3.5V to 36V, 5A Synchronous Step-Down Voltage Converter
Product details
Parameters
Package | Pins | Size
Features
- 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:
- 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)
- 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
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Description
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM73605/LM73606 3.5-V to 36-V, 5-A or 6-A Synchronous Step-Down Voltage Converter datasheet (Rev. A) | Jul. 21, 2017 |
Selection guide | 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 | |
Technical articles | How to add hysteresis to a DC/DC converter | Nov. 12, 2018 | |
Application note | Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems | Sep. 10, 2018 | |
Technical articles | Effects of IC package on EMI performance | May 22, 2018 | |
Technical articles | Vary the output voltage in an inverting buck-boost topology | Oct. 12, 2017 | |
Application note | Designing High Performance, Low-EMI, Automotive Power Supplies | Sep. 30, 2017 | |
User guide | 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
Description
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
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
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
- (...)
Reference designs
Design files
-
download TIDA-010011 BOM.pdf (134KB) -
download TIDA-010011 Assembly Drawing.pdf (1564KB) -
download TIDA-010011 PCB.pdf (4603KB) -
download TIDA-010011 CAD Files.zip (7015KB) -
download TIDA-010011 Gerber.zip (799KB)
Design files
-
download TIDA-01458 BOM.pdf (197KB) -
download TIDA-01458 Assembly Drawing.pdf (305KB) -
download TIDA-01458 PCB.pdf (1425KB) -
download TIDA-01458 CAD Files.zip (3206KB) -
download TIDA-01458 Gerber.zip (1681KB)
Design files
-
download PMP11670 BOM.pdf (176KB) -
download PMP11670 Assembly Drawing.pdf (89KB) -
download PMP11670 PCB.pdf (728KB) -
download PMP11670 CAD Files.zip (596KB) -
download PMP11670 Gerber.zip (306KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
WQFN (RNP) | 30 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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