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LM61460-Q1

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

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Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 6 Iq (Typ) (mA) 0.008 Iq (Typ) (uA) 8 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 Operating temperature range (C) -40 to 150 Rating Automotive 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)

Features

  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +150°C, TJ
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Optimized for ultra low EMI requirements
    • Hotrod™ package minimizes switch node ringing
    • Parallel input path minimizes parasitic inductance
    • 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

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Description

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 qualified to automotive AEC-Q100 grade 1 and 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

Design & development

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

Hardware development

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

Design tools & simulation

SIMULATION MODELS Download
SNVMBW0A.ZIP (98 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBW1A.ZIP (106 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBW2A.ZIP (99 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBX2A.TSC (187 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVMBX3A.TSC (176 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVMBX4A.TSC (187 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVMBX5A.TSC (176 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVMC09.TSC (188 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVMC10.TSC (177 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
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 (...)
Features
  • 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
  • (...)
CALCULATION TOOLS Download
SNVR479.ZIP (745 KB)
PCB LAYOUTS Download
SNVR478.ZIP (5000 KB)

Reference designs

REFERENCE DESIGNS Download
High efficiency, low-noise 5-V/3.3-V/1.8-V/1.1-V automotive display reference design
PMP22334 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
30-W power for automotive dual USB Type-C™ charge port reference design
PMP21771 — This reference design employs an LM61460-Q1 synchronous buck regulator that provides a total of 6 A of current to two TPS2557-Q1 load switch channels to provide 30W of total power to dual USB Type-C charge ports. The system is designed for high power efficiency and thermal performance and comes in a (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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

Ordering & quality

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