Datasheet
User's Guide
SLVU434–February 2011
TPS53127EVM-614
The TPS53127EVM-614 Dual Output BUCK presents an easy to use reference design for a common dual
output power supply using the TPS53127 controller in cost sensitive applications.
Contents
1 Introduction .................................................................................................................. 2
1.1 Description .......................................................................................................... 2
1.2 Application .......................................................................................................... 2
1.3 Features ............................................................................................................. 2
2 Electrical Performance Specifications .................................................................................... 3
3 TPS53127EVM-614 Schematic ........................................................................................... 4
4 Connector and Test Point Descriptions .................................................................................. 5
4.1 Enable Switches (SW1 and SW2) ............................................................................... 5
4.2 Switching Frequency Select Switch (SW3) ..................................................................... 5
4.3 Test Point Descriptions ............................................................................................ 5
5 Test Setup ................................................................................................................... 6
5.1 Equipment ........................................................................................................... 6
5.2 Equipment Setup ................................................................................................... 7
5.3 Start Up/Shut Down Procedure .................................................................................. 9
5.4 Output Ripple Voltage Measurement Procedure .............................................................. 9
5.5 Equipment Shutdown .............................................................................................. 9
6 TPS53127EVM-614 Test Data ............................................................................................ 9
6.1 Efficiency .......................................................................................................... 10
6.2 Line and Load Regulation ....................................................................................... 11
6.3 Output Voltage Ripple and Switching Node waveforms ..................................................... 12
6.4 Switch Node ....................................................................................................... 13
7 TPS53127EVM-614 EVM Assembly Drawings and Layout .......................................................... 14
8 Bill of Materials ............................................................................................................. 17
List of Figures
1 TPS53127EVM-614 Schematic ........................................................................................... 4
2 Tip and Barrel Measurement for Output Voltage Ripple............................................................... 6
3 TPS53127EVM-614 Recommended Test Setup ....................................................................... 8
4 Efficiency vs Load (V
IN
= 8 V–22 V, V
OUT1
= 1.05 V, I
OUT1
- 0 A–4A)................................................. 10
5 Efficiency vs Load (V
IN
= 8 V–22 V, V
OUT2
= 1.8 V, I
OUT2
- 0 A–4A) .................................................. 10
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
= 1.05 V, I
OUT2
= 0 A–4 A)......................................... 11
8 Output Voltage Ripple (V
IN
= 12 V, V
OUT1
= 1.05 V, I
OUT1
= 4 A)...................................................... 12
9 Output Voltage Ripple (V
IN
= 12 V, V
OUT2
= 1.8 V, I
OUT2
= 4 A) ....................................................... 12
10 Switching Waveform (V
IN
= 12 V, V
OUT1
= 1.05 V, I
OUT1
= 4 A) ....................................................... 13
11 Switching Waveform (V
IN
= 12 V, V
OUT2
= 1.8 V, I
OUT2
= 4 A) ......................................................... 13
12 Top Assembly.............................................................................................................. 14
13 Bottom Assembly .......................................................................................................... 14
14 Top Layer................................................................................................................... 15
15 Bottom Layer............................................................................................................... 15
1
SLVU434–February 2011 TPS53127EVM-614
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