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LMR38020-Q1

ACTIVE

Automotive SIMPLE SWITCHER® power converter 4.2-V to 80-V, 2-A, synchronous buck converter

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Data sheet

LMR38020-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 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 Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 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
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • 4.2V to 80V input voltage range
    • 2A continuous output current
    • Ultra-low 40µA operating quiescent current
    • > 1.5mm distance between VIN and GND pin
    • 200kHz to 2.2MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with prebiased 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 1A, LMR38010-Q1
  • Create a custom design using the LMR38020-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Configured for rugged automotive applications
    • 4.2V to 80V input voltage range
    • 2A continuous output current
    • Ultra-low 40µA operating quiescent current
    • > 1.5mm distance between VIN and GND pin
    • 200kHz to 2.2MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with prebiased 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 1A, LMR38010-Q1
  • Create a custom design using the LMR38020-Q1 with the WEBENCH Power Designer

The LMR38020-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020-Q1 operates during input voltage dips as low as 4.2V, at nearly 100% duty cycle if needed, making the device an excellent choice for 48-V battery automotive applications and MHEV/EV systems.

The LMR38020-Q1 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 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller design 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-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in an 8-pin HSOIC PowerPAD integrated circuit package.

The LMR38020-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020-Q1 operates during input voltage dips as low as 4.2V, at nearly 100% duty cycle if needed, making the device an excellent choice for 48-V battery automotive applications and MHEV/EV systems.

The LMR38020-Q1 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 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller design 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-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in an 8-pin HSOIC PowerPAD integrated circuit package.
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Technical documentation

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Type Title Date
* Data sheet LMR38020-Q1 4.2V to 80V, 2A , Automotive, Synchronous SIMPLE SWITCHER Power Converter With 40µA IQ datasheet (Rev. B) PDF | HTML 23 Jan 2024
Application note Reducing Conducted EMI in a Buck Converter for 48 V Automotive Applications PDF | HTML 13 Dec 2023
Certificate LMR38025QEVM EU Declaration of Conformity (DoC) 08 Nov 2023
User guide LMR38020QEVM User's Guide PDF | HTML 05 Nov 2021
Functional safety information LMR380x0-Q1 Functional Safety, FIT Rate, Failure Mode Distribution, and Pin FMA PDF | HTML 05 Nov 2021
Certificate LMR38020QEVM EU RoHS Declaration of Conformity (DoC) 26 Oct 2021

Design & development

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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

LMR38020S-Q1 PSpice Transient Model

SNVMC93.ZIP (261 KB) - PSpice Model
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Reference designs

TIDA-020061 — Automotive power over data lines PD reference design for 100/1000Base-T1 Ethernet applications

This reference design implements a powered device (PD) to demonstrate Power over Data Lines (PoDL) in automotive applications. The design uses a DP83TG720S-Q1 1000MBit/s single-pair Ethernet (SPE) PHY with the option to switch to the DP83TC812S-Q1 SPE PHY for 100MBit/s operation. A coupling and (...)
Design guide: PDF
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HSOIC (DDA) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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