Product details


Vin (Min) (V) 13 Vin (Max) (V) 100 Vout (Min) (V) 1.25 Vout (Max) (V) 300 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 2 Features Enable, Frequency Synchronization, Pre-Bias Start-Up Duty cycle (Max) (%) 80 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Boost controllers (external switch)

Package | Pins | Size

VSSOP (DGS) 10 9 mm² 3 x 3 WSON (DPR) 10 16 mm² 4 x 4 open-in-new Find other Boost controllers (external switch)


  • Internal Start-up Bias Regulator
  • Error Amplifier
  • Precision Voltage Reference
  • Programmable Softstart
  • 1A Peak Gate Driver
  • Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2)
  • Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Cycle-by-Cycle Over-Current Protection
  • Slope Compensation (LM5020-1)
  • Programmable Oscillator Frequency with Synchronization Capability
  • Current Sense Leading Edge Blanking
  • Thermal Shutdown Protection

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The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent line feed-forward. The LM5020 includes a high-voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation delays less than 100ns. Additional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and thermal shutdown. The controller is available in both MSOP-10 and LLP-10 packages.

open-in-new Find other Boost controllers (external switch)

Technical documentation

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Type Title Date
* Data sheet LM5020 100V Current Mode PWM Controller datasheet (Rev. F) Apr. 14, 2006
Technical article How to add overvoltage protection to a synchronous boost controller Sep. 17, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical article Flyback converters: two outputs are better than one Nov. 24, 2016
Technical article What is behind isolated DC/DC converter voltage regulation? Aug. 31, 2015
Technical article Isolated power supplies – Is analog dead? Sep. 24, 2013
User guide AN-1314 LM5020 Evaluation Board (Rev. B) May 06, 2013
User guide Dual Output Isolated Flyback Design:User Guide Jan. 27, 2012
Application note An Alternative Approach to Higher-Power Boost Converters Nov. 30, 2009
White paper PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design Oct. 01, 2005

Design & development

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

Hardware development

document-generic User guide

100V Current Mode PWM Controller Flyback Evaluation Board

  • Internal start-up bias regulator
  • Error amplifier
  • Precision voltage reference
  • Programmable softstart
  • 1 A peak gate driver
  • Maximum duty cycle limiting (80% for LM5020-1 or 50% for LM5020-2)
  • Programmable line under voltage lockout (UVLO) with adjustable hysteresis
  • Cycle-by-cycle over-current protection
  • Slope (...)
document-generic User guide

PSEMTHR24EVM-081 is the base board for the TPS23881 and TPS23882 PSE controllers. This board contains 24 2-Pair / 4-Pair ports that can that can be used to send up to 30W/port for IEEE 802.3at applications and up to 90W/port for IEEE 802.3bt applications.

  • 24 port PoE PSE system and expandable to 48 ports
  • Highly flexible system with configurable GUI and host interface
  • Multiport power management
  • IEEE802.3bt compliance
  • Mutiple power supplies
  • Supporting legacy powered devices

Design tools & simulation

SNVM011.ZIP (579 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 (...)
SNVC008.PDF (65 KB)

Reference designs

Many TI reference designs include the LM5020 Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

Package Pins Download
VSSOP (DGS) 10 View options
WSON (DPR) 10 View options

Ordering & quality

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