Texas Instruments Evaluation Module for TPS54120 1A Power Supply w/ Integrated DC-DC Converter & Low-Dropout Regulator T TPS54120EVM-103 数据表
产品代码
TPS54120EVM-103
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
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
Setup
.........................................................................................................................
2.1
Input and Output Connections and Jumper Descriptions
.....................................................
2.2
Modifications
........................................................................................................
2.3
Equipment Interconnect
...........................................................................................
3
Operation
.....................................................................................................................
4
Test Results
.................................................................................................................
4.1
Output Voltage Ripple
.............................................................................................
4.2
Output Noise
........................................................................................................
4.3
Output Turn On
.....................................................................................................
4.4
Load Transient
.....................................................................................................
4.5
Efficiency
............................................................................................................
4.6
Thermal Characteristic
............................................................................................
5
Board Layout
................................................................................................................
5.1
Layout Description
.................................................................................................
6
Schematic
..................................................................................................................
7
Bill of Materials
.............................................................................................................
List of Figures
1
Output Voltage of Both the SW and LDO with 400mA Load
..........................................................
2
Output Spectrum Noise Density vs. Frequency
........................................................................
3
Switcher Converter Output Voltage Turn-on, SW Enable
............................................................
4
LDO Output Voltage Turn-on, LDO Enable
.............................................................................
5
LDO Output Voltage Turn-on, SW Enable
...............................................................................
6
TPS54120 Transient Response
...........................................................................................
7
TPS54120 Efficiency
.......................................................................................................
8
TPS54120 Thermal Image
.................................................................................................
9
Top Side Silkscreen and Routing
.......................................................................................
10
Second Layer (Internal) Routing
.........................................................................................
11
Third Layer (Internal) Routing
............................................................................................
12
Bottom Layer Silkscreen and Routing
..................................................................................
13
Schematic
..................................................................................................................
List of Tables
1
EVM Specifications
.........................................................................................................
2
Sample 1% Resistor Values for Common SW Output Voltages
......................................................
1
SLVU641
–
January 2012
TPS54120EVM, Low Noise 1A Power Supply Evaluation Module
Copyright
©
2012, Texas Instruments Incorporated