Datasheet
VIN
SW
BST
LM5010A
VCC
SS
RON/SD
6V - 75V
Input
C1
R
ON
R2
R1
C2
V
OUT
L1
C3
C4
D1
C6
RTN
ISEN
SGND
FB
SHUTDOWN
R3
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
1
FEATURES
APPLICATIONS
2
• Wide 6V to 75V Input Voltage Range
• Non-Isolated Telecommunications Regulator
• Valley Current Limiting At 1.25A • Secondary Side Post Regulator
• Programmable Switching Frequency Up To 1 • Automotive Electronics
MHz
DESCRIPTION
• Integrated 80V N-Channel Buck Switch
The LM5010A Step-Down Switching Regulator is an
• Integrated High Voltage Bias Regulator
enhanced version of the LM5010 with the input
• No Loop Compensation Required
operating range extended to 6V minimum. The
• Ultra-Fast Transient Response
LM5010A features all the functions needed to
implement a low cost, efficient, buck regulator
• Nearly Constant Operating Frequency With
capable of supplying in excess of 1A load current.
Line and Load Variations
This high voltage regulator integrates an N-Channel
• Adjustable Output Voltage
Buck Switch, and is available in thermally enhanced
• 2.5V, ±2% Feedback Reference
WSON-10 and HTSSOP-14 packages. The constant
on-time regulation scheme requires no loop
• Programmable Soft-Start
compensation resulting in fast load transient
• Thermal Shutdown
response and simplified circuit implementation. The
• LM5010AQ is AEC-Q100 Grade 1 and 0
operating frequency remains constant with line and
qualified
load variations due to the inverse relationship
between the input voltage and the on-time. The valley
• Packages
current limit detection is set at 1.25A. Additional
– WSON-10 (4 mm x 4 mm)
features include: VCC under-voltage lock-out, thermal
– HTSSOP-14
shutdown, gate drive under-voltage lock-out, and
maximum duty cycle limiter.
– Both Packages Have Exposed Thermal Pad
For Improved Heat Dissipation
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.