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.