LMZ14203H_15 Datasheet, PDF (1/31 Pages) Texas Instruments – SIMPLE SWITCHER 6V to 42V, 3A High Output Voltage Power Module

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LMZ14203H
SNVS692G – JANUARY 2011 – REVISED OCTOBER 2015
LMZ14203H SIMPLE SWITCHER^® 6V to 42V, 3A High Output Voltage Power Module
1 Features
•1 Integrated Shielded Inductor
• Simple PCB Layout
• Flexible Start-Up Sequencing Using External Soft-
Start and Precision Enable
• Protection Against Inrush Currents
• Input UVLO and Output Short-Circuit Protection
• –40°C to 125°C Junction Temperature Range
• Single Exposed Pad and Standard Pinout for Easy
Mounting and Manufacturing
• Low Output Voltage Ripple
• Pin-to-Pin Compatible Family:
– LMZ14203H/2H/1H (42 V Maximum, 3-A, 2-A,
1-A)
– LMZ14203/2/1 (4 2V Maximum, 3-A, 2-A, 1-A)
– LMZ12003/2/1 (20 V Maximum, 3-A, 2-A, 1-A)
• Fully Enabled for WEBENCH^® Power Designer
• Electrical Specifications
– Up to 3-A Output Current
– Input Voltage Range 6 V to 42 V
– Output Voltage as Low as 5 V
– Efficiency up to 97%
• Performance Benefits
– High Efficiency Reduces System Heat
Generation
– Low Radiated EMI (EN 55022 Class B Tested)
– No Compensation Required
– Low Package Thermal Resistance
NOTE: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007
2 Applications
• Intermediate Bus Conversions to 12-V and 24-V
Rail
• Time-Critical Projects
• Space Constrained and High Thermal
Requirement Applications
• Negative Output Voltage Applications
3 Description
The LMZ14203H SIMPLE SWITCHER^® power
module is an easy-to-use step-down DC-DC solution
that can drive up to 3-A load with exceptional power
conversion efficiency, line and load regulation, and
output accuracy. The LMZ14203H is available in an
innovative package that enhances thermal
performance and allows for hand or machine
soldering.
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
LMZ14203H only requires three external resistors
and four external capacitors to complete the power
solution. The LMZ14203H is a reliable and robust
design with the following protection features: thermal
shutdown, input undervoltage lockout, output
overvoltage protection, short-circuit protection, output
current limit, and allows start-up into a prebiased
output. A single resistor adjusts the switching
frequency up to 1 MHz.
Device Information⁽¹⁾⁽²⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMZ14203H
TO-PMOD (7) 10.16 mm × 9.85 mm
(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
LMZ14203H
VIN
RON
Enable
CIN
CSS
CFF
RFBT
RFBB
VOUT
COUT
Efficiency V_OUT = 12 V, T_A = 25°C
100
95
90
85
80
VIN = 15V
75
VIN = 24V
VIN = 30V
VIN = 36V
VIN = 42V
70
0.0 0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT (A)
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.