LM73606

WQFN (RNP)

30

24 mm² 6 x 4

New product available: LM61460 60-V, 6-A synchronous converter
Synchronous rectification
Wettable flanks QFN package (WQFN)
Low quiescent current
- 0.8 µA in shutdown (typical)
- 15 µA in active mode with no load (typical)
Wide voltage conversion range:
- t_ON-MIN = 60 ns (typical)
- t_OFF-MIN = 70 ns (typical)
Low MOSFET ON-resistance:
- R_{DS_ON_HS} = 53 mΩ (typical)
- R_{DS_ON_LS} = 31 mΩ (typical)
External bias input to improve efficiency
Pin-selectable auto mode or forced PWM operation
Adjustable frequency range: 350 kHz to 2.2 MHz
Synchronizable to external clock
Internal compensation
Power-good flag
Precision enable to program system UVLO
Flexible soft-start features:
- Start-up into pre-biased load
- Fixed or adjustable soft-start time
- Output voltage tracking
Cycle-by-cycle current limiting
Short-circuit protection with hiccup mode
Create a custom design with the WEBENCH^® power designer using LM73605 or LM73606

New product available: LM61460 60-V, 6-A synchronous converter
Synchronous rectification
Wettable flanks QFN package (WQFN)
Low quiescent current
- 0.8 µA in shutdown (typical)
- 15 µA in active mode with no load (typical)
Wide voltage conversion range:
- t_ON-MIN = 60 ns (typical)
- t_OFF-MIN = 70 ns (typical)
Low MOSFET ON-resistance:
- R_{DS_ON_HS} = 53 mΩ (typical)
- R_{DS_ON_LS} = 31 mΩ (typical)
External bias input to improve efficiency
Pin-selectable auto mode or forced PWM operation
Adjustable frequency range: 350 kHz to 2.2 MHz
Synchronizable to external clock
Internal compensation
Power-good flag
Precision enable to program system UVLO
Flexible soft-start features:
- Start-up into pre-biased load
- Fixed or adjustable soft-start time
- Output voltage tracking
Cycle-by-cycle current limiting
Short-circuit protection with hiccup mode
Create a custom design with the WEBENCH^® power designer using LM73605 or LM73606

The LM73605 and LM73606 family of devices are easy-to-use synchronous step-down DC/DC converters capable of driving up to 5 A or 6 A of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605 and LM73606 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 improves efficiency over the entire load range. Protection features include thermal shutdown, cycle-by-cycle current limiting, and short-circuit protection. The devices are pin-to-pin compatible for easy current scaling. The new product, LM61460-Q1, offers higher efficiency, lower stand-by quiescent current, and improved EMI performance. See the device comparison table to compare specifications. Start a Webench design with LM61460-Q1. Use the LMZM33606 module for faster time to market.

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LM61460

ACTIVE

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

Technical documentation

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	Type	Title	Date
*	Data sheet	LM73605/LM73606 3.5-V to 36-V, 5-A or 6-A Synchronous Step-Down Voltage Converter datasheet (Rev. A)	21 Jul 2017
	Selection guide	Buck Converter Quick Reference Guide (Rev. B)	08 Apr 2021
	Test report	Automotive Wide-VIN to Point-of-Load Power Supply Reference Design (Rev. A)	26 Mar 2020
	Technical article	Minimize the impact of the MLCC shortage on your power application	29 Mar 2019
	White paper	Power modules for lab instrumentation	18 Oct 2018
	User guide	LM73605/LM73606 EVM User's Guide	20 Sep 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

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Simulation model

LM73606 Unencrypted Non-Inverting and Inverting PSpice Transient Model

SNVMBE4.ZIP (8 KB) - PSpice Model

Simulation model

LM73606 Non-Inverting and Inverting PSpice Transient Model

SNVMBE5.ZIP (240 KB) - PSpice Model

Simulation model

TINA-TI Enable Hysteresis Schematic

SNVMBL7.ZIP (4 KB) - TINA-TI Reference Design

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)

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Gerber file

DC/DC Converter Enable Hysteresis Calculator

SNVC227.ZIP (40 KB)

Reference designs

PMP15023 — Automotive wide-VIN to point-of-load power supply with front-end circuit protection reference design

This automotive point-of-load power supply reference design features complete front-end protection in a small overall solution size. The system can clamp fast high-voltage electrical transients and maintain operation through these events. It can also properly respond to a reverse battery polarity (...)

Reference designs

TIDA-010011 — High efficiency power supply architecture reference design for protection relay processor module

This reference design showcases various power architectures for generating multiple voltage rails for an application processor module, requiring >1A load current and high efficiency . The required power supply is generated using 5-, 12- or 24-V DC input from the backplane. Power supplies are (...)

Reference designs

PMP40286 — Automotive USB Type-C™ DFP 5V 3A + USB Type-A 5V 2.4A Charger Reference Design

PMP40286 is a dual port car charger reference design. The output goes to a 5V 3A USB Type-C™ port and a 5V 2.4A USB type-A port. The USB Type-C port can be backwards compliant with BC1.2 and DCP configurations. The type-A port is capable of compensating for the effects on voltage droop (...)

Reference designs

PMP40285 — Automotive Dual Port USB Type-C™ DFP 5V 3A Charger Reference Design

PMP40285 is a dual port USB Type-C™ charger reference design. This design takes an automotive input voltage, the output goes to two USB Type-C port. Each of these ports supplies 5V 3A for USB Type-C™ device. The design is fully compliant with USB type C and backwards compliant with (...)