1 Features

• 4-V to 36-V Input range

• 3-A Continuous output current

• Integrated synchronous rectification

• Current-mode control

• Minimum switch on-time: 60 ns

• Internal compensation for ease of use

• 400-kHz Switching frequency and adjustable

frequency options

• PFM and forced PWM mode options

• Frequency synchronization to external clock

• 75-μA Quiescent current at no load for PFM option

• Soft start into a prebiased load

• High duty-cycle operation supported

• Precision enable input

• Output short-circuit protection with hiccup mode

• Thermal protection

• 8-Pin HSOIC with PowerPAD™ package

• 12-Pin WSON wettable flanks package with

PowerPAD™

• Use the LMZM33603 module for faster time to

market

• Create a custom design using the LMR23625 with

the WEBENCH® Power Designer

2 Applications

• Factory and building automation systems: PLC

CPU, HVAC control, elevator control

• Assest tracking

• General purpose wide VIN regulation

3 Description

The LMR23630 SIMPLE SWITCHER® is an easy-touse

36 V, 3 A synchronous step-down regulator.

With a wide input range from 4 V to 36 V, it is

suitable for various industrial applications for power

conditioning from unregulated sources. Peak-currentmode

control is employed to achieve simple controlloop

compensation and cycle-by-cycle current limiting.

A quiescent current of 75 μA makes the device

suitable for battery-powered systems. An ultra-low

2 μA shutdown current can further prolong battery

life. Internal loop compensation means that the user

is free from the tedious task of loop compensation

design. This also minimizes the external components.

The device has an option for constant frequency

FPWM mode to achieve small output-voltage ripple at

light load. An extended family (HSOIC) is available in

1-A (LMR23610) and 2.5-A (LMR23625) load-current

options in a pin-to-pin compatible package allowing

simple, optimum PCB layout. A precision enable

input allows simplification of regulator control and

system power sequencing. Protection features include

cycle-by-cycle current limit, hiccup-mode short-circuit

protection, and thermal shutdown due to excessive

power dissipation.