LM5010A
LM5010A-Q1
www.ti.com
SNVS376E –OCTOBER 2005–REVISED FEBRUARY 2013
High-Voltage 1-A Step-Down Switching Regulator
Check for Samples: LM5010A, LM5010A-Q1
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FEATURES
APPLICATIONS
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Wide 6V to 75V Input Voltage Range
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Non-Isolated Telecommunications Regulator
Valley Current Limiting At 1.25A
Secondary Side Post Regulator
Automotive Electronics
Programmable Switching Frequency Up To 1
MHz
DESCRIPTION
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Integrated 80V N-Channel Buck Switch
Integrated High Voltage Bias Regulator
No Loop Compensation Required
Ultra-Fast Transient Response
The LM5010A Step-Down Switching Regulator is an
enhanced version of the LM5010 with the input
operating range extended to 6V minimum. The
LM5010A features all the functions needed to
implement
a low cost, efficient, buck regulator
Nearly Constant Operating Frequency With
Line and Load Variations
capable of supplying in excess of 1A load current.
This high voltage regulator integrates an N-Channel
Buck Switch, and is available in thermally enhanced
WSON-10 and HTSSOP-14 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 1.25A. Additional
features include: VCC under-voltage lock-out, thermal
shutdown, gate drive under-voltage lock-out, and
maximum duty cycle limiter.
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Adjustable Output Voltage
2.5V, ±2% Feedback Reference
Programmable Soft-Start
Thermal Shutdown
LM5010AQ is AEC-Q100 Grade 1 and 0
qualified
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Packages
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WSON-10 (4 mm x 4 mm)
HTSSOP-14
Both Packages Have Exposed Thermal Pad
For Improved Heat Dissipation
Basic Step-Down Regulator
6V - 75V
Input
VCC
VIN
C3
C1
R
ON
LM5010A
BST
SW
C4
L1
RON/SD
V
OUT
SHUTDOWN
D1
R1
R2
R3
SS
ISEN
FB
C2
C6
RTN
SGND
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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