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User's Guide
SLVU174B – August 2006 – Revised APRIL 2009
Using the TPS40200
The TPS40200EVM-002 evaluation module (EVM) uses the TPS40200 non-synchronous buck converter
to provide a resistor-selected, 3.3-V output that delivers up to 2.5 A from a 24-V input bus. The EVM
operates from a single supply and uses a single P-channel power FET and Schottky diode to produce a
low-cost buck converter. The part operates at a 200-kHz clock frequency as determined by an external
resistor and capacitor.
Contents
1 Description .................................................................................................................... 2
2 TPS40200EVM-002 Electrical and Performance Specifications....................................................... 2
3 Schematic ..................................................................................................................... 3
4 Test Setup .................................................................................................................... 4
5 TPS40200EVM Typical Performance Data and Characteristic Curves ............................................... 7
6 EVM Assembly Drawings and Layout ..................................................................................... 7
7 List of Materials ............................................................................................................. 12
List of Figures
1 TPS40200EVM-002 Schematic ............................................................................................ 3
2 TPS40200EVM-002 Recommended Test Setup ........................................................................ 6
3 Output Ripple Measurement - Tip and Barrel Using TP14 and TP15 ................................................ 6
4 TPS40200EVM-002 Efficiency ............................................................................................. 7
5 Typical TPS40200EVM-002 Line and Load Regulation – V
OUT
= 3.312 V ........................................... 7
6 TPS40200EVM-002 Component Placement (Viewed from Top) ...................................................... 8
7 TPS40200EVM-002 Silkscreen (Viewed from Top) ..................................................................... 9
8 TPS40200EVM-002 Top View ............................................................................................ 10
9 TPS40200EVM-002 Bottom View ........................................................................................ 11
List of Tables
1 Adjusting V
OUT
With R9 Rounded to Standard 1% Resistor Values .................................................. 4
2 TPS40200EVM-002 Bill of Materials ..................................................................................... 12
SLVU174B – August 2006 – Revised APRIL 2009 Using the TPS40200 1
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