General Description
The LM5017 is a 100V, 600mA synchronous step-down reg-
ulator 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 low 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 condi-
tions. The undervoltage lockout (UVLO) circuit allows the
input undervoltage threshold and hysteresis to be indepen-
dently programmed. Other protection features include ther-
mal shutdown and bias supply undervoltage lockout (V CC
UVLO).
The LM5017 is available in LLP-8 and PSOP-8 plastic pack-
ages.
