3.1-75V Wide Vin, 0.5A Current Mode Boost, Flyback, Sepic Converter


Product details


Vin (Min) (V) 3.1 Vin (Max) (V) 75 Vout (Min) (V) 1.26 Vout (Max) (V) 75 Switch current limit (Typ) (A) 0.5 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1500 Iq (Typ) (mA) 3.1 Features Enable, Frequency Synchronization Duty cycle (Max) (%) 85 Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 WSON (NGT) 8 16 mm² 4 x 4 open-in-new Find other Boost converters (integrated switch)


  • Integrated 75-V N-channel MOSFET
  • Ultra-wide input voltage range from 3.1 V to 75 V
  • Integrated high voltage bias regulator
  • Adjustable output voltage
  • 1.5% output voltage accuracy
  • Current mode control with selectable compensation
  • Wide bandwidth error amplifier
  • Integrated current sensing and limiting
  • Integrated slope compensation
  • 85% maximum duty cycle limit
  • Single resistor oscillator programming
  • Oscillator synchronization capability
  • Enable and undervoltage lockout (UVLO) pin
  • 8-pin SOIC package
  • 8-pin WSON package
  • Thermal shutdown with hysteresis
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The LM5002 high voltage switch mode regulator features all of the functions necessary to implement efficient high voltage boost, flyback, SEPIC and forward converters, using few external components. This easy to use regulator integrates a 75-V N-Channel MOSFET with a 0.5-A peak current limit. Current mode control provides inherently simple loop compensation and line-voltage feed-forward for superior rejection of input transients. The switching frequency is set with a single resistor and is programmable up to 1.5 MHz. The oscillator can also be synchronized to an external clock. Additional protection features include: current limit, thermal shutdown, undervoltage lockout and remote shutdown capability. The device is available in both 8-pin SOIC and 8-pin WSON packages. To create a custom regulator design, use the LM5002 with WEBENCH® Power Designer.

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Technical documentation

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Type Title Date
* Data sheet LM5002 Wide Input Voltage Switch Mode Regulator datasheet (Rev. F) May 06, 2021
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
White paper Wide VIN power management ICs simplify white paper (Rev. A) Sep. 19, 2013
User guide AN-1736 LM3433 HB LED Driver Evaluation Kit (Rev. C) May 03, 2013
User guide AN-1793 LM3433 4A to 20A LED Driver Evaluation Board (Rev. B) May 03, 2013
User guide AN-1937 LM3433 10A to 40A LED Driver Evaluation Board (Rev. D) May 03, 2013
User guide AN-2041 LM3434 20A Evaluation Board (Rev. B) May 03, 2013
User guide Small Split Rail Isolated + - 5V Power Supply Generator User Guide Jan. 27, 2012

Design & development

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

Design tools & simulation

SNVM392.ZIP (247 KB) - PSpice Model
SNVM530.TSC (450 KB) - TINA-TI Reference Design
SNVM531.TSC (421 KB) - TINA-TI Reference Design
SNVM532.ZIP (18 KB) - TINA-TI Spice Model
SNVM952.ZIP (3 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
  • (...)
Fly-Buck and Flyback Topology Selector
FLYBUCK-FLYBACK-DESIGN-CALC 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.
  • Features isolated topologies like Fly-Buck™, Fly-Buck-Boost, DCM and CCM Flyback
  • Capability to design up to 6 isolated outputs
  • Recommends ICs for desired application design
  • Incorporates loop compensation in designs
  • Compares efficiency, external component count and transformer currents for every topology (...)
SNVC020.ZIP (307 KB)

Reference designs

Input Protection and Backup Supply Reference Design for 25W PLC Controller Unit
TIDA-03031 The TIDA-03031 reference design provides a solution for input power path protection and backup supply design in a typical PLC controller unit. It replaces traditionally used discrete-circuit implementations with fully integrated protection circuits.
document-generic Schematic
Portable, High Brightness HD Projection Display Reference Design using DLP® Technology
TIDA-00782 This reference design, featuring the DLP Pico™ 0.45-inch WXGA display chipset enables use of HD resolution for projection display applications such as accessory projectors, smart projectors, mobile Smart TV, built in projectors like projection functionality inside notebooks, laptops and hot (...)
document-generic Schematic
180W RGB LED Drivers for DLP Projector application
PMP4356 The PMP4356 is RGB LED drivers solution which used in high power density DLP projector. LM3434 and power block CSD87350 are used in each rail to provide up to 15A of drive ability. The design demostrates high efficiency up to  92.5%@full load within the form factor of 80mm*45mm*10.8mm with good (...)
Small Split Rail Isolated + - 5V Power Supply Generator
SMSPLITRAILISO-REF A very low noise differential power supply for split rail systems requiring +5V and -5V (higher or lower voltage is possible). This design is fully isolated and capable of floating to over 500V differential from Vin to Vout (higher is possible). The LM5001 IC is a fully integrated flyback regulator (...)

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
WSON (NGT) 8 View options

Ordering & quality

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