LM61460-Q1

ACTIVE

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

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 Iq (typ) (µA) 8 Duty cycle (max) (%) 98
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 Iq (typ) (µA) 8 Duty cycle (max) (%) 98
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) PDF | HTML 22 Jun 2021
White paper Time-Saving and Cost-Effective Innovations for EMI Reduction (Rev. A) PDF | HTML 28 Nov 2023
Application note How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 16 Aug 2023
Analog Design Journal Thermal design concerns for buck converters in high‐power automotive apps (Rev. A) PDF | HTML 07 Jun 2023
Application note Using the LM61460-Q1 and LM61495-Q1 in USB Type-C Applications PDF | HTML 15 Dec 2021
More literature Advanced Power-Converter Features for Reducing EMI PDF | HTML 07 Dec 2021
Application note How to Migrate Between LM614xx and LM624xx Product Families PDF | HTML 01 Nov 2021
Functional safety information LM614xx-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. B) PDF | HTML 15 Sep 2021
EVM User's guide LM61460-Q1 EVM User's Guide (Rev. D) PDF | HTML 30 Jul 2021
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML 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 lev 18 Nov 2020
Application note PCB Thermal Design Tips for Automotive DC/DC Converters PDF | HTML 12 Nov 2020
Technical article How device-level features and package options can help minimize EMI in automotive PDF | HTML 21 Aug 2020
Technical article Optimizing flip-chip IC thermal performance in automotive designs PDF | HTML 11 Dec 2019
Technical article Powering infotainment systems of the future PDF | HTML 07 Oct 2019
Technical article How to meet European Commission ADAS requirements with TI DC/DC converters PDF | HTML 09 May 2019
Technical article Effects of IC package on EMI performance PDF | HTML 22 May 2018
Technical article Designing USB into challenging automotive applications PDF | HTML 04 Apr 2018
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.
User guide: PDF | HTML
Simulation model

LM61460AAN-Q1 PSpice Transient Model (Rev. A)

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

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

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

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

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

LM61460AAS-Q1 PSpice Average Model

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

LM61460AAS-Q1 PSpice Transient Model (Rev. A)

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

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

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

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

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

LM61460AFS-Q1 PSpice Transient Model (Rev. A)

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

LM61460AFS-Q1 TINA-TI Startup Transient Model

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

LM61460AFS-Q1 TINA-TI Steady State Transient Model

SNVMC10.TSC (177 KB) - TINA-TI Spice Model
Calculation tool

SNVR479 LM61460 Design Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LM61440 3-V to 36-V, 4-A, low-noise synchronous step-down converter LM61460 3-V to 36-V, 6-A, Low-EMI synchronous step-down converter LM61460-Q1 Automotive 3-V to 36-V, 6-A, low-noise synchronous step-down converter
PCB layout

LM61460 EVM Design Files

SNVR478.ZIP (5000 KB)
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)
Test report: PDF
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 (...)
Test report: PDF
Schematic: PDF
Reference designs

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

This reference design uses an LM61460-Q1 synchronous buck regulator that provides current of 6 A to two TPS2557-Q1 load switch channels to provide 30 W of total power to dual USB Type-C® charge ports. This is designed for high-power efficiency and thermal performance and comes in a small size. The (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
VQFN-HR (RJR) 14 Ultra Librarian

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

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