Texas Instruments TPS53127EVM-614, User Manual, Page: 1 / 19

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
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2
1.1 Description
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2
1.2 Application
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2
1.3 Features
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2
2 Electrical Performance Specifications
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3
3 TPS53127EVM-614 Schematic
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4
4 Connector and Test Point Descriptions
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5
4.1 Enable Switches (SW1 and SW2)
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5
4.2 Switching Frequency Select Switch (SW3)
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5
4.3 Test Point Descriptions
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5
5 Test Setup
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6
5.1 Equipment
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6
5.2 Equipment Setup
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7
5.3 Start Up/Shut Down Procedure
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9
5.4 Output Ripple Voltage Measurement Procedure
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9
5.5 Equipment Shutdown
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9
6 TPS53127EVM-614 Test Data
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9
6.1 Efficiency
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10
6.2 Line and Load Regulation
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11
6.3 Output Voltage Ripple and Switching Node waveforms
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12
6.4 Switch Node
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13
7 TPS53127EVM-614 EVM Assembly Drawings and Layout
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14
8 Bill of Materials
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17
List of Figures
1 TPS53127EVM-614 Schematic
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4
2 Tip and Barrel Measurement for Output Voltage Ripple
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6
3 TPS53127EVM-614 Recommended Test Setup
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8
4 Efficiency vs Load (V
IN
= 8 V–22 V, V
OUT1
= 1.05 V, I
OUT1
- 0 A–4A)
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10
5 Efficiency vs Load (V
IN
= 8 V–22 V, V
OUT2
= 1.8 V, I
OUT2
- 0 A–4A)
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10
6 Output Voltage vs Load (V
IN
= 8 V–22 V, V
OUT1
= 1.05 V, I
OUT1
= 0 A–4 A)
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11
7 Output Voltage vs Load (V
IN
= 8 V–22 V, V
OUT2
= 1.05 V, I
OUT2
= 0 A–4 A)
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11
8 Output Voltage Ripple (V
IN
= 12 V, V
OUT1
= 1.05 V, I
OUT1
= 4 A)
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12
9 Output Voltage Ripple (V
IN
= 12 V, V
OUT2
= 1.8 V, I
OUT2
= 4 A)
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12
10 Switching Waveform (V
IN
= 12 V, V
OUT1
= 1.05 V, I
OUT1
= 4 A)
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13
11 Switching Waveform (V
IN
= 12 V, V
OUT2
= 1.8 V, I
OUT2
= 4 A)
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13
12 Top Assembly
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14
13 Bottom Assembly
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14
14 Top Layer
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15
15 Bottom Layer
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15
1 SLVU434 – February 2011 TPS53127EVM-614
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