Datasheet Texas Instruments LM25117PSQ/NOPB — 数据表

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Documents LM25117, LM25117-Q1
SNVS714F – APRIL 2011 – REVISED AUGUST 2015 LM25117/Q1 Wide Input Range Synchronous Buck Controller With Analog Current
Monitor
1 Features 3 Description The LM25117 is a synchronous buck controller
intended for step-down regulator applications from a
high voltage or widely varying input supply. The
control method is based upon current mode control
utilizing an emulated current ramp. Current mode
control provides inherent line feed-forward, cycle-bycycle current limiting and ease of loop compensation.
The use of an emulated control ramp reduces noise
sensitivity of the pulse-width modulation circuit,
allowing reliable control of very small duty cycles
necessary in high input voltage applications. 1 LM25117-Q1 is Qualified for Automotive
Applications
AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: -40°C to 125°C
Ambient Operating Temperature Range
Emulated Peak Current Mode Control …