Product details

Vin (Min) (V) 6 Vin (Max) (V) 95 Vout (Min) (V) 2.5 Vout (Max) (V) 75 Iout (Max) (A) 0.35 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
Vin (Min) (V) 6 Vin (Max) (V) 95 Vout (Min) (V) 2.5 Vout (Max) (V) 75 Iout (Max) (A) 0.35 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
VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (NGU) 8 16 mm² 4 x 4
  • Operating Input Voltage Range: 6 V to 95 V
  • Integrated 100-V N-Channel Buck Switch
  • Internal Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • On-Time Varies Inversely With Input Voltage
  • Operating Frequency Remains Constant With Varying Line Voltage and Load Current
  • Adjustable Output Voltage From 2.5 V
  • Highly Efficient Operation
  • Precision Internal Reference
  • Low Bias Current
  • Intelligent Current Limit
  • Thermal Shutdown
  • 8-Pin VSSOP and 8-Pin WSON Packages
  • Create a Custom Design Using the LM5008A With the WEBENCH® Power Designer
  • Operating Input Voltage Range: 6 V to 95 V
  • Integrated 100-V N-Channel Buck Switch
  • Internal Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • On-Time Varies Inversely With Input Voltage
  • Operating Frequency Remains Constant With Varying Line Voltage and Load Current
  • Adjustable Output Voltage From 2.5 V
  • Highly Efficient Operation
  • Precision Internal Reference
  • Low Bias Current
  • Intelligent Current Limit
  • Thermal Shutdown
  • 8-Pin VSSOP and 8-Pin WSON Packages
  • Create a Custom Design Using the LM5008A With the WEBENCH® Power Designer

The LM5008A DC/DC converter is a functional variant of the LM5008 COT Buck Switching Regulator. The functional differences of the LM5008A are: the minimum input operating voltage is 6 V, the on-time equation is slightly different, and the requirement for a minimum load current is removed.

The LM5008A 350-mA step-down switching regulator features all of the functions required to implement a low-cost and efficient buck regulator. This high-voltage converter has an integrated 100-V N-channel buck switch and operates over an input voltage range of 6 V to 95 V. The device is easy to implement and is provided in 8-pin VSSOP and the thermally enhanced 8-pin WSON packages. The converter uses PWM control scheme with an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced off-time, which is inversely proportional to VOUT. This scheme ensures short-circuit control while providing minimum foldback. Other features include: thermal shutdown, VCC undervoltage lockout, gate drive undervoltage lockout, maximum duty cycle limiter, and a pre-charge switch.

The LM5008A DC/DC converter is a functional variant of the LM5008 COT Buck Switching Regulator. The functional differences of the LM5008A are: the minimum input operating voltage is 6 V, the on-time equation is slightly different, and the requirement for a minimum load current is removed.

The LM5008A 350-mA step-down switching regulator features all of the functions required to implement a low-cost and efficient buck regulator. This high-voltage converter has an integrated 100-V N-channel buck switch and operates over an input voltage range of 6 V to 95 V. The device is easy to implement and is provided in 8-pin VSSOP and the thermally enhanced 8-pin WSON packages. The converter uses PWM control scheme with an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced off-time, which is inversely proportional to VOUT. This scheme ensures short-circuit control while providing minimum foldback. Other features include: thermal shutdown, VCC undervoltage lockout, gate drive undervoltage lockout, maximum duty cycle limiter, and a pre-charge switch.

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Technical documentation

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Type Title Date
* Data sheet LM5008A 95-V, 350-mA, Constant On-Time DC/DC Buck Switching Regulator datasheet (Rev. H) 11 Oct 2018
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Technical article Eight switching circuits to power wide VIN applications - brought to you by Vijay Choudhary and presented by Santa’s reindeer 18 Dec 2013
White paper Wide VIN power management ICs simplify white paper (Rev. A) 19 Sep 2013
User guide AN-1925 LM5008A Evaluation Board (Rev. C) 30 Apr 2013

Design & development

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Evaluation board

LM5008AEVAL — Evaluation Board for the LM5008A Wide Vin Constant On-time Buck Switching Regulator

The LM5008AEVAL 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 5V output over an input range of 8V to 75V. The circuit delivers load currents to 300 mA, with current (...)

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Simulation model

LM5008 TINA-TI Transient Spice Model

SNVM527.ZIP (12 KB) - TINA-TI Spice Model
Simulation model

LM5008 TINA-TI Transient Reference Design

SNVM528.TSC (583 KB) - TINA-TI Reference Design
Simulation model

LM5008 TINA-TI Reference Design

SNVM529.TSC (584 KB) - TINA-TI Reference Design
Simulation model

LM5008 Unencrypted PSpice Transient Model

SNVM953.ZIP (2 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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LM5008AQUICK-CALC — LM5008A Quick Start Calculator

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VSSOP (DGK) 8 View options
WSON (NGU) 8 View options

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