National Semiconductor LM5010A High Voltage 1A Step Down Switching Regulator Data Sheet User Manual
Summary
The LM5010A is a high-performance step-down switching regulator designed for efficient power conversion across a broad input range of 6V to 75V. This robust single component features an integrated N-Channel Buck Switch, supporting stable output up to 1A load current. The manual serves as a comprehensive technical guide for engineers, detailing the product’s full specifications, pin assignments, connection diagrams, and advanced features like programmable switching frequency and fast transient response. It is ideally suited for use in demanding industrial applications, including power supplies for automotive electronics and telecommunications infrastructure.
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January 25, 2008
LM5010A High Voltage 1A Step Down Switching Regulator General Description Features The LM5010A Step Down Switching Regulator is an en- Wide 6V to 75V Input Voltage Range hanced version of the LM5010 with the input operating range
Valley Current Limiting At 1.25A
extended to 6V minimum. The LM5010A features all the func-
Programmable Switching Frequency Up To 1 MHz
tions needed to implement a low cost, efficient, buck regulator
Integrated 80V N-Channel Buck Switch
capable of supplying in excess of 1A load current. This high
voltage regulator integrates an N-Channel Buck Switch, and Integrated High Voltage Bias Regulator
is available in thermally enhanced LLP-10 and TSSOP-14EP No Loop Compensation Required packages. The constant on-time regulation scheme requires
Ultra-Fast Transient Response
no loop compensation resulting in fast load transient re-
Nearly Constant Operating Frequency With Line and Load
sponse and simplified circuit implementation. The operating
Variations
frequency remains constant with line and load variations due
Adjustable Output Voltage
to the inverse relationship between the input voltage and the
on-time. The valley current limit detection is set at 1.25A. Ad- 2.5V, ±2% Feedback Reference
ditional features include: VCC under-voltage lock-out, thermal Programmable Soft-Start shutdown, gate drive under-voltage lock-out, and maximum
Thermal shutdown
duty cycle limiter.
Typical Applications Non-Isolated Telecommunications Regulator Secondary Side Post Regulator Power Supply for Automotive Electronics
Package LLP-10 (4 mm x 4 mm) TSSOP-14EP Both Packages Have Exposed Thermal Pad For Improved Heat Dissipation
Basic Step Down Regulator
© 2008 National Semiconductor Corporation www.national.com
Page Summary Contents For National Semiconductor LM5010A High Voltage 1A Step Down Switching Regulator Data Sheet User Manual
Manual Details
| Brand | National |
|---|---|
| Pages | 18 |
| File Size | 399.07 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What is the minimum input voltage range for the LM5010A regulator?
The nominal input range is 6V to 75V.
Does the device require loop compensation for stable operation?
No, the constant on-time regulation scheme requires no loop compensation.
What are the recommended packages for heat dissipation?
Both the LLP-10 and TSSOP-14EP packages have exposed thermal pads designed for improved heat dissipation.
At what level does the device shut off due to overcurrent?
The valley current limit detection is set at 1.25A (typical).