1 Features

1• 4-V to 36-V Input Range

• 1-A Continuous Output Current

• Integrated Synchronous Rectification

• Current Mode Control

• Minimum Switch-On Time: 60 ns

• 400-kHz Switching Frequency With PFM Mode

• Frequency Synchronization to External Clock

• Internal Compensation for Ease of Use

• 75-μA Quiescent Current at No Load

• 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

• Create a Custom Design Using the LMR23610

With the WEBENCH® Power Designer

2 Applications

• Factory and Building Automation Systems: PLC

CPU, HVAC Control, Elevator Control

• GSM, GPRS Modules for Fleet Management,

Smart Grids, and Security

• General Purpose Wide VIN Regulation

3 Description

The LMR23610 SIMPLE SWITCHER® device is an

easy-to-use 36-V, 1-A synchronous step down

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

is suitable for various applications from industrial to

automotive for power conditioning from unregulated

sources. Peak current mode control is employed to

achieve simple control loop compensation and cycleby-

cycle current limiting. A quiescent current of 75 μA

makes it 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. An extended family is available

in 2.5 A (LMR23625) and 3 A (LMR23630) loadcurrent

options in pin-to-pin compatible packages,

which allow 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.