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LM61460-Q1

ACTIVE

Automotive 3-V to 36-V, 6-A, low-noise synchronous step-down converter

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Data sheet

LM61460-Q1

ACTIVE
Data sheet Order now

Product details

Vin (Min) (V) 3 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 6 Iq (Typ) (uA) 8 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 Operating temperature range (C) -40 to 150 Rating Automotive Regulated outputs (#) 1
Vin (Min) (V) 3 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 6 Iq (Typ) (uA) 8 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 Operating temperature range (C) -40 to 150 Rating Automotive Regulated outputs (#) 1
VQFN-HR (RJR) 14 14 mm² 4 x 3.5
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, TJ
  • Functional Safety-Capable
  • Optimized for ultra low EMI requirements
    • Hotrod™ package and parallel input path minimize switch node ringing
    • Spread spectrum reduces peak emissions
    • Adjustable SW node rise time
  • Designed for automotive applications
    • Supports 42-V automotive load dump
    • ±1% total output regulation accuracy
    • VOUT adjustable from 1 V to 95% of VIN
    • 0.4-V dropout with 4-A load (typical)
  • High efficiency power conversion at all loads
    • 7-µA no load current at 13.5 VIN, 3.3 VOUT
    • 83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
    • External bias option for improved efficiency
  • Suitable for scalable power supplies
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, TJ
  • Functional Safety-Capable
  • Optimized for ultra low EMI requirements
    • Hotrod™ package and parallel input path minimize switch node ringing
    • Spread spectrum reduces peak emissions
    • Adjustable SW node rise time
  • Designed for automotive applications
    • Supports 42-V automotive load dump
    • ±1% total output regulation accuracy
    • VOUT adjustable from 1 V to 95% of VIN
    • 0.4-V dropout with 4-A load (typical)
  • High efficiency power conversion at all loads
    • 7-µA no load current at 13.5 VIN, 3.3 VOUT
    • 83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
    • External bias option for improved efficiency
  • Suitable for scalable power supplies

The LM61460-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 6 A of output current is delivered over a wide input range of 3.0 V to 36 V; tolerant of 42 V, easing input surge protection design. The LM61460-Q1 implements soft recovery from dropout eliminating overshoot on the output.

The LM61460-Q1 is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range.

The LM61460-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 6 A of output current is delivered over a wide input range of 3.0 V to 36 V; tolerant of 42 V, easing input surge protection design. The LM61460-Q1 implements soft recovery from dropout eliminating overshoot on the output.

The LM61460-Q1 is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range.
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Technical documentation

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Type Title Date
* Data sheet LM61460-Q1 Automotive 3-V to 36-V, 6-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. F) 22 Jun 2021
Application note Using the LM61460-Q1 and LM61495-Q1 in USB Type-C Applications 15 Dec 2021
Application note How to Migrate Between LM614xx and LM624xx Product Families 01 Nov 2021
Functional safety information LM614xx-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. B) 15 Sep 2021
User guide LM61460-Q1 EVM User's Guide (Rev. D) 30 Jul 2021
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) 26 Jul 2021
White paper 透過節省時間和成本的創新技術 降低電源中的EMI 04 Dec 2020
White paper 전원 공급 장치의 EMI 절감을 위한 시간 및 비용 효율적 혁신 04 Dec 2020
Technical article Powering levels of autonomy: a quick guide to DC/DC solutions for SAE autonomy levels 18 Nov 2020
Application note PCB Thermal Design Tips for Automotive DC/DC Converters 12 Nov 2020
White paper Time-Saving and Cost-Effective Innovations for EMI Reduction 11 Nov 2020
Technical article How device-level features and package options can help minimize EMI in automotive designs 21 Aug 2020
White paper Demystifying Input Supply Current in DC/DC Regulators:From Shutdown to Full Load 18 May 2020
Analog design journal Thermal design concerns for buck converters in high‐power automotive apps 19 Mar 2020
Technical article Optimizing flip-chip IC thermal performance in automotive designs 11 Dec 2019
Technical article Powering infotainment systems of the future 07 Oct 2019
Application note Designing High Performance, Low-EMI, Automotive Power Supplies 30 Sep 2017

