LM5010A_14 Datasheet, PDF (1/28 Pages) Texas Instruments – High-Voltage 1-A Step-Down Switching Regulator

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LM5010A
LM5010A-Q1
SNVS376D – OCTOBER 2005 – REVISED DECEMBER 2008
High-Voltage 1-A Step-Down Switching Regulator
Check for Samples: LM5010A, LM5010A-Q1
FEATURES
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•2 Wide 6V to 75V Input Voltage Range
• Valley Current Limiting At 1.25A
• Programmable Switching Frequency Up To 1
MHz
• Integrated 80V 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
• Adjustable Output Voltage
• 2.5V, ±2% Feedback Reference
• Programmable Soft-Start
• Thermal shutdown
• LM5010AQ is AEC-Q100 Grade 1 and 0
qualified
• Packages
– LLP-10 (4 mm x 4 mm)
– TSSOP-14EP
– Both Packages Have Exposed Thermal Pad
For Improved Heat Dissipation
APPLICATIONS
• Non-Isolated Telecommunications Regulator
• Secondary Side Post Regulator
• Automotive Electronics
DESCRIPTION
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 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 LLP-10 and TSSOP-14EP 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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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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.
Copyright © 2005–2008, Texas Instruments Incorporated