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LM654B0-Q1

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Automotive, 36Vin, 20A synchronous step-down converter for high efficiency and low EMC

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Data sheet

LM654B0-Q1

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Product details

Rating Automotive Topology Buck Iout (max) (A) 20 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 32 Vout (min) (V) 1 Features Adjustable soft start, Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Stackable, Thermal shutdown, UVLO adjustable EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 2.1 Duty cycle (max) (%) 99 Type Converter
Rating Automotive Topology Buck Iout (max) (A) 20 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 32 Vout (min) (V) 1 Features Adjustable soft start, Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Over Current Protection, Power good, Stackable, Thermal shutdown, UVLO adjustable EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 2.1 Duty cycle (max) (%) 99 Type Converter
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Built in clocking for stacking of converters
  • Internal or external compensation
  • Pin selectable output voltage 3.3V and 5V fixed or adjustable from 0.8V to 0.9 × VIN
  • Wide input voltage range: 3V to 36V
  • ZEN 1 switcher technology
    • Optimized for low EMI requirements
    • Facilitates CISPR 25 Class 5CISPR 11 Class B compliance
    • Enhanced HotRod™ QFN package with symmetrical pinout
  • Switching frequency from 300kHz to 2.2MHz
    • Pin-configurable AUTO or FPWM operation
    • Synchronizable with external clock
  • Low minimum on time: 40ns (maximum)
    • Enables 36V to 3.3V conversion at 2.2MHz
  • High-efficiency and high power density
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Built in clocking for stacking of converters
  • Internal or external compensation
  • Pin selectable output voltage 3.3V and 5V fixed or adjustable from 0.8V to 0.9 × VIN
  • Wide input voltage range: 3V to 36V
  • ZEN 1 switcher technology
    • Optimized for low EMI requirements
    • Facilitates CISPR 25 Class 5CISPR 11 Class B compliance
    • Enhanced HotRod™ QFN package with symmetrical pinout
  • Switching frequency from 300kHz to 2.2MHz
    • Pin-configurable AUTO or FPWM operation
    • Synchronizable with external clock
  • Low minimum on time: 40ns (maximum)
    • Enables 36V to 3.3V conversion at 2.2MHz
  • High-efficiency and high power density

The LM654B0-Q1 is a buck converter designed for high efficiency, high power density, and low EMI performance with ZEN switcher technology for automotive applications. The converter operates over a wide input voltage range of 3V to 36V with pin selectable fixed output voltages of 3.3V and 5V or an adjustable output.

The low EMI operation is enabled with minimized loop inductance, optimized SW node slew-rate, and dual-random spread spectrum (DRSS). The DRSS significantly reduces peak emissions through a combination of triangular and pseudo-random modulation while keeping output voltage ripple very low.

The current-mode control architecture with 32ns typical minimum on-time allows high conversion ratios at high frequencies, fast transient response, and excellent load and line regulation.

The LM654B0-Q1 is a buck converter designed for high efficiency, high power density, and low EMI performance with ZEN switcher technology for automotive applications. The converter operates over a wide input voltage range of 3V to 36V with pin selectable fixed output voltages of 3.3V and 5V or an adjustable output.

The low EMI operation is enabled with minimized loop inductance, optimized SW node slew-rate, and dual-random spread spectrum (DRSS). The DRSS significantly reduces peak emissions through a combination of triangular and pseudo-random modulation while keeping output voltage ripple very low.

The current-mode control architecture with 32ns typical minimum on-time allows high conversion ratios at high frequencies, fast transient response, and excellent load and line regulation.
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* Data sheet LM654B0-Q1 Pin-Compatible 20A (25A Peak) ZEN 1 Stackable Automotive Buck Converter datasheet PDF | HTML 03 Nov 2025

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LM654B0EVM-1PH — LM654B0-Q1 evaluation module

The Texas Instruments LM654B0EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LM654xx family of wide input voltage buck converters. The LM654xx family are easy to use synchronous step-down converters capable of supplying up to 10A, 12A, 15A, or 20A of load (...)
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