0.0001

0.001

0.01

0.1

1

10

50

60

70

80

90

100

D000

BOOT

SW

L

FB

VIN

PGND

EN/SYNC

VCC

AGND

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LMR23625

SNVSAH3B – DECEMBER 2015 – REVISED APRIL 2017

1

1 Features

1

•

4.5 V to 36 V Input Range

•

2.5 A Continuous Output Current

•

Integrated Synchronous Rectification

•

Current Mode Control

•

Minimum Switch-On Time: 60 ns

•

2.1 MHz Switching Frequency With PFM and

Forced PWM Mode Options

•

Frequency Synchronization to External Clock

•

Internal Compensation for Ease of Use

•

75 µA Quiescent Current at No Load

•

Soft-Start into a Pre-Biased 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 LMR23625

With the WEBENCH® Power Designer

2 Applications

•

Automotive Battery Regulation

•

Industrial Power Supplies

•

Telecom and Datacom Systems

•

General Purpose Wide Vin Regulation

3 Description

use 36 V, 2.5 A synchronous step down regulator.

With a wide input range from 4.5 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 cycle-

by-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. The device has option for fixed

frequency FPWM mode to achieve small output

voltage ripple at light load. An extended family is

available in 1 A (LMR23610) and 3 A (LMR23630)

load

current

options

in

pin-to-pin

compatible

packages which allows 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.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LMR23625C

HSOIC (8)

4.89 mm x 3.90 mm

LMR23625CF

(FPWM Option)

HSOIC (8)

4.89 mm x 3.90 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic

Efficiency vs Load