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LMR38010

ACTIVE

SIMPLE SWITCHER® 80-V, 1.0-A, 2.2-MHz step-down converter with 40-µA IQ

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Data sheet

LMR38010

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4.2 Vin (max) (V) 80 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 EMI features Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 75 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 1 Vin (min) (V) 4.2 Vin (max) (V) 80 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 EMI features Spread Spectrum Control mode current mode Vout (min) (V) 1 Vout (max) (V) 75 Iq (typ) (µA) 40 Duty cycle (max) (%) 98
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.2-V to 80-V input voltage range
    • 1-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • > 1.5-mm distance between VIN and GND pin
    • 200-kHz to 2.2-MHz adjustable switching frequency
    • 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 device with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 8-pin HSOIC with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
    • Available in 2-A, LMR38020
  • Create a custom design using the LMR38010 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.2-V to 80-V input voltage range
    • 1-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • > 1.5-mm distance between VIN and GND pin
    • 200-kHz to 2.2-MHz adjustable switching frequency
    • 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 device with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 8-pin HSOIC with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
    • Available in 2-A, LMR38020
  • Create a custom design using the LMR38010 with the WEBENCH Power Designer

The LMR38010 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38010 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input industrial applications and MHEV/EV systems.

The LMR38010 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 LMR38010 is available in an 8-pin HSOIC PowerPAD integrated circuit package.

The LMR38010 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38010 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input industrial applications and MHEV/EV systems.

The LMR38010 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 LMR38010 is available in an 8-pin HSOIC PowerPAD integrated circuit package.
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Technical documentation

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* Data sheet LMR38010 4.2-V to 80-V, 1-A, Synchronous SIMPLE SWITCHER Power Converter with 40-µA IQ datasheet (Rev. B) PDF | HTML 18 Sep 2023
Application note Static Magnet Power Supply Design for Magnetic Resonance Imaging Application PDF | HTML 22 Jan 2024
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

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.
User guide: PDF | HTML
Not available on TI.com
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Design guide: PDF
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TIDA-010090 — 4-channel, 50A, digital control battery cell tester reference design

The reference design illustrates a method to control the current and voltage of a bidirectional buck converter power stage using a C2000™ real-time microcontroller (MCU) and a precision analog-to-digital converter (ADC) ADS8588S. The design achieves less than ±10mA current regulation error and (...)
Design guide: PDF
Reference designs

TIDA-010936 — 48V/16A small form factor three-phase GaN inverter reference design for integrated motor drives

This reference design demonstrates a high-power density 12V to 60V 3-phase power stage using three LMG2100R044 100V, 35A GaN half-bridges with integrated GaN FETs, driver and bootstrap diode specifically for motor-integrated servo drives and robotics applications.  
Accurate phase-current sensing (...)
Design guide: PDF
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HSOIC (DDA) 8 Ultra Librarian
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