LMZ31520_15 Datasheet, PDF (1/31 Pages) Texas Instruments – 20A SIMPLE SWITCHER® Power Module with 3.0V-14.5V Input in QFN Package

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LMZ14202
SNVS648J – JANUARY 2010 – REVISED OCTOBER 2015
LMZ14202 SIMPLE SWITCHER^® 6V to 42V, 2A Power Module in Leaded SMT-TO Package
1 Features
•1 Integrated Shielded Inductor
• Simple PCB Layout
• Flexible Start-Up Sequencing Using External Soft-
Start and Precision Enable
• Protection Against Inrush Currents and Faults
Such as Input UVLO and Output Short Circuit
• Junction Temperature Range: –40°C to 125°C
• Single Exposed Pad and Standard Pinout for Easy
Mounting and Manufacturing
• Fast Transient Response for Powering FPGAs
and ASICs
• Low Output Voltage Ripple
• Pin-to-Pin Compatible Family:
– LMZ14203/2/1 (42 V 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
– 12-W Maximum Total Output Power
– Up to 2-A Output Current
– Input Voltage Range: 6 V to 42 V
– Output Voltage Range: 0.8 V to 6 V
– Efficiency up to 90%
• Performance Benefits
– Operates at High Ambient Temperature With
No Thermal Derating
– High Efficiency Reduces System Heat
Generation
– Low Radiated Emissions (EMI) Tested With
EN55022 Class B Standard
– Low External Component Count
2 Applications
• Point of Load Conversions from 12-V and 24-V
Input Rail
• Time-Critical Projects
• Space Constrained and High Thermal
Requirement Applications Easy-To-Use, 7-Pin
Package
PFM 7-Pin Package
• Negative Output Voltage Applications
(See AN-2027) SNVA425
3 Description
The LMZ14202, SIMPLE SWITCHER^® power module
is an easy-to-use step-down DC-DC that can drive up
to 2-A load with exceptional power conversion
efficiency, line and load regulation, and output
accuracy. The LMZ14202 is available in an innovative
package that enhances thermal performance and
allows for hand or machine soldering.
The LMZ14202 can accept an input voltage rail
between 6 V and 42 V and deliver an adjustable and
highly accurate output voltage as low as 0.8 V. The
LMZ14202 only requires three external resistors and
four external capacitors to complete the power
solution. The LMZ14202 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)
LMZ14202
TO-PMOD (7)
10.16 mm × 9.85 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) Peak reflow temperature equals 245°C. See SNAA214 for
more details.
Simplified Application Schematic
LMZ14202
VIN
RON
Enable
CIN
CSS
CFF
RFBT
RFBB
VOUT
COUT
1
Efficiency 12-V Input at 25°C
100
95
6.0
90
5.0
3.3
85
2.5
80
1.8
1.5
75
1.2
70
65
60
55
25°C
50
0
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
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.