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LM5009

ACTIVE

9.5-95V Wide Vin, 150mA Constant On-Time Non-Synchronous Buck Regulator

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Data sheet

A newer version of this product is available

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LM5163 ACTIVE 100-V input, 0.5-A synchronous buck DC/DC converter with ultra-low IQ Synchronous rectification for smaller footprint and high efficiency and low IQ.

LM5009

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.15 Vin (min) (V) 9.5 Vin (max) (V) 95 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 600 Features Enable, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 85 Iq (typ) (µA) 485 Duty cycle (max) (%) 99
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.15 Vin (min) (V) 9.5 Vin (max) (V) 95 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 600 Features Enable, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 85 Iq (typ) (µA) 485 Duty cycle (max) (%) 99
VSSOP (DGK) 8 14.7 mm² 3 x 4.9 WSON (NGU) 8 16 mm² 4 x 4
  • Newer product: LM5163 100-V, 0.5-A synchronous buck DC/DC converter
  • Integrated N-channel MOSFET
  • 150-mA output current capability
  • Ultra-fast transient response
  • No loop compensation required
  • VIN feedforward provides constant operating frequency
  • Switching frequency can exceed 600 kHz
  • Highly efficient operation
  • 2% accurate 2.5-V feedback from –40°C to +125°C
  • Internal start-up regulator
  • Intelligent current limit protection
  • External shutdown control
  • Thermal shutdown
  • 8-pin VSSOP and thermally enhanced 8-pin WSON packages
  • Newer product: LM5163 100-V, 0.5-A synchronous buck DC/DC converter
  • Integrated N-channel MOSFET
  • 150-mA output current capability
  • Ultra-fast transient response
  • No loop compensation required
  • VIN feedforward provides constant operating frequency
  • Switching frequency can exceed 600 kHz
  • Highly efficient operation
  • 2% accurate 2.5-V feedback from –40°C to +125°C
  • Internal start-up regulator
  • Intelligent current limit protection
  • External shutdown control
  • Thermal shutdown
  • 8-pin VSSOP and thermally enhanced 8-pin WSON packages

The LM5009 step-down switching regulator features all of the functions needed to implement a low-cost and efficient, buck regulator. This device is capable of driving a 150-mA load current from a 9.5-V to 95-V input source. The switching frequency can exceed 600 kHz, depending on the input and output voltages. The output voltage can be set from 2.5 V to 85 V. This high-voltage regulator contains an N-channel buck switch and an internal startup regulator. The device is easy to implement and is provided in 8-pin VSSOP and thermally-enhanced, 8-pin WSON packages. The regulator operation is based on a control scheme using an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant over load and input voltage variations. The control scheme requires no loop compensation, resulting in an ultrafast transient response. An intelligent current limit is implemented with forced off-time that is inversely proportional to VOUT. This scheme ensures short-circuit protection and provides minimum foldback. Other features include thermal shutdown, VCC undervoltage lockout, gate drive undervoltage lockout, and maximum duty cycle limiter.

The new product LM5163 offers reduced BOM count, reduced solution size, lower operating quiescent current and many other features. Start WEBENCH design with LM5163.

The LM5009 step-down switching regulator features all of the functions needed to implement a low-cost and efficient, buck regulator. This device is capable of driving a 150-mA load current from a 9.5-V to 95-V input source. The switching frequency can exceed 600 kHz, depending on the input and output voltages. The output voltage can be set from 2.5 V to 85 V. This high-voltage regulator contains an N-channel buck switch and an internal startup regulator. The device is easy to implement and is provided in 8-pin VSSOP and thermally-enhanced, 8-pin WSON packages. The regulator operation is based on a control scheme using an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant over load and input voltage variations. The control scheme requires no loop compensation, resulting in an ultrafast transient response. An intelligent current limit is implemented with forced off-time that is inversely proportional to VOUT. This scheme ensures short-circuit protection and provides minimum foldback. Other features include thermal shutdown, VCC undervoltage lockout, gate drive undervoltage lockout, and maximum duty cycle limiter.

The new product LM5163 offers reduced BOM count, reduced solution size, lower operating quiescent current and many other features. Start WEBENCH design with LM5163.
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Technical documentation

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Type Title Date
* Data sheet LM5009 Wide Input, 100-V,150-mA, Step-Down Switching Regulator datasheet (Rev. I) PDF | HTML 25 May 2021
Application note Stability Analysis and Design of COT Type-3 Ripple Circuit 20 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Simplifying 100V wide VIN power conversion PDF | HTML 11 Nov 2016
Technical article Who tampered with my PLC? Are industrial control systems too flexible? PDF | HTML 05 Aug 2016
White paper Wide VIN power management ICs simplify white paper (Rev. A) 19 Sep 2013
Application note AN-1820 LM5032 Interleaved Boost Converter (Rev. A) 06 May 2013
EVM User's guide AN-1962 LM5032 Interleaved Boost Evaluation Board (Rev. A) 06 May 2013
EVM User's guide AN-1445 LM5009 Evaluation Board (Rev. D) 30 Apr 2013
EVM User's guide AN-1955 LM5009A Evaluation Board (Rev. A) 30 Apr 2013
Application note Analysis & Design of Hysteretic Constant Freq Buck Regr Using the LM5007 (Rev. B) 30 Apr 2013
Application note Boot Capacitor Regulation in LM25007 Constant-On-Time (COT) Converter (Rev. A) 23 Apr 2013
Application note Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A) 23 Apr 2013

Design & development

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

Evaluation board

LM5009EVAL — 150mA, 100V Wide Vin Step-Down Switching Regulator Evaluation Module

LM5009 150mA, 100V Step-Down Switching Regulator

User guide: PDF
Not available on TI.com
Simulation model

LM5009 PSpice Transient Model

SNVM417.ZIP (174 KB) - PSpice Model
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Simulation model

LM5009 TINA-TI Transient Reference Design

SNVM035.TSC (141 KB) - TINA-TI Reference Design
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Simulation model

LM5009 TINA-TI Transient Spice Model

SNVM036.ZIP (15 KB) - TINA-TI Spice Model
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Simulation model

LM5009 Unencrypted PSpice Transient Model

SNVM954.ZIP (2 KB) - PSpice Model
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Calculation tool

LM5009QUICK-CALC — LM5009 Quick Start Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LM5009 — 9.5-95V Wide Vin, 150mA Constant On-Time Non-Synchronous Buck Regulator
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Reference designs

TIDA-01552 — 8 Channel, 2-A High-Side Driver Reference Design for Digital Output Modules

This eight-channel, parallel, 2-A, high-side, digital output reference design for factory automation applications like PLCs shows the diagnostic features and the power density of new Texas Instruments high-side driver components (such as TPS27S100). Each output can individually measure the output (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00236 — Low Side 0.5A 8ch Digital Output Module for PLC

Digital Output Modules are a standard component in a PLC/PAC or DCS to control actuators, motors and other resistive, capacitive or inductive loads. Customers will benefit from this integrated protected low side drivers and the low pin count control interface which saves pins and isolation (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
VSSOP (DGK) 8 Ultra Librarian
WSON (NGU) 8 Ultra Librarian
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