Datasheet
VIN
SW
BST
LM25010
VCC
SS
RON/SD
6V - 42V
Input
C1
R
ON
R2
R1
C2
V
OUT
L1
C3
C4
D1
C6
RTN
ISEN
SGND
FB
SHUTDOWN
R3
LM25010
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SNVS419D –DECEMBER 2005–REVISED FEBRUARY 2013
LM25010/LM25010Q 42V, 1.0A Step-Down Switching Regulator
Check for Samples: LM25010
1
FEATURES
PACKAGE
2
• Wide 6V to 42V Input Voltage Range
• WSON-10 (4 mm x 4 mm)
• Valley Current Limiting At 1.25A • HTSSOP-14EP
• Programmable Switching Frequency Up To 1 • Both packages have exposed thermal pad for
MHz improved heat dissipation
• Integrated N-Channel Buck Switch
DESCRIPTION
• Integrated High Voltage Bias Regulator
The LM25010 features all the functions needed to
• No Loop Compensation Required
implement a low cost, efficient, buck regulator
• Ultra-Fast Transient Response
capable of supplying in excess of 1A load current.
This high voltage regulator integrates an N-Channel
• Nearly Constant Operating Frequency With
Buck Switch, and is available in thermally enhanced
Line and Load Variations
WSON-10 and HTSSOP-14EP packages. The
• Adjustable Output Voltage
constant on-time regulation scheme requires no loop
• 2.5V, ±2% Feedback Reference
compensation resulting in fast load transient
response and simplified circuit implementation. The
• Programmable Soft-Start
operating frequency remains constant with line and
• Thermal shutdown
load variations due to the inverse relationship
• LM25010Q is AEC-Q100 Grade 1 & 0 qualified
between the input voltage and the on-time. The valley
current limit detection is set at 1.25A. Additional
TYPICAL APPLICATIONS
features include: VCC under-voltage lock-out, thermal
shutdown, gate drive under-voltage lock-out, and
• Non-Isolated Telecommunications Regulator
maximum duty cycle limiter.
• Secondary Side Post Regulator
• Automotive Electronics
BASIC STEP-DOWN REGULATOR
1
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PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.