LMZ14201EXT_15 Datasheet, PDF (1/32 Pages) Texas Instruments – 1A SIMPLE SWITCHER Power Module With 42-V Maximum Input Voltage for Demanding Environments and Rugged Applications

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LMZ14201EXT
SNVS664H – JUNE 2010 – REVISED OCTOBER 2015
LMZ14201EXT 1-A SIMPLE SWITCHER^® Power Module With 42-V Maximum Input Voltage
for Demanding Environments and Rugged Applications
1 Features
•1 Junction Temperature Range –55°C to 125°C
• Integrated Shielded Inductor
• Simple PCB Layout
• Flexible Startup Sequencing Using External Soft-
Start and Precision Enable
• Protection Against Inrush Currents and Faults
such as Input UVLO and Output Short Circuit
• 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 With Family Devices:
– LMZ14203EXT/2EXT/1EXT
(42-V Maximum 3 A, 2 A, 1 A)
– 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
– 6-W Maximum Total Output Power
– Up to 1-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
– Low Radiated Emissions and High Radiated
Immunity
– Passes Vibration Standard MIL-STD-883
Method 2007.2 Condition A JESD22–B103B
Condition 1
– Passes Drop Standard MIL-STD-883 Method
2002.3 Condition B JESD22–B110 Condition B
2 Applications
• Point-of-load Conversions from 12-V and 24-V
Input Rail
• Time Critical Projects
• Space Constrained and High Thermal
Requirement Applications
• Negative Output Voltage Applications
(See AN-2027 SNVA425)
3 Description
The LMZ14201EXT SIMPLE SWITCHER^® power
module is an easy-to-use step-down DC-DC solution
capable of driving up to 1-A load with exceptional
power conversion efficiency, line and load regulation,
and output accuracy. The LMZ14201EXT is available
in an innovative package that enhances thermal
performance and the device allows for hand or
machine soldering.
The LMZ14201EXT can accept an input voltage rail
between 6 V and 42 V and can deliver an adjustable
and highly accurate output voltage as low as 0.8 V.
The LMZ14201EXT only requires three external
resistors and four external capacitors to complete the
power solution. The LMZ14201EXT 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 startup 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)
LMZ14201EXT
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
LMZ14201EXT
VIN
RON
Enable
CIN
CSS
CFF
RFBT
RFBB
VOUT @ 1A
COUT
Efficiency 12-V Input at 25°C
100
95
6.0
5.0
90
3.3
2.5
85
1.8
1.5
80
1.2
75
0.8
70
65
60
55
25°C
50
0
0.2
0.4
0.6
0.8
1
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.