LMQ61460

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

Product details

Rating Catalog 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, Prebias startup, Spread Spectrum, Synchronous rectification, Tracking, UVLO adjustable, Wettable flanks package Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (μA) 7 Duty cycle (max) (%) 98 Type Converter
Rating Catalog 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, Prebias startup, Spread Spectrum, Synchronous rectification, Tracking, UVLO adjustable, Wettable flanks package Control mode current mode Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Iq (typ) (μA) 7 Duty cycle (max) (%) 98 Type Converter
VQFN-HR (RJR) 14 14 mm2 4 x 3.5
  • Functional Safety-Capable
  • ZEN 2 switcher
    • 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 applications
    • Supports 42V transient
    • 0.4V dropout with 4A load (typical)
  • High efficiency power conversion at all loads
    • 7μA no load current at 13.5 VIN, 3.3 VOUT
    • 90% PFM efficiency at 1mA, 13.5 VIN, 5 VOUT
    • Low MOSFET ON resistance
      • RDS_ON_HS = 41m? (typical)
      • RDS_ON_LS = 21m? (typical)
  • External bias option for improved efficiency
  • Pin compatible with:
  • Use TPSM63606 module for faster time to market
  • Functional Safety-Capable
  • ZEN 2 switcher
    • 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 applications
    • Supports 42V transient
    • 0.4V dropout with 4A load (typical)
  • High efficiency power conversion at all loads
    • 7μA no load current at 13.5 VIN, 3.3 VOUT
    • 90% PFM efficiency at 1mA, 13.5 VIN, 5 VOUT
    • Low MOSFET ON resistance
      • RDS_ON_HS = 41m? (typical)
      • RDS_ON_LS = 21m? (typical)
  • External bias option for improved efficiency
  • Pin compatible with:
  • Use TPSM63606 module for faster time to market

The LMQ61460 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; tolerant of 42V, easing input surge protection design. The device implements soft recovery from dropout eliminating overshoot on the output.

LMQ61460 with ZEN 2 switcher technology is specifically designed for minimal EMI. 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 LMQ61460 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; tolerant of 42V, easing input surge protection design. The device implements soft recovery from dropout eliminating overshoot on the output.

LMQ61460 with ZEN 2 switcher technology is specifically designed for minimal EMI. 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.
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Technical documentation

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Type Title Date
* Data sheet LMQ61460 3V to 36V, 6A , Synchronous ZEN 2 Step-Down Converter datasheet (Rev. E) PDF | HTML 30 Oct 2025
Application note How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck PDF | HTML 16 Aug 2023
Technical article How buck regulators with integrated capacitors help lower EMI and save board space PDF | HTML 16 Mar 2022
Technical article Powering medical imaging applications with DC/DC buck converters PDF | HTML 24 Nov 2020
Functional safety information LMQ6x4x0-Q1 Functional Safety, FIT Rate, FMD, and Pin FMA (Rev. A) PDF | HTML 09 Sep 2020
Certificate LMQ61460EVM-400K EU Declaration of Conformity (DoC) 01 Sep 2020

Design & development

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

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
Not available on TI.com
Design tool

SNVR488 — LMQ61460EVM-400K Design Files

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LMQ61460 — Industrial 3-V to 36-V, 6-A, low-noise synchronous step-down converter LMQ61460-Q1 — Automotive 3-V to 36-V, 6-A low EMI synchronous step-down quiet converter with integrated capacitors
Hardware development
Evaluation board
LMQ61460EVM — 36-V, low-EMI 6-A, 5-V synchronous, 400 kHz,?step-down converter evaluation module
Design tool

SNVR493 — LMQ61460 Design Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
LMQ61460 — Industrial 3-V to 36-V, 6-A, low-noise synchronous step-down converter LMQ61460-Q1 — Automotive 3-V to 36-V, 6-A low EMI synchronous step-down quiet converter with integrated capacitors
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VQFN-HR (RJR) 14 Ultra Librarian

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