The LM5160/A is a 65-V,
2-A synchronous step-down converter with integrated
high-side and low-side MOSFETs. The adaptive 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
undervoltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage
threshold and hysteresis. The LM5160/A 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.
The LM5160A shares the same features and pin configuration as the
LM5160. An external bias supply can be connected to the VCC pin of the LM5160A in Buck and Fly-Buck
applications. This additional capability lowers IC power dissipation and improves efficiency at
high input voltages.
The LM5160/A is a 65-V,
2-A synchronous step-down converter with integrated
high-side and low-side MOSFETs. The adaptive 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
undervoltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage
threshold and hysteresis. The LM5160/A 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.
The LM5160A shares the same features and pin configuration as the
LM5160. An external bias supply can be connected to the VCC pin of the LM5160A in Buck and Fly-Buck
applications. This additional capability lowers IC power dissipation and improves efficiency at
high input voltages.