A newer version of this product is available

Pin-for-pin with same functionality to the compared device.
NEW LM5169 ACTIVE 6-V to 120-V Wide VIN, 650-mA DC/DC converter with Fly-Buck™ capability FPWM and PFM mode option and low IQ.

Product details

Vin (Max) (V) 48 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) 48 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
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Technical documentation

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Type Title Date
* Data sheet LM25017 48-V, 650-mA Constant On-Time Synchronous Buck Regulator datasheet (Rev. F) 20 Nov 2017
More literature Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications PDF | HTML 09 Nov 2022
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
Technical article Simplify your power storage design with these Fly-Buck™ power tips 13 Sep 2017
Technical article Create a Fly-Buck™ converter in WEBENCH® Power Designer 09 Oct 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
Technical article Powering Bipolar Rails with Wide-VIN Fly-Buck Converter 09 Dec 2014
Technical article LM5017 Based Inverting Buck-Boost Enables Negative Supply 01 Dec 2013
More literature Fly-Buck™ Solution 19 Nov 2013
User guide AN-2204 LM5017 Isolated Supply Evaluation Board (Rev. B) 13 Aug 2013
User guide LM25017 Isolated Buck (FlyBuck) User's Guide 20 Jun 2013
User guide AN-2200 LM5017 Evaluation Board (Rev. B) 30 Apr 2013
User guide LM25017 Buck Evaluation Board 04 Apr 2013

Design & development

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

Evaluation board

LM25017MR-EVM — LM25017 Wide Vin Synchronous Step-down Regulator Evaluation Module

The LM25017MR-EVM 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 48V.
User guide: PDF
Not available on TI.com
Evaluation board

LM25017MRFBEVM — Evaluation Module - LM25017MR Wide Vin 3W Dual Output Flybuck Regulator

An isolated bias supply is implemented in this evaluation board with an LM25017 Constant-On-Time regulator.  The LM25017 regulator integrates both the high and low side power switches essential for creating an isolated buck converter.

Not available on TI.com
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
Not available on TI.com
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
Not available on TI.com
Simulation model

LM25017 PSpice Transient Model

SNVM209.ZIP (33 KB) - PSpice Model
Simulation model

LM25017 Unencrypted PSpice Transient Model

SNVMAM0.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.
Reference designs

PMP21557 — Compact low-loss isolated four-output flybuck reference design

This four output flybuck reference design the LM25017 synchronous buck converter to provide four 3.3 V, 82.5 mW outputs. Each output has 1.25 kV isolation and is regulated to 1% accuracy. A low profile transformer and low BOM count create a compact solution size.
Test report: PDF
Schematic: PDF
Reference designs

TIDA-01160 — Compact, Single-Channel, Isolated SiC and IGBT Gate Driver Reference Design for UPS and Inverters

This Silicon Carbide (SiC) FET and IGBT gate driver reference design is a blueprint to drive the power stages of UPS, AC inverter, and electric vehicle charge pile (EV charging station) applications. The design is based on TI’s UCC53xx 3-kVRMS basic isolated gate drivers to drive high- and (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP10516 — Triple Output Isolated Fly-Buck Power Supply for Industrial Application Reference Design

PMP10516 is an Isolated Flybuck Converter using the LM25017 regulator IC. The design accepts an input voltage of 20.4Vin to 28.8Vin (40Vin Max. Peak) and provides three isolated outputs. The +5Vout rail is regulated for precision using the LP2951 linear regulator.
Test report: PDF
Schematic: PDF
Reference designs

PMP4460 — 24Vin, Isolated 24V & 5Vout SIP DC/DC Module Reference Design

The PMP4460 is a 24Vin 24Vout 50mA, 5Vout 100mA reference design module which is implemented in an industry standard SIP pinout. It includes a constant on-time synchronous Flybuck controller LM25017. The solution has high efficiency, good line and load regulation with 1,500V DC isolation. The power (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP7798 — Low-Power Isolated Supply, Input range: 36V to 75V, Output: 10V @ 120mA, LM5017

Based on the Wide VIN COT Sync Buck regulator LM5017, this FlyBuck circuit provides excellent regulation for two isolated outputs and one non-isolated output. Compared with a conventional Flyback circuit, this design features a smaller board size and minimized BOM without the need for an (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP4415 — 24Vin, ±15Vout, 3W Isolated SIP DC/DC Module Reference Design

The PMP4415 is a 24Vin +15Vout 150mA, -15Vout 50mA, 3W reference design module which is implemented in an industry standard SIP pinout. It includes a constant on-time synchronous Flybuck controller LM25017. The solution has high efficiency, good line and load regulation with 1,500V DC isolation. (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP4414 — 24Vin, ±15Vout, 2W Isolated SIP DC/DC Module Reference Design

The PMP4414 is a 24Vin +15Vout 83mA, -15Vout 50mA, 2W reference design module which is implemented in an industry standard SIP pinout. It includes a constant on-time synchronous Flybuck controller LM25017. The solution has high efficiency, good line and load regulation with 1,500V DC isolation. The (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP8581 — Tiny Synchronous Buck Converter in TO-220 Size Reference Design

This design is a tiny synchronous buck converter which can be used either for 3.3V or 5.0V output voltage and a maximum current of 600mA. It has the same size like a TO-220 package and can directly replace linear regulators like the well-known uA7805.
Test report: PDF
Package Pins Download
SO PowerPAD (DDA) 8 View options
WSON (NGU) 8 View options

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