LMZ12003EXT_15 Datasheet, PDF (1/29 Pages) Texas Instruments – 3A SIMPLE SWITCHER Power Module With 20-V Maximum Input Voltage for Demanding Environments and Rugged Applications

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LMZ12003EXT
SNVS663H – JUNE 2010 – REVISED AUGUST 2015
LMZ12003EXT 3-A SIMPLE SWITCHER^® Power Module With 20-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 Start-up Sequencing Using External Soft-
Start Capacitor 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 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 WEBENCH^® Power Designer Enabled
• Electrical Specifications
– 18-W Maximum Total Power Output
– Up to 3-A Output Current
– Input Voltage Range 4.5 V to 20 V
– Output Voltage Range 0.8 V to 6 V
– Efficiency up to 92%
• 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 5-V and 12-V
Input Rail
• Time-Critical Projects
• Space Constrained High Thermal Requirement
Applications
• Negative Output Voltage Applications (See AN-
2027 SNVA425)
3 Description
The LMZ12003EXT SIMPLE SWITCHER^® power
module is an easy-to-use step-down DC-DC solution
capable of driving up to 3-A load with exceptional
power conversion efficiency, line and load regulation,
and output accuracy. The LMZ12003EXT is available
in an innovative package that enhances thermal
performance and allows for hand or machine
soldering.
The LMZ12003EXT can accept an input voltage rail
between 4.5 V and 20 V and can deliver an
adjustable and highly accurate output voltage as low
as 0.8 V. The LMZ12003EXT only requires three
external resistors and four external capacitors to
complete the power solution. The LMZ12003EXT 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 the
device 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)
LMZ12003EXT
NDW (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
LMZ12003EXT
VIN
RON
Enable
CIN
CSS
CFF
RFBT
RFBB
VOUT @ 3A
COUT
1
Efficiency 12-V Input at 25°C
100
95
90
5.0
85
3.3
2.5
80
1.8
75
1.5
1.2
70
65
0.8
60
55
25°C
50
0 0.5 1 1.5 2 2.5 3
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.