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LMR61430-Q1

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Automotive, 36VIN, 3A synchronous step-down converter for high efficiency and low output noise

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Data sheet

LMR61430-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 34 Vout (min) (V) 1 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000004 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
Rating Automotive Topology Buck Iout (max) (A) 3 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 34 Vout (min) (V) 1 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000004 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
WQFN-HR (RAK) 9 5 mm² (2.5 mm × 2 mm)
  • Mitigated interference and noise technology – architecture 1 (MINT 1):
    • Low output noise optimized dual random spread spectrum (DRSS)
    • Facilitates CISPR 25 class 5 compliance
    • Low inductance HotRod™ QFN package
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • Functional Safety-Capable
  • Wide operating input voltage: 3V to 36V (42V absolute maximum)
  • Programmable output voltage options available in fixed 3.3V/ADJ and 5V/ADJ
    • Adjustable output voltage range from 1V to 20V
  • Ultra-low quiescent current
    • Shutdown current: 0.75µA
    • No load standby current: 3.8µA
  • Optimized control loop for low output capacitance
  • Switching frequency from 200kHz – 2.2MHz
  • Low minimum tON (30ns typical)
  • FPWM, PFM, or external frequency synchronization available
  • Designed for scalable power supplies
  • Power-Good output for power sequencing
  • Mitigated interference and noise technology – architecture 1 (MINT 1):
    • Low output noise optimized dual random spread spectrum (DRSS)
    • Facilitates CISPR 25 class 5 compliance
    • Low inductance HotRod™ QFN package
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • Functional Safety-Capable
  • Wide operating input voltage: 3V to 36V (42V absolute maximum)
  • Programmable output voltage options available in fixed 3.3V/ADJ and 5V/ADJ
    • Adjustable output voltage range from 1V to 20V
  • Ultra-low quiescent current
    • Shutdown current: 0.75µA
    • No load standby current: 3.8µA
  • Optimized control loop for low output capacitance
  • Switching frequency from 200kHz – 2.2MHz
  • Low minimum tON (30ns typical)
  • FPWM, PFM, or external frequency synchronization available
  • Designed for scalable power supplies
  • Power-Good output for power sequencing

The LMR61430-Q1 is a 3V to 36V (42V transient), 3A, synchronous buck converter in an ultra compact 2.5mm × 2mm QFN-9 package with wettable flanks. The LMR61430-Q1 with mitigated interference and noise technology using architecture 1 features (MINT 1) enables the device to achieve low EMI performance and low output noise to facilitate noise-sensitive designs.

All device variants are capable of output voltages ranging from 1V to 20V in adjustable output configuration. Each variant is also capable of delivering a fixed output voltage by connecting the output voltage node directly to the feedback pin. The Device Comparison Table provides details on the fixed output voltage options. The current-mode control architecture with 30ns minimum on-time allows high conversion ratios at high frequencies, fast transient response, and excellent load and line regulation.

Open drain power-good output facilitates power sequencing requirements. The MODE/SYNC pin of the LMR61430-Q1 allows the user to select between forced pulse width modulation (FPWM), auto mode, or external synchronization mode of operation.

The LMR61430-Q1 is designed to offer reduced output capacitance leading to compact PCB layout and system cost savings. The LMR61430-Q1 is a part of a family of pin-compatible devices ranging in current levels from 0.6A to 6A.

The LMR61430-Q1 is a 3V to 36V (42V transient), 3A, synchronous buck converter in an ultra compact 2.5mm × 2mm QFN-9 package with wettable flanks. The LMR61430-Q1 with mitigated interference and noise technology using architecture 1 features (MINT 1) enables the device to achieve low EMI performance and low output noise to facilitate noise-sensitive designs.

All device variants are capable of output voltages ranging from 1V to 20V in adjustable output configuration. Each variant is also capable of delivering a fixed output voltage by connecting the output voltage node directly to the feedback pin. The Device Comparison Table provides details on the fixed output voltage options. The current-mode control architecture with 30ns minimum on-time allows high conversion ratios at high frequencies, fast transient response, and excellent load and line regulation.

Open drain power-good output facilitates power sequencing requirements. The MODE/SYNC pin of the LMR61430-Q1 allows the user to select between forced pulse width modulation (FPWM), auto mode, or external synchronization mode of operation.

The LMR61430-Q1 is designed to offer reduced output capacitance leading to compact PCB layout and system cost savings. The LMR61430-Q1 is a part of a family of pin-compatible devices ranging in current levels from 0.6A to 6A.
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* Data sheet LMR61430-Q1 36V, 3A , Automotive, Sync Buck Converter With Mitigated Interference and Noise Technology (MINT) and Optimized Spread Spectrum for Flat Output Noise datasheet PDF | HTML Aug 12, 2026
Functional safety information LMR614x0-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML Jun 2, 2026

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