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Buck converters (integrated switch)

LM5010

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8-75V Wide Vin, 1A Constant On-Time Non-Synchronous Buck Regulator

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Data sheet

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LM5010

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 8 Vin (max) (V) 75 Vout (min) (V) 2.5 Vout (max) (V) 70 Iout (max) (A) 1 Iq (typ) (mA) 0.65 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode Constant on-time (COT) Duty cycle (max) (%) 99 Type Converter
Vin (min) (V) 8 Vin (max) (V) 75 Vout (min) (V) 2.5 Vout (max) (V) 70 Iout (max) (A) 1 Iq (typ) (mA) 0.65 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode Constant on-time (COT) Duty cycle (max) (%) 99 Type Converter
HTSSOP (PWP) 14 32 mm² 5 x 6.4 WSON (DPR) 10 16 mm² 4 x 4
  • Input Voltage Range: 8 V to 75 V
  • Valley Current Limit At 1.25 A
  • Switching Frequency Can Exceed 1 MHz
  • Integrated N-Channel Buck Switch
  • Integrated Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant With
    Load and Line Variations
  • Maximum Duty Cycle Limited During Start-Up
  • Adjustable Output Voltage
  • Precision 2.5-V Feedback Reference
  • Thermal Shutdown
  • Exposed Thermal Pad for Improved Heat
    Dissipation
  • Input Voltage Range: 8 V to 75 V
  • Valley Current Limit At 1.25 A
  • Switching Frequency Can Exceed 1 MHz
  • Integrated N-Channel Buck Switch
  • Integrated Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant With
    Load and Line Variations
  • Maximum Duty Cycle Limited During Start-Up
  • Adjustable Output Voltage
  • Precision 2.5-V Feedback Reference
  • Thermal Shutdown
  • Exposed Thermal Pad for Improved Heat
    Dissipation

The LM5010 step-down switching regulator features all the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying in excess of 1-A load current. This high-voltage regulator contains an N-Channel Buck Switch, and is available in thermally enhanced 10-pin WSON and 14-pin HTSSOP packages. The hysteretic regulation scheme requires no loop compensation, resulting in fast load transient response, and simplifies 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.

The LM5010 step-down switching regulator features all the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying in excess of 1-A load current. This high-voltage regulator contains an N-Channel Buck Switch, and is available in thermally enhanced 10-pin WSON and 14-pin HTSSOP packages. The hysteretic regulation scheme requires no loop compensation, resulting in fast load transient response, and simplifies 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.
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Technical documentation

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Type Title Date
* Data sheet LM5010 High-Voltage 1-A Step-Down Switching Regulator datasheet (Rev. G) PDF | HTML 27 Apr 2016
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
EVM User's guide AN-1352 LM5010 Evaluation Board (Rev. A) 30 Apr 2013
EVM User's guide AN-1423 LM5010A Evaluation Board (Rev. A) 30 Apr 2013
Application note Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A) 23 Apr 2013

Design & development

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Evaluation board

LM5010-EVAL — Wide Vin 1A Step Down Switching Regulator Evaluation Module

LM5010 High Voltage 1A Step Down Switching Regulator

User guide: PDF
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User guide: PDF
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Simulation model

LM5010A PSpice Transient Model

SNVM493.ZIP (39 KB) - PSpice Model
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Simulation model

LM5010A Unencrypted PSpice Transient Model

SNVM976.ZIP (4 KB) - PSpice Model
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Calculation tool

LM5010QUICK-CALC — LM5010 Quick Start Calculator

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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Reference designs

PMP10812 — Class 2 Non-isolated PoE Buck Converter (5V/1A) Reference Design

The PMP10812 reference design is ideal for Class 2 PoE PD applications that do not require isolation.  The TPS2378 PD controller provides the interface to the PSE.  The LM5010 buck converter has an integrated high side FET and external low side diode rectifier for low cost.
Test report: PDF
Schematic: PDF
Package Pins Download
HTSSOP (PWP) 14 View options
WSON (DPR) 10 View options
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