Datasheet Texas Instruments LM5085QMY/NOPB — Ficha de datos

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SNVS565I – NOVEMBER 2008 – REVISED AUGUST 2015 LM5085/-Q1 75-V Constant On-Time PFET Buck Switching Controller
1 Features 3 Description The LM5085 is a high efficiency PFET switching
regulator controller that can be used to quickly and
easily develop a small, efficient buck regulator for a
wide range of applications. This high voltage
controller contains a PFET gate driver and a high
voltage bias regulator which operates over a wide
4.5-V to 75-V input range. The constant on-time
regulation principle requires no loop compensation,
simplifies circuit implementation, and results in
ultrafast load transient response. The operating
frequency remains nearly constant with line and load
variations due to the inverse relationship between the
input voltage and the on-time. The PFET architecture
allows 100% duty cycle operation for a low dropout
voltage. Either the RDS(ON) of the PFET or an external
sense resistor can be used to sense current for overcurrent detection. 1 LM5085-Q1 is an Automotive Grade Product that …