The LM5160 family is a 65-V, 1.5-A synchronous step-down converter with integrated
high-side and low-side MOSFETs. The constant-on-time control scheme requires no loop compensation
and supports high step-down ratios with fast transient response. An internal feedback amplifier
maintains ±1% output voltage regulation over the entire operating temperature range. The on-time
varies inversely with input voltage resulting in nearly constant switching frequency. Peak and
valley current limit circuits protect against overload conditions. The under-voltage lockout
(EN/UVLO) circuit provides independently adjustable input under-voltage threshold and hysteresis.
The LM5160 is programmed through the FPWM pin to operate in continuous conduction mode (CCM) from
no load to full load or to automatically switch to discontinuous conduction mode (DCM) at light
load for higher efficiency. Forced CCM operation supports multiple output and isolated Fly-Buck
applications using a coupled inductor.
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