0

1

2

3

4

5

40

50

60

70

80

90

100

OUTPUT CURRENT (A)

9 VIn

12 Vin

20 Vin

22 2F

Enable

See Table

0.47 2F

See Table

Co

220 2F

LMZ22005

Product

Folder

Sample &

Buy

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Documents

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LMZ22005

SNVS686J – MARCH 2011 – REVISED AUGUST 2015

1 Features

2 Applications

1

•

Integrated Shielded Inductor

•

Point-of-load Conversions from 12V Input Rail

•

Simple PCB Layout

•

Time-Critical Projects

•

Frequency Synchronization Input (650 kHz to

•

Space Constrained/High Thermal Requirement

Applications

950 kHz)

•

Negative Output Voltage Applications

•

Flexible Start-up Sequencing Using External

(see AN-2027 SNVA425)

Soft-Start, Tracking and Precision Enable

•

Protection Against Inrush Currents and Faults

3 Description

Such as Input UVLO and Output Short Circuit

•

Junction Temperature Range –40°C to 125°C

is an easy-to-use step-down DC-DC solution capable

•

Single Exposed Pad for Easy Mounting and

of driving up to 5-A load. The LMZ22005 is available

Manufacturing

in an innovative package that enhances thermal

performance

and

allows

for

hand

or

machine

•

Fast Transient Response for Powering FPGAs

soldering.

and ASICs

The LMZ22005 can accept an input voltage rail

•

between 6 V and 20 V and can deliver an adjustable

•

Pin Compatible With

and highly accurate output voltage as low as 0.8 V.

LMZ23605/LMZ23603/LMZ22003

The LMZ22005 only requires two external resistors

•

Electrical Specifications

and three external capacitors to complete the power

–

30-W Maximum Total Output Power

solution. The LMZ22005 is a reliable and robust

design with the following protection features: thermal

–

Up to 5-A Output Current

shutdown,

input

undervoltage

lockout,

output

–

Input Voltage Range 6 V to 20 V

overvoltage protection, short circuit protection, output

–

Output Voltage Range 0.8 V to 6 V

current limit, and the device allows start-up into a

prebiased

output.

The

sync

input

allows

–

Efficiency up to 92%

synchronization over the 650- to 950-kHz switching

•

Performance Benefits

frequency range.

–

High Efficiency Reduces System Heat

Generation

Device Information(1)(2)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

LMZ22005

NDW (7)

10.16 mm × 9.85 mm

–

Low Component Count, Only 5 External

Components

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

the end of the data sheet.

–

Low Output Voltage Ripple

(2) Peak reflow temperature equals 245°C. See SNAA214 for

–

Uses PCB as Heat Sink, No Airflow Required

more details.

(1)

EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007.

See AN-2125 SNVA473 and layout for information on device

under test. Vin = 12 V, Vo = 3.3 V, Io = 5 A

Simplified Application Schematic

Efficiency 5-V Output at 25°C Ambient

1

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.