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LMR38025-Q1

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Automotive grade 80V input 2.5A synchronous step-down (buck) DC/DC converter with spread spectrum

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Data sheet

LMR38025-Q1

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 4.2 Vin (max) (V) 80 Vout (min) (V) 1 Vout (max) (V) 75 Iout (max) (A) 2.5 Iq (typ) (mA) 0.04 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 EMI features Spread Spectrum 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 Operating temperature range (°C) -40 to 150 Rating Automotive TI functional safety category Functional Safety-Capable Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
Vin (min) (V) 4.2 Vin (max) (V) 80 Vout (min) (V) 1 Vout (max) (V) 75 Iout (max) (A) 2.5 Iq (typ) (mA) 0.04 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 EMI features Spread Spectrum 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 Operating temperature range (°C) -40 to 150 Rating Automotive TI functional safety category Functional Safety-Capable Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
WSON (DRR) 12 9 mm² 3 x 3
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, T J
  • Functional Safety-Capable
  • Optimized for Low EMI requirements
    • Spread spectrum option for reduced peak emissions
    • Low package parasitics facilitating CIPR25 class 5 compliance
  • Configured for rugged automotive applications
    • Input voltage range: 4.2 V to 80 V
    • 2.5-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • Adjustable switching frequency from 200 kHz to 2.2 MHz
    • Frequency synchronization to external clock
    • 97% maximum duty cycle
    • Supports start-up events with pre-biased output
    • ±1.5% reference voltage tolerance over temperature
    • Precision enable
    • Easy to use with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 12-pin WSON Wettable Flank with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR38025-Q1 with the WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, T J
  • Functional Safety-Capable
  • Optimized for Low EMI requirements
    • Spread spectrum option for reduced peak emissions
    • Low package parasitics facilitating CIPR25 class 5 compliance
  • Configured for rugged automotive applications
    • Input voltage range: 4.2 V to 80 V
    • 2.5-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • Adjustable switching frequency from 200 kHz to 2.2 MHz
    • Frequency synchronization to external clock
    • 97% maximum duty cycle
    • Supports start-up events with pre-biased output
    • ±1.5% reference voltage tolerance over temperature
    • Precision enable
    • Easy to use with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 12-pin WSON Wettable Flank with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
  • Create a custom design using the LMR38025-Q1 with the WEBENCH Power Designer

The LMR38025-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38025-Q1 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 48-V battery automotive applications and MHEV/EV systems as the absolute maximum input voltage is 85 V.

The LMR38025-Q1 features a high voltage enable pin to enable the device by connecting it to the wide input supply voltage or by having precise UVLO control across 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 option for minimal EMI. The switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be programmed through the RT pin for improved efficiency at low operating frequencies or by having a smaller design size at high operating frequencies.

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 LMR38025-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in a 12-pin WSON package.

The LMR38025-Q1 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38025-Q1 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 48-V battery automotive applications and MHEV/EV systems as the absolute maximum input voltage is 85 V.

The LMR38025-Q1 features a high voltage enable pin to enable the device by connecting it to the wide input supply voltage or by having precise UVLO control across 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 option for minimal EMI. The switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be programmed through the RT pin for improved efficiency at low operating frequencies or by having a smaller design size at high operating frequencies.

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 LMR38025-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in a 12-pin WSON package.
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* Data sheet LMR38025-Q1SIMPLE SWITCHERPower Converter, 4.2-V to 80-V,2.5-AAutomotiveSynchronous Buck Converter With 40-µA IQ datasheet PDF | HTML 10 Nov 2023
Functional safety information LMR380x5-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 06 Nov 2023
EVM User's guide LMR38025QEVM User's Guide PDF | HTML 03 Nov 2023
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019

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Evaluation board

LMR38025QEVM — LMR38025-Q1 evaluation module for 4.2-V to 80-V, synchronous buck SIMPLE SWITCHER® power converter

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Simulation model

LMR38025F-Q1 PSpice Transient Model

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