3-V to 36-V, 6-A, Low-EMI synchronous step-down converter


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) 9 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Soft Start Adjustable, Spread Spectrum, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN-HR (RJR) 14 14 mm² 4 x 3.5 open-in-new Find other Buck converters (integrated switch)


  • Functional Safety-Capable
  • Optimized for ultra low EMI requirements
    • Hotrod™ package and parallel input path minimize switch node ringing
    • Adjustable SW node rise time
  • Designed for reliable and rugged applications
    • Supports 42-V transients
    • ±1% total output regulation accuracy
    • VOUT adjustable from 1 V to 95% of VIN
    • 0.4-V dropout with 4-A load (typical)
    • Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-citcuit protection
  • 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
    • Low MOSFET ON resistance
      • RDS_ON_HS = 41 mΩ (typical)
      • RDS_ON_LS = 21 mΩ (typical)
    • External bias option for improved efficiency
  • Suitable for scalable power supplies
    • Pin compatible with:
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The LM61460 is a 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 implements soft recovery from dropout eliminating overshoot on the output.

The LM61460 is specifically designed for minimal EMI. The device incorporates 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.

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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Type Title Date
* Data sheet LM61460 3-V to 36-V, 6-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. C) Jun. 22, 2021
User guide LM61460-Q1 EVM User's Guide (Rev. D) Jul. 30, 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Functional safety information LM61x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA Oct. 08, 2020
Technical article Keeping the brain cool: how to use high-power DC/DCs in single-board computer designs Feb. 28, 2020
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Hardware development

document-generic User guide
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.
  • Spread spectrum operation
  • Controlled recover from dropout
  • Low operating quiescent current
  • High efficiency
  • Low minimum on-time
  • Adjustable rise time

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SNVR479.ZIP (745 KB)
SNVR478.ZIP (5000 KB)

Reference designs

USB Type-C® dual-buck reference design
PMP22416 — 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 V (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
VQFN-HR (RJR) 14 View options

Ordering & quality

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