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74408943220 Datasheet(PDF) 1 Page - Texas Instruments

No. de pieza 74408943220
Descripción Electrónicos  TPS54120EVM, Low Noise 1A Power Supply Evaluation Module
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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User
's Guide
SLVU641
– January 2012
TPS54120EVM, Low Noise 1A Power Supply Evaluation
Module
This User
’s Guide describes operational use of the TPS54120 Evaluation Module (PWR103) as a
reference design for engineering demonstration and evaluation of the TPS54120, low noise 1A power
supply. Included in this user
’s guide are setup and operation instructions, a schematic diagram, layout
description, a bill of materials, and test results.
Contents
1
Background
.................................................................................................................. 2
2
Setup
......................................................................................................................... 2
2.1
Input and Output Connections and Jumper Descriptions
..................................................... 2
2.2
Modifications
........................................................................................................ 3
2.3
Equipment Interconnect
........................................................................................... 4
3
Operation
..................................................................................................................... 4
4
Test Results
................................................................................................................. 4
4.1
Output Voltage Ripple
............................................................................................. 5
4.2
Output Noise
........................................................................................................ 5
4.3
Output Turn On
..................................................................................................... 6
4.4
Load Transient
..................................................................................................... 7
4.5
Efficiency
............................................................................................................ 8
4.6
Thermal Characteristic
............................................................................................ 8
5
Board Layout
................................................................................................................ 9
5.1
Layout Description
................................................................................................. 9
6
Schematic
.................................................................................................................. 12
7
Bill of Materials
............................................................................................................. 13
List of Figures
1
Output Voltage of Both the SW and LDO with 400mA Load
.......................................................... 5
2
Output Spectrum Noise Density vs. Frequency
........................................................................ 5
3
Switcher Converter Output Voltage Turn-on, SW Enable
............................................................ 6
4
LDO Output Voltage Turn-on, LDO Enable
............................................................................. 6
5
LDO Output Voltage Turn-on, SW Enable
............................................................................... 7
6
TPS54120 Transient Response
........................................................................................... 7
7
TPS54120 Efficiency
....................................................................................................... 8
8
TPS54120 Thermal Image
................................................................................................. 9
9
Top Side Silkscreen and Routing
....................................................................................... 10
10
Second Layer (Internal) Routing
......................................................................................... 11
11
Third Layer (Internal) Routing
............................................................................................ 11
12
Bottom Layer Silkscreen and Routing
.................................................................................. 12
13
Schematic
.................................................................................................................. 12
List of Tables
1
EVM Specifications
......................................................................................................... 2
2
Sample 1% Resistor Values for Common SW Output Voltages
...................................................... 3
1
SLVU641
– January 2012
TPS54120EVM, Low Noise 1A Power Supply Evaluation Module
Submit Documentation Feedback
Copyright
© 2012, Texas Instruments Incorporated


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