0

2

4

6

8

40

50

60

70

80

90

100

OUTPUT CURRENT (A)

6Vin

8Vin

10Vin

12Vin

16Vin

20Vin

VIN

CIN

3 x 10 2F

RFBT

CFF 4.7 nF (OPT)

See Table

CSS

0.47 2F

(OPT)

RFBB

See Table

COUT

2 x 330 2F

LMZ22008

VOUT

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LMZ22008

SNVS712H – FEBRUARY 2010 – REVISED AUGUST 2015

Current Sharing

1 Features

2 Applications

1

•

Integrated Shielded Inductor

•

Point-of-load Conversions from 12-V Input Rail

•

Simple PCB Layout

•

Time-Critical Projects

•

Frequency Synchronization Input (350 kHz to 600

•

Space Constrained and High Thermal

kHz)

Requirement Applications

•

Current Sharing Capability

•

Negative Output Voltage Applications

See AN-2027 SNVA425

•

Flexible Start-up Sequencing Using External

Soft-Start, Tracking and Precision Enable

3 Description

•

Protection Against Inrush Currents and Faults

such as Input UVLO and Output Short Circuit

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

•

Junction Temperature Range –40°C to 125°C

of driving up to 8-A load. The LMZ22008 is available

•

Single Exposed Pad and Standard Pinout for Easy

in an innovative package that enhances thermal

Mounting and Manufacturing

performance

and

allows

for

hand

or

machine

soldering.

•

The LMZ22008 can accept an input voltage rail

•

Pin Compatible With LMZ22010/06,

between 6 V and 20 V and deliver an adjustable and

LMZ12010/08/06, LMZ23610/08/06, and

highly accurate output voltage as low as 0.8 V. The

LMZ13610/08/06

LMZ22008 only requires two external resistors and

•

Electrical Specifications

external capacitors to complete the power solution.

–

40-W Maximum Total Output Power

The LMZ22008 is a reliable and robust design with

–

Up to 8-A Output Current

the following protection features: thermal shutdown,

–

Input Voltage Range 6 V to 20 V

programmable input undervoltage lockout, output

overvoltage protection, short circuit protection, output

–

Output Voltage Range 0.8 V to 6 V

current limit, and allows start-up into a prebiased

–

Efficiency up to 92%

output.

•

Performance Benefits

The sync input allows synchronization over the 314-

–

High Efficiency Reduces System Heat

to 600-kHz switching frequency range and up to 6

Generation

modules can be connected in parallel for higher load

–

Low Radiated Emissions (EMI) Tested to

currents.

EN55022

Device Information(1)(2)

–

Only 7 External Components

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

Low Output Voltage Ripple

LMZ22008

NDY (11)

15.00 mm × 15.00 mm

–

No External Heat Sink Required

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

–

Simple Current Sharing for Higher Current

the end of the data sheet.

Applications

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

more details.

NOTE:

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

tested on Evaluation Board with EMI configuration.

Simplified Application Schematic

Efficiency 3.3-V Output at 25°C

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.