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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

Iout (max) (A) 6 Vin (min) (V) 3 Vin (max) (V) 36 Topology Buck Type Converter 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 Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34.2 Rating Automotive Operating temperature range (°C) -40 to 150
Iout (max) (A) 6 Vin (min) (V) 3 Vin (max) (V) 36 Topology Buck Type Converter 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 Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34.2 Rating Automotive Operating temperature range (°C) -40 to 150
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 3 V to 36 V with tolerance for load-dump transients up to 42 V
    • 1% accurate adjustable output voltage from 1 V to 95% V IN
    • 150°C maximum junction temperature
    • Frequency adjustable from 200 kHz to 2.2 MHz using the RT pin or a SYNC signal
  • Improved reliability with optimized pinout design and clearance for short-circuit-to-adjacent-pin test
  • Optimized 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 13.5 V IN, 5 V OUT, 6 A, 2.1 MHz
    • No-load input current: 7-µA typical at 3.3 V OUT
    • Shutdown quiescent current: 0.6-µA typical
    • 0.6-V typical dropout at 6-A load
    • External bias option for improved efficiency
  • Create a custom regulator design using the LM63460-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 3 V to 36 V with tolerance for load-dump transients up to 42 V
    • 1% accurate adjustable output voltage from 1 V to 95% V IN
    • 150°C maximum junction temperature
    • Frequency adjustable from 200 kHz to 2.2 MHz using the RT pin or a SYNC signal
  • Improved reliability with optimized pinout design and clearance for short-circuit-to-adjacent-pin test
  • Optimized 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 13.5 V IN, 5 V OUT, 6 A, 2.1 MHz
    • No-load input current: 7-µA typical at 3.3 V OUT
    • Shutdown quiescent current: 0.6-µA typical
    • 0.6-V typical dropout at 6-A load
    • External bias option for improved efficiency
  • Create a custom regulator design using the LM63460-Q1 with WEBENCH Power Designer

The LM63460-Q1 derives from a family of automotive synchronous buck DC/DC converters with excellent efficiency and ultra-low I Q. With integrated high-side and low-side MOSFETs, up to 6 A of output current is delivered over a wide input voltage range from 3 V to 36 V, with support for load-dump transients up to 42 V. The converter implements soft recovery from dropout to eliminate overshoot on the output.

The LM63460-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 ideal input capacitor placement. The switching frequency can be set between 200 kHz and 2.2 MHz 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 7 µA (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 LM63460-Q1 derives from a family of automotive synchronous buck DC/DC converters with excellent efficiency and ultra-low I Q. With integrated high-side and low-side MOSFETs, up to 6 A of output current is delivered over a wide input voltage range from 3 V to 36 V, with support for load-dump transients up to 42 V. The converter implements soft recovery from dropout to eliminate overshoot on the output.

The LM63460-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 ideal input capacitor placement. The switching frequency can be set between 200 kHz and 2.2 MHz 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 7 µA (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 LM63460-Q13-V to 36-V, 6-AAutomotiveSynchronous Buck DC/DC ConverterWith Adjustable Switching Frequency,Optimized for Reliability and Low EMI datasheet (Rev. B) PDF | HTML 02 Oct 2023
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
Functional safety information LM63460-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 27 Sep 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
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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 (...)
View options
Calculation tool

SNVR518 — LM63460-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
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 Download
VQFN-FCRLF (RYF) 22 View options
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