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LMQ61460-Q1

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Automotive 3-V to 36-V, 6-A low EMI synchronous step-down quiet converter with integrated capacitors

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Data sheet

LMQ61460-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, Forced PWM, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Spread Spectrum, Synchronous rectification, Wettable flanks package EMI features Fixed-frequency control, Integrated capacitors, Low parasitic packaging, Mitigated interference & noise technology – architecture 2 (MINT 2), Pinout optimization, Spread Spectrum, Switch-node waveshaping Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000007 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, Forced PWM, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Spread Spectrum, Synchronous rectification, Wettable flanks package EMI features Fixed-frequency control, Integrated capacitors, Low parasitic packaging, Mitigated interference & noise technology – architecture 2 (MINT 2), Pinout optimization, Spread Spectrum, Switch-node waveshaping Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000007 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
  • Mitigated interference and noise technology – architecture 2 (MINT 2)
    • Meets CISPR25 class 5 standard
    • HotRod™ package minimizes switch node ringing
    • Internal bypass capacitors reduce EMI
    • Parallel input path minimizes parasitic inductance
    • Spread spectrum reduces peak emissions
    • Adjustable switch node rise time
  • Designed for rugged automotive applications
    • Supports 42V load dump
    • 0.4V dropout with 4A load (typical)
  • High efficiency power conversion at all loads
    • 7µA no load current at 13.5VIN, 3.3 VOUT
    • 90% PFM efficiency at 1mA, 13.5VIN, 5 VOUT
  • External bias option for improved efficiency
  • Pin compatible with:
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, TJ
  • Functional Safety-Capable
  • Mitigated interference and noise technology – architecture 2 (MINT 2)
    • Meets CISPR25 class 5 standard
    • HotRod™ package minimizes switch node ringing
    • Internal bypass capacitors reduce EMI
    • Parallel input path minimizes parasitic inductance
    • Spread spectrum reduces peak emissions
    • Adjustable switch node rise time
  • Designed for rugged automotive applications
    • Supports 42V load dump
    • 0.4V dropout with 4A load (typical)
  • High efficiency power conversion at all loads
    • 7µA no load current at 13.5VIN, 3.3 VOUT
    • 90% PFM efficiency at 1mA, 13.5VIN, 5 VOUT
  • External bias option for improved efficiency
  • Pin compatible with:

The LMQ61460-Q1 is a high-performance, DC-DC synchronous buck converter with integrated bypass capacitors. With integrated high-side and low-side MOSFETs, up to 6A of output current is delivered over a wide input range of 3.0V to 36V; 42V tolerance supports load dump for durations of 400ms. The device implements soft recovery from dropout eliminating overshoot on the output.

The LMQ61460-Q1 is designed with mitigated interference and noise technology using architecture 2 features (MINT 2) to quickly and easily implement a low-EMI design. The device incorporates pseudo-random spread spectrum, integrated bypass capacitors, 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 synchronized between 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller design size at high operating frequency.

Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7µA (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, makes sure of exceptional efficiency across the entire load range.

The device is available in a 14-pin VQFN-HR package with wettable flanks. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.

The LMQ61460-Q1 is a high-performance, DC-DC synchronous buck converter with integrated bypass capacitors. With integrated high-side and low-side MOSFETs, up to 6A of output current is delivered over a wide input range of 3.0V to 36V; 42V tolerance supports load dump for durations of 400ms. The device implements soft recovery from dropout eliminating overshoot on the output.

The LMQ61460-Q1 is designed with mitigated interference and noise technology using architecture 2 features (MINT 2) to quickly and easily implement a low-EMI design. The device incorporates pseudo-random spread spectrum, integrated bypass capacitors, 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 synchronized between 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller design size at high operating frequency.

Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7µA (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, makes sure of exceptional efficiency across the entire load range.

The device is available in a 14-pin VQFN-HR package with wettable flanks. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.
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Technical documentation

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* Data sheet LMQ61460-Q1 Automotive 3V to 36V, 6A , Synchronous Step-Down Converter With Mitigated Interference and Noise Technology (MINT) datasheet (Rev. D) PDF | HTML Aug 4, 2026
Application note How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML Aug 16, 2023
White paper Understanding the trade-offs and technologies to increase power density (Rev. C) PDF | HTML Apr 14, 2023
Technical article How buck regulators with integrated capacitors help lower EMI and save board space PDF | HTML Mar 16, 2022
More literature Advanced Power-Converter Features for Reducing EMI PDF | HTML Dec 7, 2021
Functional safety information LMQ6x4x0-Q1 Functional Safety, FIT Rate, FMD, and Pin FMA (Rev. A) PDF | HTML Sep 9, 2020
Technical article How device-level features and package options can help minimize EMI in automotive PDF | HTML Aug 21, 2020
Functional safety information Streamlining Functional Safety Certification in Automotive and Industrial Jun 9, 2020

Design & development

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Evaluation board

LMQ61460EVM — 36-V, low-EMI 6-A, 5-V synchronous, 400 kHz, step-down converter evaluation module

The LMQ61460EVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMQ61460-Q1 synchronous step-down converter.  The LMQ61460-Q1 provides exceptional efficiency, low Iq, and low EMI in small solution size with integrated capacitors.
User guide: PDF | HTML
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Simulation model

LMQ61460AAS-Q1 PSpice Transient Model

SNVMC21.ZIP (112 KB) - PSpice model
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Simulation model

LMQ61460AFS-Q1 PSpice Transient Model

SNVMC23.ZIP (131 KB) - PSpice model
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Design tool

SNVR488 — LMQ61460EVM-400K Design Files

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Design tool

SNVR493 — LMQ61460 Design Tool

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VQFN-HR (RJR) 14 Ultra Librarian
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