Datasheet

User's Guide
SLVU213 – May 2007
Using the TPS40180EVM, A 20A Stackable Single Phase
Synchronous Buck Converter
Contents
1 Introduction .......................................................................................... 2
2 Description ........................................................................................... 2
3 TPS40180EVM Electrical Performance Specifications ........................................ 3
4 Schematic ........................................................................................... 4
5 Test Set Up .......................................................................................... 5
6 TPS40180EVM Typical Performance Data and Characteristic Curves .................... 10
7 EVM Assembly Drawings and Layout .......................................................... 12
8 List of Materials .................................................................................... 18
List of Figures
1 TPS40180EVM Power Stage/Control Schematic For Reference Only, See Table 6:
Bill of Materials for Specific Values .............................................................. 4
2 TPS40180EVM Configuration Schematic ....................................................... 5
3 TPS40180EVM Recommended Test Set-Up ................................................... 7
4 Output Ripple Measurement ...................................................................... 7
5 Master/Slave Configuration ....................................................................... 9
6 TPS40180EVM Efficiency ........................................................................ 11
7 TPS40180EVM V
OUT
= 1.5V Load Regulation ................................................ 11
8 Loop Gain When V
IN
= 12V and I
OUT
= 20A, Cross Over Frequency = 23kHz, Phase
Margin = 70 ° ....................................................................................... 12
9 0–8A Load Step, Ch1: I
OUT
; Ch4: V
OUT
........................................................ 12
10 TPS40180EVM Component Placement (Viewed from Top) ................................ 13
11 TPS40180EVM Top Copper (Viewed from Top) .............................................. 14
12 TPS40180EVM Layer 2 Copper (X-Ray View from Top) .................................... 15
13 TPS40180EVM Layer 3 Copper (X-Ray View from Top) .................................... 16
14 TPS40180EVM Bottom Copper (X-Ray View from Top) ..................................... 17
List of Tables
1 TPS40180EVM Electrical and Performance Specifications ................................... 3
2 Master Clock Scheme Selection .................................................................. 8
3 Slave Phase Programming With 8 Phase CLKIO .............................................. 9
4 Slave Phase Programming With 6 Phase CLKIO .............................................. 9
5 List of Test Points ................................................................................. 10
6 TPS40180EVM Bill of Materials ................................................................. 18
SLVU213 – May 2007 Using the TPS40180EVM, A 20A Stackable Single Phase Synchronous Buck Converter 1
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