1 Features

1• 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

2 Applications

• Industrial distributed power applications

• Test and measurement

• General-purpose wide VIN applications

3 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 easyto-

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.