EA

REF

EN/SYNC

SW

BOOT

VCC

Internal

SS

OV/UV

Detector

Oscillator

Precision

Enable

LDO

PFM

Detector

Slope

Comp

PWM CONTROL LOGIC

UVLO

TSD

Freq

Foldback

Zero

Cross

HICCUP

Detector

VIN

Rc

Cc

PGND

FB

LS I Sense

HS I Sense

FB

VCC

Enable

SYNC

Detector

SYNC Signal

SYNC Signal

AGND

10

LMR23610-Q1

SNVSAR4 – DECEMBER 2016

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Copyright © 2016, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

operating from 4 V to 36 V supply voltage. It is capable of delivering up to 1 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 LMR23610-Q1 employs fixed frequency peak current mode control. The device enters PFM mode at light

load to achieve high efficiency. The device is internally compensated, which reduces design time, and requires

few external components. The LMR23610-Q1 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.

7.2 Functional Block Diagram