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LM25010, LM25010-Q1
SNVS419E –DECEMBER 2005–REVISED MAY 2016
LM25010, LM25010-Q1 42-V, 1-A Step-Down Switching Regulator
1 Features
2 Applications
1
•
LM25010-Q1 Qualified for Automotive
Applications
•
•
•
Non-Isolated Telecommunications Regulators
Secondary Side Post Regulators
Automotive Electronics
•
AEC-Q100 Qualified With the Following Results:
–
Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
3 Description
The LM25010 features all the functions needed to
–
Device Temperature Grade 0: –40°C to 150°C
Ambient Operating Temperature Range
implement
a
low-cost, efficient, buck regulator
capable of supplying in excess of 1-A load current.
This high voltage regulator integrates an N-Channel
Buck Switch, and is available in thermally enhanced
10-pin WSON and 14-pin HTSSOP packages. The
constant ON-time regulation scheme requires no loop
compensation resulting in fast load transient
response and simplified circuit implementation. The
operating frequency remains constant with line and
load variations due to the inverse relationship
between the input voltage and the ON-time. The
valley current limit detection is set at 1.25 A.
Additional features include: VCC undervoltage
lockout, thermal shutdown, gate drive undervoltage
lockout, and maximum duty cycle limiter.
–
–
Device HBM ESD Classification Level 2
Device CDM ESD Classification Level C5
•
•
•
•
•
•
•
•
Wide 6-V to 42-V Input Voltage Range
Valley Current Limiting at 1.25 A
Programmable Switching Frequency Up To 1 MHz
Integrated N-Channel Buck Switch
Integrated High Voltage Bias Regulator
No Loop Compensation Required
Ultra-Fast Transient Response
Nearly Constant Operating Frequency With Line
and Load Variations
•
•
•
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Adjustable Output Voltage
2.5 V, ±2% Feedback Reference
Programmable Soft Start
Thermal Shutdown
Device Information(1)
PART NUMBER
PACKAGE
WSON (10)
HTSSOP (14)
BODY SIZE (NOM)
4.00 mm × 4.00 mm
4.40 mm × 5.00 mm
LM25010x
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Basic Step-Down Regulator
6V - 42V
Input
VCC
VIN
C3
C1
R
ON
LM25010
BST
SW
C4
L1
RON/SD
V
OUT
SHUTDOWN
D1
R1
R2
R3
SS
ISEN
FB
C2
C6
RTN
SGND
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.