55

60

65

70

75

80

85

90

95

100

0.001

0.01

0.1

1

10

Output Current (A)

8V

12V

24V

36V

C009

VIN

EN

BOOT

SW

FB

AGND

L1

VCC

PG

PGND

Product

Folder

Order

Now

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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. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

LMR33630

SNVSAN3 – AUGUST 2017

Step-Down Voltage Converter

1

1 Features

1

•

Input Voltage Range: 3.8 V to 36 V

•

Output DC Current Range: 0 A to 3 A

•

Output Voltage Range: 1 V to 24 V

•

Integrated Synchronous Rectification

•

Low Shutdown Quiescent Current of 6 µA

•

Low Operating Quiescent Current of 25 µA

•

Short Minimum On-time of 70 ns

•

High Efficiency at Light Loads

•

Peak Current Mode Controls

•

Switching Frequency = 400 kHz

•

Power-Good Flag for Sequencing, Fault

Reporting, and Output Voltage Monitoring

•

Precision Enable to Program System UVLO

•

Cycle-by-Cycle Current Limiting

•

Operating Junction Temperature –40°C to +125°C

2 Applications

•

Industrial Power Supplies

•

Factory and Building Automation Systems

•

General-Purpose Wide Input Voltage Regulation

3 Description

easy-to-use,

synchronous,

step-down

DC-DC

converter capable of driving up to 3 A of load current

from an input of up to 36 V. The LMR33630 provides

exceptional efficiency and output accuracy in a very

small solution size. Peak-current-mode control is

employed. Additional features such as a power-good

flag and precision enable provide both flexible and

easy-to-use solutions for a wide range of applications.

The LMR33630 automatically folds back frequency at

light load to improve efficiency. The family requires

few external components and has a pinout designed

for simple PCB layout. Protection features include

thermal shutdown, input undervoltage lockout, cycle-

by-cycle

current

limit,

and

hiccup

short-circuit

protection. The LMR33630 device is available in an

8-pin HSOIC package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LMR33630

HSOIC (8)

6.00 mm × 5.00 mm

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

the end of the data sheet.

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space

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Simplified Schematic

Efficiency vs Output Current