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LM5017

ACTIVE

7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator

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Data sheet

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LM5169 ACTIVE 6V to 120V Wide VIN, 650-mA DC/DC converter with Fly-Buck™ capability FPWM and PFM mode option and low IQ.

LM5017

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck, Flybuck Iout (max) (A) 0.6 Vin (max) (V) 100 Vin (min) (V) 7.5 Vout (max) (V) 90 Vout (min) (V) 1.25 Switch current limit (typ) (A) 1.3 Features Enable, Synchronous rectification, UVLO adjustable Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00005 Duty cycle (max) (%) 90
Rating Catalog Topology Buck, Flybuck Iout (max) (A) 0.6 Vin (max) (V) 100 Vin (min) (V) 7.5 Vout (max) (V) 90 Vout (min) (V) 1.25 Switch current limit (typ) (A) 1.3 Features Enable, Synchronous rectification, UVLO adjustable Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00005 Duty cycle (max) (%) 90
WSON (NGU) 8 16 mm² (4 mm × 4 mm) HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm)
  • 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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Top documentation Type Title Format options Date
* Data sheet LM5017 100-V, 600-mA Constant On-Time Synchronous Buck / Fly-Buck™ Regulator datasheet (Rev. K) PDF | HTML Aug 12, 2021
Product overview Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) PDF | HTML Aug 20, 2024
Analog design Journal Control-Mode Quick Reference Guide (Rev. B) PDF | HTML Aug 29, 2023
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr 8, 2021
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) Apr 10, 2019
Application note Stability Analysis and Design of COT Type-3 Ripple Circuit Mar 20, 2019
Application brief Powering Drones With a Wide VIN DC-DC Converter (Rev. A) Feb 5, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun 25, 2018
Technical article Why a wide VIN DC/DC converter is a good fit for high-cell-count battery-powered d PDF | HTML Nov 21, 2017
Technical article Simplifying 100V wide VIN power conversion PDF | HTML Nov 11, 2016
Technical article Laying out an inverting buck-boost converter for success PDF | HTML Sep 28, 2016
Technical article Power Tips: Self-drive your synchronous rectifier PDF | HTML Mar 9, 2016
Technical article Create a Fly-Buck™ converter in WEBENCH® Power Designer PDF | HTML Oct 9, 2015
White paper Designing isolated rails on the fly with Fly-Buck™ converters Sep 29, 2015
Technical article What is behind isolated DC/DC converter voltage regulation? PDF | HTML Aug 31, 2015
Application note Is Your IGBT Gate-Driver Power Supply Optimized Mar 12, 2015
Analog design Journal Fly-Buck(TM) converter provides EMC and isolation in PLC applications Jan 29, 2015
Application note AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) Dec 17, 2014
Product overview Fly-Buck™ Solution Nov 19, 2013
White paper Wide VIN power management ICs simplify white paper (Rev. A) Sep 19, 2013
Application note AN-2171 Designing Constant-On-Time Buck Regulators for Low Drop-Out Voltage (Rev. A) Apr 23, 2013
More literature High-Voltage PoL Power Solutions Jan 30, 2012
More literature LM5017 Quick Start Calculator Jan 20, 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.

User guide: PDF
Supported products & hardware
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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.

User guide: PDF
Supported products & hardware
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Simulation model

LM5017 PSpice Transient Model (Rev. B)

SNVM020B.ZIP (31 KB) - PSpice model
Supported products & hardware
Simulation model

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

SNVM042A.TSC (203 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

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

SNVM041A.ZIP (15 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

LM5017 Unencrypted PSpice Transient Model (Rev. A)

SNVMAM1A.ZIP (2 KB) - PSpice model
Supported products & hardware
Calculation tool

FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator

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.

Supported products & hardware
Calculation tool

LM5017-QUICKSTART-CALC — LM5017 Buck Quick Start Calculator

LM5017 Quick Start Circuit Component Calculators for Buck Regulator and Fly-Buck™ Converter

Supported products & hardware

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 CAD symbols, footprints & 3D models
WSON (NGU) 8 Ultra Librarian
HSOIC (DDA) 8 Ultra Librarian
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