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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

Rating Automotive Topology Buck Iout (max) (A) 6 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 34 Vout (min) (V) 1 Features Enable, Fixed soft start, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Spread Spectrum, Synchronous rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000008 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
Rating Automotive Topology Buck Iout (max) (A) 6 Vin (max) (V) 36 Vin (min) (V) 3 Vout (max) (V) 34 Vout (min) (V) 1 Features Enable, Fixed soft start, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Spread Spectrum, Synchronous rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000008 Duty cycle (max) (%) 98 TI functional safety category Functional Safety-Capable
VQFN-HR (RJR) 14 14 mm² (4 mm × 3.5 mm)
  • 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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Top documentation Type Title Format options Date
* Data sheet LM61460-Q1 Automotive 3-V to 36-V, 6-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. F) PDF | HTML Jun 22, 2021
White paper Time-Saving and Cost-Effective Innovations for EMI Reduction (Rev. A) PDF | HTML Nov 28, 2023
Application note How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML Aug 16, 2023
Analog design Journal Thermal design concerns for buck converters in high‐power automotive apps (Rev. A) PDF | HTML Jun 7, 2023
White paper Demystifying Input Supply Current in DC/DC Regulators:From Shutdown to Full Load (Rev. A) PDF | HTML Jun 6, 2023
Application note Using the LM61460-Q1 and LM61495-Q1 in USB Type-C Applications PDF | HTML Dec 15, 2021
More literature Advanced Power-Converter Features for Reducing EMI PDF | HTML Dec 7, 2021
Application note How to Migrate Between LM614xx and LM624xx Product Families PDF | HTML Nov 1, 2021
Functional safety information LM614xx-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. B) PDF | HTML Sep 15, 2021
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML Jul 26, 2021
Technical article Powering levels of autonomy: a quick guide to DC/DC solutions for SAE autonomy lev PDF | HTML Nov 18, 2020
Application note PCB Thermal Design Tips for Automotive DC/DC Converters PDF | HTML Nov 12, 2020
Technical article How device-level features and package options can help minimize EMI in automotive PDF | HTML Aug 21, 2020
Technical article Optimizing flip-chip IC thermal performance in automotive designs PDF | HTML Dec 11, 2019
Technical article Powering infotainment systems of the future PDF | HTML Oct 7, 2019
Technical article How to meet European Commission ADAS requirements with TI DC/DC converters PDF | HTML May 9, 2019
Technical article Effects of IC package on EMI performance PDF | HTML May 22, 2018
Technical article Designing USB into challenging automotive applications PDF | HTML Apr 4, 2018
Application note Designing High Performance, Low-EMI, Automotive Power Supplies Sep 30, 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
Supported products & hardware
Simulation model

LM61460AAN-Q1 PSpice Transient Model (Rev. A)

SNVMBW2A.ZIP (99 KB) - PSpice model
Supported products & hardware
Simulation model

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

SNVMBX4A.TSC (187 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

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

SNVMBX5A.TSC (176 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

LM61460AAS-Q1 PSpice Average Model

SNVMC61.ZIP (273 KB) - PSpice model
Supported products & hardware
Simulation model

LM61460AAS-Q1 PSpice Transient Model (Rev. A)

SNVMBW0A.ZIP (98 KB) - PSpice model
Supported products & hardware
Simulation model

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

SNVMBX2A.TSC (187 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

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

SNVMBX3A.TSC (176 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

LM61460AFS-Q1 PSpice Transient Model (Rev. A)

SNVMBW1A.ZIP (106 KB) - PSpice model
Supported products & hardware
Simulation model

LM61460AFS-Q1 TINA-TI Startup Transient Model

SNVMC09.TSC (188 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

LM61460AFS-Q1 TINA-TI Steady State Transient Model

SNVMC10.TSC (177 KB) - TINA-TI Spice model
Supported products & hardware
Calculation tool

SNVR479 — LM61460 Design Tool

Supported products & hardware
Reference design

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 (...)
Supported products & hardware
Reference design

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 (...)
Supported products & hardware
Reference design

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)
Supported products & hardware
Reference design

TIPA-050009 — AM62x discrete power-supply solution with DDR4

This power-supply design describes the power tree for the AM62x processor using low cost discrete voltage regulators and details the specific power up/down sequencing requirement of the different voltage rails of the AM62x.

 

The AM62x is an extension of the Sitara™ industrial grade family of (...)

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
VQFN-HR (RJR) 14 Ultra Librarian
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Ordering & quality

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