LM73605-Q1

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Automotive Qualified 3.5V to 36V, 5A Synchronous Step-Down Voltage Converter

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Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 34 Iout (Max) (A) 5 Iq (Typ) (mA) 0.015 Switching frequency (Min) (kHz) 350 Switching frequency (Max) (kHz) 2200 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, Wettable Flanks Package Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

WQFN (RNP) 30 24 mm² 6 x 4 open-in-new Find other Buck converters (integrated switch)

Features

  • AEC-Q100 Qualified for Automotive Applications
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2 kV
    • Device CDM ESD Classification Level C5
  • Wettable Flanks QFN Package (WQFN)
  • Low EMI and Low Switching Noise
  • Low Quiescent Current
    • 0.8 µA in Shutdown (typical)
    • 15 µA in Active Mode With No Load (typical)
  • Wide Voltage Conversion Range:
    • tON-MIN = 60 ns (typical)
    • tOFF-MIN = 70 ns (typical)
  • Low MOSFET ON-Resistance:
    • RDS_ON_HS = 53 mΩ (typical)
    • RDS_ON_LS = 31 mΩ (typical)
  • Adjustable Frequency Range: 350 kHz to 2.2 MHz
  • Pin-Selectable Auto Mode or Forced PWM Mode
  • Start-up into Pre-Biased Load, Fixed or Adjustable Soft-Start Time, and Tracking
  • Synchronizable to External Clock, Internal Compensation, Power-Good Flag, and Precision Enable
  • Cycle-by-Cycle Current Limiting, Hiccup, UVLO, and Thermal Shutdown Protections
  • Create a Custom Design With the WEBENCH® Power Designer using LM73605-Q1 or LM73606-Q1

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Description

The LM73605-Q1/LM73606-Q1 family of devices are easy-to-use synchronous step-down DC-DC converters capable of driving up to 5 A (LM73605-Q1) or 6 A (LM73606-Q1) of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605-Q1/LM73606-Q1 provide exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization to an external clock, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load and optional external bias improve efficiency over the entire load range. The family requires few external components and has a pinout designed for simple PCB layout with optimal EMI and thermal performance. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limiting, and hiccup short-circuit protection. The LM73605-Q1 and LM73606-Q1 devices are pin-to-pin compatible for easy current scaling.

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Technical documentation

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Type Title Date
* Datasheet LM7360x-Q1 3.5-V to 36-V, 5-A or 6-A Synchronous Step-Down Voltage Converter datasheet (Rev. A) Dec. 19, 2018
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 2018
Application notes Designing High Performance, Low-EMI, Automotive Power Supplies Sep. 30, 2017
User guides LM73605/LM73606 EVM User's Guide Sep. 20, 2017

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
$49.00
Description
The LM73605EVM-5V-2MHZ evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM73605 synchronous step-down voltage converter. The EVM operates from 6V to 36V input and provides a 5V output voltage with 5A maximum load current.
Features
  • High Efficiency at light loads and heavy loads
  • Synchronous Rectification
  • Wide-Input Voltage Range
  • Auto mode or FPWM mode
  • Frequency Synchronization
  • Low Quiescent Current
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

The LM73605EVM-5V-400K evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM73605 synchronous step-down voltage converter. The EVM operates from 6V to 36V input and provides a 5V output voltage with 5A maximum load current.

Features
  • High Efficiency at light loads and heavy loads
  • Synchronous Rectification
  • Wide-Input Voltage Range
  • Auto mode or FPWM mode
  • Frequency Synchronization
  • Low Quiescent Current

Design tools & simulation

SIMULATION MODELS Download
SNVJ003.ZIP (9 KB) - Spice Model
SIMULATION MODELS Download
SNVMBD7.ZIP (955 KB) - PSpice Model
SIMULATION MODELS Download
SNVMBE0.TSC (2316 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVMBE1.ZIP (79 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVMBL7.ZIP (4 KB) - TINA-TI Reference Design
GERBER FILES Download
SNVC227.ZIP (40 KB)

Reference designs

REFERENCE DESIGNS Download
ADAS power reference design with improved voltage supervision
TIDA-050008 This TI design provides an automotive power solution with additional precision voltage supervision and window watchdog for safety MCUs in advanced driver assistance systems (ADAS). These ADAS systems can control driving functions, such as automated emergency brake, lane keep assist, and adaptive (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Integrated Power Front End and Multi-Phase Processor Supply Automotive Reference Design
TIDA-01492 — This processor supply reference design is an automotive power solution for use in high performance, single-core-voltage application processors in advanced driver assistance systems (ADASs). This design can support core supply currents up to 10 A at 0.9 V. The design can also operate with a wide (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WQFN (RNP) 30 View options

Ordering & quality

Support & training

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