Datasheet Texas Instruments LM25085AMYX/NOPB — Datenblatt

LM25085A
www.ti.com SNVS601B – JANUARY 2009 – REVISED MARCH 2013 LM25085A 42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference
Check for Samples: LM25085A FEATURES DESCRIPTION The LM25085A is a functional variant of the LM25085
COT PFET Buck Switching Controller. The functional
differences of the LM25085A are: The feedback
reference voltage is 0.9V, the forced off-time after
current limit detection is longer, and the soft-start time
is shorter (1.8 ms). 1 2 Wide 4.5V to 42V Input Voltage Range
Adjustable Current Limit using RDS(ON) or a
Current Sense Resistor
Programmable Switching Frequency to 1MHz
No Loop Compensation Required
Ultra-Fast Transient Response
Nearly Constant Operating Frequency with
Line and Load Variations
Adjustable Output Voltage from 0.9V
Precision В±2% Feedback Reference
Capable of 100% Duty Cycle Operation
Internal Soft-Start Timer
Integrated High Voltage Bias Regulator
Thermal Shutdown The LM25085A is a high efficiency PFET switching
regulator controller that can be used to quickly and
easily develop a small, efficient buck regulator for a …