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


Product details


Vin (Min) (V) 9.5 Vin (Max) (V) 95 Vout (Min) (V) 2.5 Vout (Max) (V) 85 Iout (Max) (A) 0.15 Iq (Typ) (uA) 485 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 600 Features Enable, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (NGU) 8 16 mm² 4 x 4 open-in-new Find other Buck converters (integrated switch)


  • Integrated N-Channel MOSFET
  • 150-mA Output Current Capability
  • Ultra-Fast Transient Response
  • No Loop Compensation Required
  • VIN Feed-Forward 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 Startup Regulator
  • Intelligent Current Limit Protection
  • External Shutdown Control
  • Thermal Shutdown
  • 8-Pin VSSOP and Thermally-Enhanced 8-Pin WSON Packages
open-in-new Find other Buck converters (integrated switch)


The LM5009 step-down switching regulator features all of the functions needed to implement a low-cost, efficient, buck bias 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 LM5009 is a well-suited alternative to a high-voltage monolithic or discrete linear solution where the power loss becomes unacceptable. 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.

open-in-new Find other Buck converters (integrated switch)
Similar products you might be interested in
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
LM5019 ACTIVE 7.5-100V Wide Vin, 100mA Constant On-Time Synchronous Buck Regulator 7.5-V to 100-V Wide Vin, 100-mA constant on-time synchronous buck regulator.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 14
Type Title Date
* Datasheet LM5009 Wide Input, 100-V,150-mA, Step-Down Switching Regulator datasheet (Rev. H) Oct. 29, 2015
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Stability Analysis and Design of COT Type-3 Ripple Circuit Mar. 20, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Simplifying 100V wide VIN power conversion Nov. 11, 2016
Technical articles Who tampered with my PLC? Are industrial control systems too flexible? Aug. 05, 2016
White paper Wide VIN power management ICs simplify white paper (Rev. A) Sep. 19, 2013
Application note AN-1820 LM5032 Interleaved Boost Converter (Rev. A) May 06, 2013
User guide AN-1962 LM5032 Interleaved Boost Evaluation Board (Rev. A) May 06, 2013
User guide AN-1445 LM5009 Evaluation Board (Rev. D) Apr. 30, 2013
User guide AN-1955 LM5009A Evaluation Board (Rev. A) Apr. 30, 2013
Application note Analysis & Design of Hysteretic Constant Freq Buck Regr Using the LM5007 (Rev. B) Apr. 30, 2013
Application note Boot Capacitor Regulation in LM25007 Constant-On-Time (COT) Converter (Rev. A) Apr. 23, 2013
Application note Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A) Apr. 23, 2013

Design & development

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

Hardware development


LM5009 150mA, 100V Step-Down Switching Regulator

  • Integrated N-Channel MOSFET
  • Guaranteed 150mA output current capability
  • Ultra-Fast Transient Response
  • No loop compensation required
  • Vin feed forward provides constant operating frequency
  • Switching frequency can exceed 600kHz
  • Highly efficient operation
  • 2% accurate 2.5V feedback from - 40°C to 125°C
  • Internal (...)

Design tools & simulation

SNVM035.TSC (141 KB) - TINA-TI Reference Design
SNVM036.ZIP (15 KB) - TINA-TI Spice Model
SNVM417.ZIP (174 KB) - PSpice Model
SNVM954.ZIP (2 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

MPPT charge controller reference design for 12-V, 24-V and 48-V solar panels
TIDA-010042 — This reference design is a Maximum Power Point Tracking (MPPT) solar charge controller for 12-V and 24-V solar panels. This compact reference design targets small and medium power solar charger solutions and is capable of operating with 15- to 60-V solar panel modules, 12- or 24-V batteries and (...)
document-generic Schematic
8 Channel, 2-A High-Side Driver Reference Design for Digital Output Modules
TIDA-01552 — 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 (...)
document-generic Schematic
Low Side 0.5A 8ch Digital Output Module for PLC
TIDA-00236 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 channels (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options
WSON (NGU) 8 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​


Related videos