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User's Guide
SLUU379–November 2009
Using the TPS51727EVM, a Dual-Phase, Eco-mode™
Step-Down Power Management IC for 40-A+ Application
The TPS51727EVM evaluation module (EVM) is a dual-phase, ECO-mode™synchronous buck converter
providing a fixed 1.5-V or 4-bit VID with 0.875-V to 1.25-V output range at up to 40 A from a 12-V input
bus. The EVM uses the TPS51727 synchronous buck controller with selectable 200/300/400/500 kHz.
Contents
1 Description ................................................................................................................... 2
2 Electrical Performance Specifications .................................................................................... 3
3 Schematic .................................................................................................................... 4
4 Test Setup ................................................................................................................... 6
5 Configuration ................................................................................................................ 7
6 Test Procedure .............................................................................................................. 9
7 Performance Data and Typical Characteristic Curves ................................................................ 10
8 EVM Assembly Drawing and PCB Layout ............................................................................. 15
9 Bill of Materials ............................................................................................................. 19
List of Figures
1 TPS51727EVM Schematic, Sheet 1...................................................................................... 5
2 TPS51727EVM Schematic, Sheet 2...................................................................................... 5
3 Tip and Barrel Measurement for Vout Ripple ........................................................................... 6
4 TPS51727EVM Recommended Test Setup............................................................................. 7
5 TPS51727EVM Efficiency................................................................................................ 10
6 TPS51727 Load Regulation.............................................................................................. 11
7 TPS51727 Line Regulation............................................................................................... 11
8 TPS51727EVM PMON Curve ........................................................................................... 12
9 TPS51727EVM Phase 1 and Phase 2 Current Share................................................................ 12
10 TPS51727EVM Output Ripple........................................................................................... 13
11 Switching Node ............................................................................................................ 13
12 Output Transient........................................................................................................... 14
13 Enable Turnon Waveform ................................................................................................ 14
14 Enable Turnoff Waveform ................................................................................................ 15
15 TPS51727EVM Top Layer Assembly Drawing, Top View ........................................................... 16
16 TPS51727EVM Bottom Assembly Drawing, Bottom View ........................................................... 16
17 TPS51727EVM Top Copper, Top View ................................................................................ 17
18 TPS51727EVM Internal Layer 2, Top View............................................................................ 17
19 TPS51727EVM Internal Layer 3, Top View............................................................................ 18
20 TPS51727EVM Internal Layer 4, Top View............................................................................ 18
21 TPS51727EVM Internal Layer 5, Top View............................................................................ 19
22 TPS51727EVM Bottom Copper, Top View ............................................................................ 19
List of Tables
1 TPS51727EVM Electrical Performance Specifications ................................................................ 3
1
SLUU379–November 2009 Using the TPS51727EVM, a Dual-Phase, Eco-mode™ Step-Down Power
Management IC for 40-A+ Application
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