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LMR60430-Q1

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Automotive, 36V, 3A synchronous buck converter with low Iq and high efficiency with minimized COUT

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Data sheet

LMR60430-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 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 4 Duty cycle (max) (%) 98 Type Converter
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 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (µA) 4 Duty cycle (max) (%) 98 Type Converter
WQFN-HR (RAK) 9 5 mm² 2.5 x 2
  • 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 1.8V/ADJ, 3.3V/ADJ, and 5V/ADJ
    • Adjustable output voltage range from 1V to 20V
  • Ultra-low quiescent current
    • Shutdown current: 0.7µA
    • No load standby current: 5µA
  • Optimized control loop for low output capacitance
  • ZEN 1 switcher technology:
    • Facilitates CISPR 25 class 5 compliance
    • Low inductance HotRod™ QFN package
    • Advanced spread spectrum options available
  • Switching frequency from 200kHz – 2.2MHz
  • Low minimum on time tON (30ns typical)
  • FPWM, PFM, or external frequency synchronization available
  • Designed for scalable power supplies
  • Power-Good output for power sequencing
  • 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 1.8V/ADJ, 3.3V/ADJ, and 5V/ADJ
    • Adjustable output voltage range from 1V to 20V
  • Ultra-low quiescent current
    • Shutdown current: 0.7µA
    • No load standby current: 5µA
  • Optimized control loop for low output capacitance
  • ZEN 1 switcher technology:
    • Facilitates CISPR 25 class 5 compliance
    • Low inductance HotRod™ QFN package
    • Advanced spread spectrum options available
  • Switching frequency from 200kHz – 2.2MHz
  • Low minimum on time tON (30ns typical)
  • FPWM, PFM, or external frequency synchronization available
  • Designed for scalable power supplies
  • Power-Good output for power sequencing

The LMR60430-Q1 is a 3V to 36V (42V transient), 3A, automotive-grade synchronous buck converter with Zero EMI and Noise (ZEN) 1 switcher technology. The LMR60430-Q1 is available in an ultra compact 2.5mm × 2mm HotRod™ QFN-9 package with wettable flanks available, that helps minimize inductance and achieve low EMI performance to facilitate qualification of automotive and other 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 LMR60430-Q1 allows the user to select between forced pulse width modulation (FPWM), auto mode, or external synchronization mode of operation.

The LMR60430-Q1 is designed to offer reduced output capacitance leading to compact PCB layout and system cost savings. The LMR60430-Q1 is a part of a family of pin-compatible devices ranging in current levels from 0.6A to 6A.

The LMR60430-Q1 is a 3V to 36V (42V transient), 3A, automotive-grade synchronous buck converter with Zero EMI and Noise (ZEN) 1 switcher technology. The LMR60430-Q1 is available in an ultra compact 2.5mm × 2mm HotRod™ QFN-9 package with wettable flanks available, that helps minimize inductance and achieve low EMI performance to facilitate qualification of automotive and other 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 LMR60430-Q1 allows the user to select between forced pulse width modulation (FPWM), auto mode, or external synchronization mode of operation.

The LMR60430-Q1 is designed to offer reduced output capacitance leading to compact PCB layout and system cost savings. The LMR60430-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 LMR60430-Q1 3V to 36V, 3A , Automotive, Synchronous ZEN 1 Buck Converter Optimized for Low EMI, High Power Density, and Low Output Capacitance datasheet (Rev. B) PDF | HTML 23 Jan 2026
Functional safety information LMR604x0, LMR604x0-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 12 Dec 2024

Design & development

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Evaluation board

LMR60440QEVM — LMR60440-Q1 evaluation module

The LMR60440-Q1 is a 36V, 4A, DC/DC buck converter that features synchronous rectification to achieve high conversion efficiency in a small footprint. The EVM operates over a wide input voltage range of 8V to 36V to provide a regulated 3.3V output up to 4A load at 2.2MHz switching frequency. The (...)
User guide: PDF | HTML
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Products
AC/DC & DC/DC converters (integrated FET)
LMR60440 — 36V, 4A, synchronous buck converter with low Iq and high efficiency with minimized COUT LMR60440-Q1 — Automotive, 36V, 4A synchronous buck converter with low Iq and high efficiency with minimized COUT LMR60430-Q1 — Automotive, 36V, 3A synchronous buck converter with low Iq and high efficiency with minimized COUT
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Reference designs

PMP31344 — Automotive, 12V input, 140W two-port USB Power Delivery with DisplayPort™ ALT mode reference design

This reference design represents an automotive USB Extended Power Range (EPR) system, providing both power and digital communication to two USB Type-C® ports. When connecting a USB-C cable, the TPS26744E-Q1 negotiates a target output voltage and maximum current with the plugged-in device. The (...)
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WQFN-HR (RAK) 9 Ultra Librarian
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