Integrated Switching Controllers LM25117PMHE/NOPB LM25117PMH/NOPB

LM25117PMHE/NOPB LM25117PMH/NOPB LM25117PMHX/NOPB LM25117PMH Switching Controllers

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1Features

LM25117-Q1 is Qualified for Automotive
Applications
AEC-Q100 Qualified With the Following Results:
-Device Temperature Grade1:-40°Cto125°℃
Ambient Operating Temperature Range
Emulated Peak Current Mode Control
Wide Operating Range from 4.5 Vto42 V
Robust 3.3 A Peak Gate Drives
Adaptive Dead-time Output Driver Control
Free-run or Synchronizable Clockup to750 kHz
Optional Diode Emulation Mode
Programmable Output from 0.8 V
Precision 1.5% Voltage Reference
Analog Current Monitor
Programmable Current Limit
Hiccup Mode Over Current Protection
Programmable Soft-start and Tracking
Programmable Line Undervoltage Lockout
Programmable Switch-over to Extenal Bias
Supply
. Thermal Shutdown

2 Applications

Automotive Infotainment
Industrial DC-DC Motor Drivers
Automotive USB Power
Telecom Server

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-forwardcycle-by-
cycle current limiting and ease of loop compensation.
The use of an emulated control ramp reducesnoise
sensitivity of the pulse-width modulation circuit,
allowing reliable control of very small dutycycles
necessary in high input voltage applications.
The operating frequency is programmable from 50
kHz to 750 kHz. The LM25117 drives external high-
side and low-side NMos power switches with
adaptive dead-time control. A user-selectable diode
emulation modeenablesdiscontinuousmode
operation for improved efficiency at light load
conditions. A high voltage bias requlator that allows
external bias supply further improves efficiency.The
LM25117's unique analog telemetry feature provides
average
outputcurrentinformation.
Additional
features include thermal shutdown,
frequency
synchronization,hiccup mode current
t limit and
adjustable line undervoltage lockout.

Integrated Switching Controllers

LM25117 Switching Controllers

LM25117PMH

Integrated Switching Controllers LM25117PMHE/NOPB LM25117PMH/NOPB Images