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LMR23630

SNVSAH2B – DECEMBER 2015 – REVISED APRIL 2017

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7 Detailed Description

7.1 Overview

operating from 4.5 V to 36 V supply voltage. It is capable of delivering up to 3 A DC load current with good

thermal performance in a small solution size. An extended family is available in multiple current options from 1 A

to 3 A in pin-to-pin compatible packages.

The LMR23630 employs fixed frequency peak current mode control. The device enters PFM mode at light load to

achieve high efficiency. A user selectable FPWM option is provided to achieve low output voltage ripple, tight

output voltage regulation, and constant switching frequency. The device is internally compensated, which

reduces design time, and requires few external components. The LMR23630 is capable of synchronization to an

external clock within the range of 200 kHz to 2.2 MHz.

Additional features such as precision enable and internal soft-start provide a flexible and easy to use solution for

a wide range of applications. Protection features include thermal shutdown, VIN and VCC under-voltage lockout,

cycle-by-cycle current limit, and hiccup mode short-circuit protection.

The family requires very few external components and has a pin-out designed for simple, optimum PCB layout.