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User's Guide
SLVU192 – February 2007
Using the TPS40077EVM-001 12-V Input, 1.8-V Output,
10-A Synchronous Buck Converter
The TPS40077EVM-001 evaluation module (EVM) is a synchronous buck converter
providing a fixed 1.8-V output at up to 10 A from a 12-V input bus. The EVM is
designed to start up from a single supply; no additional bias voltage is required for
start-up. The TPS40077 Reduced Pin Count Synchronous Buck Controller used in the
EVM employs predictive gate drive. This feature provides improved efficiency by
eliminating shoot-through switching current,and minimizing the reverse-conduction time
of the synchronous rectifier FET.
Contents
1 Introduction .......................................................................................... 2
2 TPS40077EVM-001 Electrical Performance Specifications ................................... 3
3 Schematic ........................................................................................... 4
4 TPS40077EVM Typical Performance Data and Characteristic Curves ..................... 9
5 EVM Assembly Drawings and Layout .......................................................... 10
6 List of Materials .................................................................................... 12
List of Figures
1 TPS40077EVM-001 Schematic ................................................................... 4
2 Output Ripple Measurement – Tip and Barrel Using TP9 and TP10 ........................ 6
3 TPS40077EVM-001 Recommended Test Set-Up .............................................. 7
4 Control Loop Measurement Setup ............................................................... 8
5 TPS40077EVM-001 Efficiency .................................................................... 9
6 TPS40077EVM-001 Line and Load Regulation ............................................... 10
7 TPS40077EVM-001 Component Placement (Viewed from Top) .......................... 10
8 TPS40077EVM-001 Silkscreen (Viewed from Top) ......................................... 11
9 TPS40077EVM-001 Top Copper (Viewed from Top) ........................................ 11
10 TPS40077EVM-001 Bottom Copper (X-Ray View from Top) ............................... 12
List of Tables
1 TPS40077EVM-001 Electrical and Performance Specifications ............................. 3
2 Adjusting V
OUT
With R3 ............................................................................ 5
3 Bill of Materials .................................................................................... 12
SLVU192 – February 2007 Using the TPS40077EVM-001 12-V Input, 1.8-V Output, 10-A Synchronous Buck Converter 1
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