LM5009

ACTIVE

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

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Product details

Parameters

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) (mA) 0.485 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)

Features

  • 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
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Description

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.

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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

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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

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Hardware development

EVALUATION BOARD Download
49
Description

LM5009 150mA, 100V Step-Down Switching Regulator

Features
  • 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

SIMULATION MODEL Download
SNVM035.TSC (141 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVM036.ZIP (15 KB) - TINA-TI Spice Model
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SNVM417.ZIP (174 KB) - PSpice Model
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SNVM954.ZIP (2 KB) - PSpice Model
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Features
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  • Supports simultaneous analysis of multiple products
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CAD/CAE symbols

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

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