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LM73606-Q1

ACTIVE

Automotive qualified 3.5-V to 36-V, 6-A synchronous step-down voltage converter

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Data sheet

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LM61460-Q1 ACTIVE Automotive 3-V to 36-V, 6-A, low-noise synchronous step-down converter Smaller package, higher performance
LM63460-Q1 ACTIVE Automotive 3-V to 36-V, 6-A, low EMI synchronous step-down converter in enhanced QFN package Smaller solution size, higher efficiency at light load, lower EMI with HotRod™ QFN packaging and spread spectrum.

LM73606-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Buck Iout (max) (A) 6 Vin (max) (V) 36 Vin (min) (V) 3.5 Vout (max) (V) 34 Vout (min) (V) 1 Features Adjustable soft start, Enable, Forced PWM, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Prebias startup, Synchronous rectification, Tracking, UVLO fixed, Wettable flanks package Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000015 Duty cycle (max) (%) 96
Rating Automotive Topology Buck Iout (max) (A) 6 Vin (max) (V) 36 Vin (min) (V) 3.5 Vout (max) (V) 34 Vout (min) (V) 1 Features Adjustable soft start, Enable, Forced PWM, Frequency synchronization, Light-load efficiency, Overcurrent protection, Power good, Prebias startup, Synchronous rectification, Tracking, UVLO fixed, Wettable flanks package Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000015 Duty cycle (max) (%) 96
WQFN (RNP) 30 24 mm² (6 mm × 4 mm)
  • 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
  • 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

The LM73605-Q1/LM73606-Q1family 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, 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 lookout, cycle-cy-cycle current limiting, and hiccup short-citcuit protection. The LM73605-Q1 and LM73606-Q1 devices are pin-to-pin compatible for easy current scaling.

The LM73605-Q1/LM73606-Q1family 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, 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 lookout, cycle-cy-cycle current limiting, and hiccup short-citcuit 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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Top documentation Type Title Format options Date
* Data sheet LM7360x-Q1 3.5-V to 36-V, 5-A or 6-A Synchronous Step-Down Voltage Converter datasheet (Rev. B) PDF | HTML May 14, 2021
Functional safety information LM73606-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML Jul 12, 2022
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML Jul 26, 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr 8, 2021
Technical article Optimizing flip-chip IC thermal performance in automotive designs PDF | HTML Dec 11, 2019
Technical article How to meet European Commission ADAS requirements with TI DC/DC converters PDF | HTML May 9, 2019
Technical article A review of EMI standards, part 1 – conducted emissions PDF | HTML Jun 28, 2018
Application note Designing High Performance, Low-EMI, Automotive Power Supplies Sep 30, 2017

Design & development

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

Evaluation board

LM73606EVM-5V-400K — LM73606 Synchronous Step-Down Converter Evaluation Module

The LM73606EVM-5V-400K evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM73606 synchronous step-down voltage converter. The EVM operates from 6V to 36V input and provides a 5V output voltage with 6A maximum load current.

User guide: PDF
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Simulation model

LM73606 Non-Inverting and Inverting PSpice Transient Model

SNVMBE5.ZIP (240 KB) - PSpice model
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Simulation model

LM73606 Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMBE4.ZIP (8 KB) - PSpice model
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Calculation tool

SNVR524 — LM73605 Quickstart Tool

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
WQFN (RNP) 30 Ultra Librarian
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