0.0

0.5

1.0

1.5

2.0

2.5

3.0

70

75

80

85

90

95

100

OUTPUT CURRENT (A)

VIN = 15V

VIN = 24V

VIN = 30V

VIN = 36V

VIN = 42V

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LMZ14203H

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LMZ14203H

SNVS692G – JANUARY 2011 – REVISED OCTOBER 2015

1 Features

2 Applications

1

•

Integrated Shielded Inductor

•

Intermediate Bus Conversions to 12-V and 24-V

Rail

•

Simple PCB Layout

•

Time-Critical Projects

•

Flexible Start-Up Sequencing Using External Soft-

Start and Precision Enable

•

Space Constrained and High Thermal

Requirement Applications

•

Protection Against Inrush Currents

•

Negative Output Voltage Applications

•

Input UVLO and Output Short-Circuit Protection

•

–40°C to 125°C Junction Temperature Range

3 Description

•

Single Exposed Pad and Standard Pinout for Easy

The

LMZ14203H

SIMPLE

power

Mounting and Manufacturing

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

•

Low Output Voltage Ripple

that can drive up to 3-A load with exceptional power

conversion efficiency, line and load regulation, and

•

Pin-to-Pin Compatible Family:

output accuracy. The LMZ14203H is available in an

–

LMZ14203H/2H/1H (42 V Maximum, 3-A, 2-A,

innovative

package

that

enhances

thermal

1-A)

performance

and

allows

for

hand

or

machine

–

LMZ14203/2/1 (4 2V Maximum, 3-A, 2-A, 1-A)

soldering.

–

LMZ12003/2/1 (20 V Maximum, 3-A, 2-A, 1-A)

The LMZ14203H can accept an input voltage rail

•

between 6 V and 42 V and deliver an adjustable and

highly accurate output voltage as low as 5 V. The

•

Electrical Specifications

LMZ14203H only requires three external resistors

–

Up to 3-A Output Current

and four external capacitors to complete the power

–

Input Voltage Range 6 V to 42 V

solution. The LMZ14203H is a reliable and robust

design with the following protection features: thermal

–

Output Voltage as Low as 5 V

shutdown,

input

undervoltage

lockout,

output

–

Efficiency up to 97%

overvoltage protection, short-circuit protection, output

•

Performance Benefits

current limit, and allows start-up into a prebiased

–

High Efficiency Reduces System Heat

output.

A

single

resistor

adjusts

the

switching

frequency up to 1 MHz.

Generation

–

Low Radiated EMI (EN 55022 Class B Tested)

Device Information(1)(2)

–

No Compensation Required

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

Low Package Thermal Resistance

LMZ14203H

TO-PMOD (7)

10.16 mm × 9.85 mm

NOTE:

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

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

the end of the data sheet.

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

more details.

Simplified Application Schematic

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.