltage

lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be

independently programmed. Other protection features include thermal shutdown and

bias supply undervoltage lockout (VCC UVLO).

The LM5017 device is available in WSON-8 and HSOP PowerPAD-8 plastic packages.