Product details

Vin (Min) (V) 4.2 Vin (Max) (V) 80 Vout (Min) (V) 1 Vout (Max) (V) 75 Iout (Max) (A) 2 Iq (Typ) (uA) 40 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed Rating Catalog Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 98
Vin (Min) (V) 4.2 Vin (Max) (V) 80 Vout (Min) (V) 1 Vout (Max) (V) 75 Iout (Max) (A) 2 Iq (Typ) (uA) 40 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed Rating Catalog Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 98
HSOIC (DDA) 8 HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • Input voltage range: 4.2 V to 80 V
    • 2-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • > 1.5-mm distance between VIN and GND pin
    • Adjustable switching frequency from 200 kHz to 2.2 MHz
    • Frequency synchronization to external clock
    • Spread spectrum option for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with pre-biased output
    • ±1.0% tolerance voltage reference at room temperature
    • Precision enable
    • Easy to use with low BOM count
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • 8-pin HSOIC with PowerPAD™ package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR38020 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • Input voltage range: 4.2 V to 80 V
    • 2-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • > 1.5-mm distance between VIN and GND pin
    • Adjustable switching frequency from 200 kHz to 2.2 MHz
    • Frequency synchronization to external clock
    • Spread spectrum option for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with pre-biased output
    • ±1.0% tolerance voltage reference at room temperature
    • Precision enable
    • Easy to use with low BOM count
    • Integrated synchronous rectification
    • Internal compensation for ease of use
    • 8-pin HSOIC with PowerPAD™ package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR38020 with the WEBENCH Power Designer

The LMR38020 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input industrial applications and MHEV/EV systems.

The LMR38020 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020 is available in a 8-pin HSOIC PowerPAD package.

The LMR38020 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input industrial applications and MHEV/EV systems.

The LMR38020 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020 is available in a 8-pin HSOIC PowerPAD package.

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Technical documentation

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Type Title Date
* Data sheet LMR38020 SIMPLE SWITCHER® 4.2-V to 80-V, 2-A Synchronous Buck Converter with 40-µA IQ datasheet (Rev. C) PDF | HTML 28 Jan 2022
EVM User's guide LMR38020EVM User Guide (Rev. A) PDF | HTML 19 Sep 2022
Functional safety information LMR380x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 02 Nov 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019

Design & development

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

Evaluation board

LMR38020EVM — LMR38020 evaluation module SIMPLE SWITCHER 80-V, 2-A, 2.2-MHz step-down converter with 40-uA IQ

The LMR38020EVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR38020F step-down converter. The board has jumper connector to indicate POWERGOOD flag and sync to external clock. The board also has AC signal injection terminals for loop measurements.
Not available on TI.com
Evaluation board

LMR38020QEVM — LMR38020-Q1 evaluation module SIMPLE SWITCHER® power converter 80-V, 2-A, synchronous buck, 40-µA IQ

The LM38020QEVM evaluation module (EVM) uses the LMR38020S-Q1, a 80-V DC/DC buck regulator that employs synchronous rectification to achieve high conversion efficiency in a small footprint. The EVM operates over a wide input voltage range of 6 V to 80 V to provide a regulated 5-V output at 400-kHz (...)
User guide: PDF | HTML
Not available on TI.com
Simulation model

LMR38020F PSpice Transient Model

SNVMC78.ZIP (288 KB) - PSpice Model
Simulation model

LMR38020S PSpice Transient Model

SNVMC92.ZIP (260 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 (...)
Package Pins Download
SO PowerPAD (DDA) 8 View options

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