Product details

Vin (Max) (V) 100 Vin (Min) (V) 7.5 Iout (Max) (A) 0.6 Features Synchronous Rectification Operating temperature range (C) -40 to 125 Regulated outputs (#) 1 Package type HSOP(8)/WSON(8)
Vin (Max) (V) 100 Vin (Min) (V) 7.5 Iout (Max) (A) 0.6 Features Synchronous Rectification Operating temperature range (C) -40 to 125 Regulated outputs (#) 1 Package type HSOP(8)/WSON(8)
HSOIC (DDA) 8 19 mm² 4.9 x 3.9 WSON (NGU) 8 16 mm² 4 x 4
  • Wide 7.5-V to 100-V input range
  • Integrated 100-V high-side and low-side switches
  • No schottky required
  • Constant on-time control
  • No loop compensation required
  • Ultra-fast transient response
  • Nearly constant operating frequency
  • Intelligent peak current limit
  • Adjustable output voltage from 1.225 V
  • Precision 2% feedback reference
  • Frequency adjustable to 1 MHz
  • Adjustable undervoltage lockout (UVLO)
  • Remote shutdown
  • Thermal shutdown
  • Packages:
    • WSON-8
    • SO PowerPAD™-8
  • Create a custom regulator design using WEBENCH Power Designer
  • Wide 7.5-V to 100-V input range
  • Integrated 100-V high-side and low-side switches
  • No schottky required
  • Constant on-time control
  • No loop compensation required
  • Ultra-fast transient response
  • Nearly constant operating frequency
  • Intelligent peak current limit
  • Adjustable output voltage from 1.225 V
  • Precision 2% feedback reference
  • Frequency adjustable to 1 MHz
  • Adjustable undervoltage lockout (UVLO)
  • Remote shutdown
  • Thermal shutdown
  • Packages:
    • WSON-8
    • SO PowerPAD™-8
  • Create a custom regulator design using WEBENCH Power Designer

The LM5017 is a 100-V, 600-mA synchronous stepdown regulator with integrated high side and low side MOSFETs. The constant on-time (COT) control scheme employed in the LM5017 requires no loop compensation, provides excellent transient response, and enables very high step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.

A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout (VCC UVLO).

The LM5017 device is available in WSON-8 and HSOP PowerPAD-8 plastic packages.

The LM5017 is a 100-V, 600-mA synchronous stepdown regulator with integrated high side and low side MOSFETs. The constant on-time (COT) control scheme employed in the LM5017 requires no loop compensation, provides excellent transient response, and enables very high step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.

A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout (VCC UVLO).

The LM5017 device is available in WSON-8 and HSOP PowerPAD-8 plastic packages.

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Technical documentation

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Type Title Date
* Data sheet LM5017 100-V, 600-mA Constant On-Time Synchronous Buck / Fly-Buck™ Regulator datasheet (Rev. K) 12 Aug 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 10 Apr 2019
Application note Stability Analysis and Design of COT Type-3 Ripple Circuit 20 Mar 2019
Application note Powering Drones With a Wide VIN DC-DC Converter (Rev. A) 05 Feb 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Why a wide VIN DC/DC converter is a good fit for high-cell-count battery-powered drones 21 Nov 2017
Selection guide Control-Mode Quick Reference Guide (Rev. A) 14 Sep 2017
Technical article Simplifying 100V wide VIN power conversion 11 Nov 2016
Technical article Laying out an inverting buck-boost converter for success 28 Sep 2016
Technical article Tripping Point: Simplifying circuit breaker design using delta-sigma ADCs 10 Aug 2016
White paper Designing isolated rails on the fly with Fly-Buck™ converters 29 Sep 2015
Application note Is Your IGBT Gate-Driver Power Supply Optimized 12 Mar 2015
Analog design journal Fly-Buck(TM) converter provides EMC and isolation in PLC applications 29 Jan 2015
Application note AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) 17 Dec 2014
More literature Fly-Buck™ Solution 19 Nov 2013
White paper Wide VIN power management ICs simplify white paper (Rev. A) 19 Sep 2013
User guide AN-2204 LM5017 Isolated Supply Evaluation Board (Rev. B) 13 Aug 2013
User guide AN-2200 LM5017 Evaluation Board (Rev. B) 30 Apr 2013
Application note AN-2171 Designing Constant-On-Time Buck Regulators for Low Drop-Out Voltage (Rev. A) 23 Apr 2013
More literature High-Voltage PoL Power Solutions 30 Jan 2012
More literature LM5017 Quick Start Calculator 20 Jan 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM5017EVAL — LM5017 Wide Vin Synchronous Buck Regulator Evaluation Board

The LM5017 evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 10V output over an input range of 12.5V to 100V.

In stock
Limit: 5
Evaluation board

LM5017ISOEVAL — LM5017 Isolated Bias Supply Evaluation Board

An isolated bias supply is implemented in this evaluation board with LM5017 Constant-On-Time regulator. LM5017 regulator integrates both the high and low side power switches essential for creating isolated buck converter.

In stock
Limit: 5
Simulation model

LM5017 PSpice Transient Model (Rev. B)

SNVM020B.ZIP (31 KB) - PSpice Model
Simulation model

LM5017 TINA-TI Transient Spice Model (Rev. A)

SNVM041A.ZIP (15 KB) - TINA-TI Spice Model
Simulation model

LM5017 TINA-TI Transient Reference Design (Rev. A)

SNVM042A.TSC (203 KB) - TINA-TI Reference Design
Simulation model

LM5017 Unencrypted PSpice Transient Model (Rev. A)

SNVMAM1A.ZIP (2 KB) - PSpice Model
Calculation tool

FLYBUCK-FLYBACK-DESIGN-CALC — Fly-Buck and Flyback Topology Selector

This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
Calculation tool

LM5017-QUICKSTART-CALC — LM5017 Quick Start Calculator

LM5017 Quick Start Circuit Component Calculators for Buck Regulator and Fly-Buck™ Converter
Many TI reference designs include the LM5017

Use our reference design selection tool to review and identify designs that best match your application and parameters.

Package Pins Download
SO PowerPAD (DDA) 8 View options
WSON (NGU) 8 View options

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