Design & development

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

Evaluation board

LM61460EVM — 36-V, low EMI 6-A, 5-V synchronous, 400-kHz, step-down converter evaluation module

The LM61460 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM61460 synchronous step-down converter.  The LM61460 provides exceptional efficiency, low IQ, and low EMI in small solution size.
document-pdfAcrobat User guide
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Simulation model

LM61460AAS-Q1 PSpice Transient Model (Rev. A)

SNVMBW0A.ZIP (98 KB) - PSpice Model
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Simulation model

LM61460AFS-Q1 PSpice Transient Model (Rev. A)

SNVMBW1A.ZIP (106 KB) - PSpice Model
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Simulation model

LM61460AAN-Q1 PSpice Transient Model (Rev. A)

SNVMBW2A.ZIP (99 KB) - PSpice Model
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Simulation model

LM61460AAS-Q1 TINA-TI Startup Transient Model (Rev. A)

SNVMBX2A.TSC (187 KB) - TINA-TI Spice Model
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Simulation model

LM61460AAS-Q1 TINA-TI Steady State Transient Model (Rev. A)

SNVMBX3A.TSC (176 KB) - TINA-TI Spice Model
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Simulation model

LM61460AAN-Q1 TINA-TI Startup Transient Model (Rev. A)

SNVMBX4A.TSC (187 KB) - TINA-TI Spice Model
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Simulation model

LM61460AAN-Q1 TINA-TI Steady State Transient Model (Rev. A)

SNVMBX5A.TSC (176 KB) - TINA-TI Spice Model
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Simulation model

LM61460AFS-Q1 TINA-TI Startup Transient Model

SNVMC09.TSC (188 KB) - TINA-TI Spice Model
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Simulation model

LM61460AFS-Q1 TINA-TI Steady State Transient Model

SNVMC10.TSC (177 KB) - TINA-TI Spice Model
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Simulation model

LM61460AAS-Q1 PSpice Average Model

SNVMC61.ZIP (273 KB) - PSpice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Calculation tool

LM61460 Design Tool

SNVR479.ZIP (745 KB)
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PCB layout

LM61460 EVM Design Files

SNVR478.ZIP (5000 KB)
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Reference designs

PMP30930 — EMI-optimized buck reference design

This reference design consists of three separable boards optimized for low EMI.

The three boards are labeled

  • PMP30930 Part A (using LM63635-Q1, PW package)
  • PMP30930 Part B (using LM63635-Q1, DR package)
  • PMP30930 Part C (Using LM61460-Q1)
Reference designs

PMP22416 — USB Type-C® dual-buck reference design

This reference design is a USB Type-C® dual-output buck with 65-W output power and 98.8% efficiency. The design uses two LM61460 buck converters to step down a 21-V input and includes a 5-V bias voltage input to maximize efficiency. The USB Type-C design offers dual-output voltages of 5 V, 9 V, 15 (...)
document-pdfAcrobat Schematic
Reference designs

PMP22334 — High efficiency, low-noise 5-V/3.3-V/1.8-V/1.1-V automotive display reference design

This reference design is for an automotive display application with a customized form factor. The design demonstrates the excellent thermal performance of LM61460-Q1 with its HotRod™ QFN package as well as the low EMI aided by its spread spectrum feature. It generates four (...)
document-pdfAcrobat Schematic
Reference designs

PMP21771 — 30-W power for automotive dual USB Type-C™ charge port reference design

This reference design employs an LM61460-Q1 synchronous buck regulator that provides a total of 6 A of current to two TPS2557-Q1 load switch channels to provide 30W of total power to dual USB Type-C charge ports. The system is designed for high power efficiency and thermal performance and comes in (...)
document-pdfAcrobat Schematic
Package Pins Download
VQFN-HR (RJR) 14 View options

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