Datasheet
User's Guide
SLVU435–February 2011
TPS53126EVM-600
The TPS53126EVM-600 Evaluation Module presents an easy-to-use reference design for a common,
dual-output power supply using the TPS53126 controller in cost-sensitive applications.
Contents
1 Introduction .................................................................................................................. 3
1.1 Description .......................................................................................................... 3
1.2 Applications ......................................................................................................... 3
1.3 Features ............................................................................................................. 3
2 Electrical Performance Specifications .................................................................................... 4
3 Schematic .................................................................................................................... 5
4 Connector and Test Point Descriptions .................................................................................. 6
4.1 Enable Switches – SW1 and SW2 ............................................................................... 6
4.2 Switching Frequency Select Switch – SW3 .................................................................... 6
4.3 Test Point Descriptions ............................................................................................ 6
5 Test Setup ................................................................................................................... 7
5.1 Equipment ........................................................................................................... 7
5.2 Recommended Setup ............................................................................................. 8
6 Test Procedure .............................................................................................................. 9
6.1 Start-up Procedure ................................................................................................. 9
6.2 Line/Load Regulation and Efficiency Measurement Procedure ............................................ 10
6.3 Output Ripple Voltage Measurement Procedure ............................................................. 10
6.4 Shutdown Procedure ............................................................................................. 10
7 Performance Data and Typical Characteristic Curves ................................................................ 10
7.1 Efficiency .......................................................................................................... 10
7.2 Line and Load Regulation ....................................................................................... 11
7.3 Output Voltage Ripple ........................................................................................... 12
7.4 Switch Node Waveforms ........................................................................................ 13
8 EVM Assembly Drawings and Layout .................................................................................. 14
9 Bill of Materials ............................................................................................................. 18
List of Figures
1 TPS53126EVM-600 Schematic ........................................................................................... 5
2 Tip and Barrel Measurement for Output Voltage Ripple............................................................... 7
3 TPS53126EVM-600 Recommended Test Setup ....................................................................... 9
4 Efficiency vs Load (V
IN
= 8 V–22 V, V
OUT1
= 1.05 V, I
OUT1
= 0 A–4 A) ............................................... 10
5 Efficiency vs Load (V
IN
= 8 V–22 V, V
OUT2
= 1.8 V, I
OUT2
= 0 A–4 A)................................................. 11
6 Output Voltage vs Load (V
IN
= 8 V–22 V, V
OUT1
= 1.05 V, I
OUT1
= 0 A–4 A)......................................... 11
7 Output Voltage vs Load (V
IN
= 8 V–22 V, V
OUT2
= 1.8 V, I
OUT2
= 0 A–4 A) .......................................... 12
8 Output Voltage Ripple (V
IN
= 12 V, V
OUT1
= 1.05 V, I
OUT1
= 4 A, F
SW
= 350 kHz) ................................... 12
9 Output Voltage Ripple (V
IN
= 12 V, V
OUT2
= 1.8 V, I
OUT2
= 4 A, F
SW
= 350 kHz) .................................... 13
10 Switching Waveform (V
IN
= 12 V, V
OUT1
= 1.05 V, I
OUT1
= 4 A, F
SW
= 350 kHz)..................................... 13
11 Switching Waveform (V
IN
= 12 V, V
OUT2
= 1.08 V, I
OUT2
= 4 A, F
SW
= 350 kHz)..................................... 14
12 Top Assembly.............................................................................................................. 14
13 Bottom Assembly .......................................................................................................... 15
1
SLVU435–February 2011 TPS53126EVM-600
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