Texas Instruments TPS51225 Evaluation Module TPS51225EVM-133 TPS51225EVM-133 Scheda Tecnica
Codici prodotto
TPS51225EVM-133
User's Guide
SLVU735 – June 2012
Dual Synchronous Step-Down Fixed Output Controller
with 5-V and 3.3-V LDOs
The TPS51225EVM-133 evaluation module (EVM) uses the TPS51225. The TPS51225 is a D-CAP™
mode, dual synchronous step down controller with 5- and 3.3-V low-dropout regulators (LDO). The EVM
provides fixed 5- and 3.3-V outputs at up to 10 A each, from a 12-V input bus.
mode, dual synchronous step down controller with 5- and 3.3-V low-dropout regulators (LDO). The EVM
provides fixed 5- and 3.3-V outputs at up to 10 A each, from a 12-V input bus.
Contents
1
Description
...................................................................................................................
1.1
Typical Applications
................................................................................................
1.2
Features
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2
Electrical Performance Specifications
....................................................................................
3
Schematic
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4
Test Setup
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4.1
Test Equipment
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4.2
Recommended Test Setup
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5
Configurations
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6
Test Procedure
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6.1
Line/Load Regulation and Efficiency Measurement Procedure
..............................................
6.2
List of Test Points
..................................................................................................
6.3
Equipment Shutdown
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7
Performance Data and Typical Characteristic Curves
.................................................................
7.1
5-V Efficiency
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7.2
5-V Load Regulation
...............................................................................................
7.3
3.3-V Efficiency
...................................................................................................
7.4
3.3-V Load Regulation
...........................................................................................
7.5
Enable Turn on/Turn off
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7.6
Output Ripple
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7.7
Switching Node
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7.8
5-V Output Transient with Auto-skip Mode
....................................................................
7.9
3.3-V Output Transient with Auto-skip Mode
.................................................................
7.10
Output Prebias Turn on
..........................................................................................
7.11
Thermal Image
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8
EVM Assembly Drawing and PCB Layout
.............................................................................
9
Bill of Materials
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List of Figures
1
TPS51225EVM-133 Schematic
...........................................................................................
2
Tip and Barrel Measurement for Vout Ripple
...........................................................................
3
TPS51225EVM-133 Recommended Test Set Up
......................................................................
4
5-V Efficiency
................................................................................................................
5
5-V Load Regulation
........................................................................................................
6
3.3-V Efficiency
............................................................................................................
7
3.3-V Load Regulation
....................................................................................................
8
EN1 and EN2 Turn on
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9
EN1 and EN2 Turn off
....................................................................................................
1
SLVU735 – June 2012
Dual Synchronous Step-Down Fixed Output Controller with 5-V and 3.3-V
LDOs
Copyright © 2012, Texas Instruments Incorporated