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LM63460-Q1

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Automotive 3-V to 36-V, 6-A, low EMI synchronous step-down converter in enhanced QFN package

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Data sheet

LM63460-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) 6 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 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 Vout (min) (V) 1 Vout (max) (V) 34.2 Iq (typ) (µA) 7 Duty cycle (max) (%) 87
Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 6 Vin (min) (V) 3 Vin (max) (V) 36 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 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 Vout (min) (V) 1 Vout (max) (V) 34.2 Iq (typ) (µA) 7 Duty cycle (max) (%) 87
VQFN-FCRLF (RYF) 22 14 mm² 4 x 3.5
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC converter
    • Wide input voltage range of 3V to 36V with tolerance for load-dump transients up to 42V
    • 4A and 6A options available
    • 1% accurate adjustable output voltage from 1V to 95% VIN
    • 150°C maximum junction temperature
    • Frequency adjustable from 200kHz to 2.2MHz using the RT pin or a SYNC signal
  • Improved reliability with optimized pinout design and clearance for short-circuit-to-adjacent-pin test
  • Designed for low EMI requirements
    • Enhanced HotRod™ QFN package with dual input paths reduces switch-node ringing
    • Spread spectrum frequency modulation
    • Selectable FPWM or PFM mode at light loads
  • High efficiency across the full load range
    • 92.5% at 13.5VIN, 5VOUT, 6A, 2.1MHz
    • 7µA typical at 3.3VOUT no-load input current
    • 0.6µA typical shutdown quiescent current
    • 0.6V typical dropout at full load
    • External bias option for improved efficiency
  • Create a custom regulator design using the LM634x0-Q1 with WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC converter
    • Wide input voltage range of 3V to 36V with tolerance for load-dump transients up to 42V
    • 4A and 6A options available
    • 1% accurate adjustable output voltage from 1V to 95% VIN
    • 150°C maximum junction temperature
    • Frequency adjustable from 200kHz to 2.2MHz using the RT pin or a SYNC signal
  • Improved reliability with optimized pinout design and clearance for short-circuit-to-adjacent-pin test
  • Designed for low EMI requirements
    • Enhanced HotRod™ QFN package with dual input paths reduces switch-node ringing
    • Spread spectrum frequency modulation
    • Selectable FPWM or PFM mode at light loads
  • High efficiency across the full load range
    • 92.5% at 13.5VIN, 5VOUT, 6A, 2.1MHz
    • 7µA typical at 3.3VOUT no-load input current
    • 0.6µA typical shutdown quiescent current
    • 0.6V typical dropout at full load
    • External bias option for improved efficiency
  • Create a custom regulator design using the LM634x0-Q1 with WEBENCH Power Designer

The LM634x0-Q1 derives from a family of automotive, synchronous, buck, DC/DC converters with excellent efficiency and ultra-low IQ. With integrated high-side and low-side MOSFETs, up to 6A of output current is delivered over a wide input voltage range from 3V to 36V, with support for load-dump transients up to 42V. The converter implements soft recovery from dropout to eliminate overshoot on the output.

The LM634x0-Q1 incorporates numerous features for excellent EMI performance, including spread-spectrum frequency modulation, a low-EMI Enhanced HotRod QFN package that mitigates switch-node ringing, and a symmetrical pinout for excellent input capacitor placement. The switching frequency can be set between 200kHz and 2.2MHz to avoid sensitive frequency bands, while optimizing efficiency or design size based on the application requirements.

PFM mode enables frequency foldback during light-load operation, allowing an unloaded current consumption of only 7µA (typical) and high light-load efficiency. A seamless transition between PWM and PFM modes, along with low MOSFET on-resistances and an external bias input, provides exceptional efficiency and thermal performance across the entire load range. The package has several NC pins between critical power pins, which improve the Failure Modes and Effects Analysis (FMEA) result.

The LM634x0-Q1 derives from a family of automotive, synchronous, buck, DC/DC converters with excellent efficiency and ultra-low IQ. With integrated high-side and low-side MOSFETs, up to 6A of output current is delivered over a wide input voltage range from 3V to 36V, with support for load-dump transients up to 42V. The converter implements soft recovery from dropout to eliminate overshoot on the output.

The LM634x0-Q1 incorporates numerous features for excellent EMI performance, including spread-spectrum frequency modulation, a low-EMI Enhanced HotRod QFN package that mitigates switch-node ringing, and a symmetrical pinout for excellent input capacitor placement. The switching frequency can be set between 200kHz and 2.2MHz to avoid sensitive frequency bands, while optimizing efficiency or design size based on the application requirements.

PFM mode enables frequency foldback during light-load operation, allowing an unloaded current consumption of only 7µA (typical) and high light-load efficiency. A seamless transition between PWM and PFM modes, along with low MOSFET on-resistances and an external bias input, provides exceptional efficiency and thermal performance across the entire load range. The package has several NC pins between critical power pins, which improve the Failure Modes and Effects Analysis (FMEA) result.
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Technical documentation

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* Data sheet LM634x0-Q1 3V to 36V, 4A and 6A, Automotive, Synchronous Buck DC/DC Converters With Adjustable Switching Frequency, Optimized for Reliability and Low EMI datasheet (Rev. C) PDF | HTML 23 Aug 2024
User guide LM63460-Q1 and LM64460-Q1 EVM User's Guide PDF | HTML 16 Dec 2021
Certificate LM63460EVM-2MHZ EU RoHS Declaration of Conformity (DoC) 09 Dec 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM63460EVM — LM63460-Q1 evaluation module automotive 5.5-V to 36-V, 6-A, low-EMI synchronous step-down converter

The LM63460EVM-2MHZ high-density evaluation module (EVM) is designed to showcase the performance of the LM63460-Q1 high-performance, automotive synchronous buck DC/DC converter. The EVM operates over a wide input voltage range of 5.5 V to 36 V to deliver a fixed 5-V output with better than 1% (...)

User guide: PDF | HTML
Not available on TI.com
Calculation tool

LM63460-LM64460DESIGN-CALC — LM63460-Q1 and LM64460-Q1 quickstart design tool

Welcome to LM63460-Q1 and LM64460-Q1 converter quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on this family of synchronous buck power converters. As such, the user can expeditiously arrive at an (...)
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Calculation tool

SNVR518 — LM63440-Q1, LM63460-Q1, LM64440-Q1 and LM64460-Q1 DC/DC Converter Quickstart Design Tool

Welcome to LM63460-Q1 and LM64460-Q1 converter quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on this family of synchronous buck power converters. As such, the user can expeditiously arrive at an (...)

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LM63460-Q1 — Automotive 3-V to 36-V, 6-A, low EMI synchronous step-down converter in enhanced QFN package LM64460-Q1 — Automotive 3-V to 36-V, 6-A, low EMI synchronous step-down converter LM63440-Q1 — Automotive, 3V to 36V, 4A low-EMI synchronous buck converter with pin-adjustable switching frequency LM64440-Q1 — Automotive, 3V to 36V, 4A low-EMI synchronous buck converter with pin-adjustable light-load mode
Hardware development
Evaluation board
LM63460EVM — LM63460-Q1 evaluation module automotive 5.5-V to 36-V, 6-A, low-EMI synchronous step-down converter
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PCB layout

LM63460-Q1, LM64460-Q1 EVM PCB Layout Files

SNVR515.ZIP (5089 KB)
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Package Pins CAD symbols, footprints & 3D models
VQFN-FCRLF (RYF) 22 Ultra Librarian
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