Texas Instruments TPS6227xEVM-306, User Manual

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1 Introduction
User's Guide
SLVU234 – February 2008
TPS6227xEVM-306
The TPS6227xEVM-306 user’s guide describes the characteristics, operation, and use of the
TPS6227xEVM-306 evaluation module (EVM). This EVM demonstrates the Texas Instruments TPS62270,
a 2.25 MHz, synchronous step-down converter that provides up to 400 mA of output current. See the
TPS62270 data sheet (
SLVS799 ), 2.25 MHz 400-mA Step Down Converter With Selectable VOUT for
device specifications and recommended operating conditions. This user’s guide includes setup
instructions, a schematic diagram, a bill of materials (BOM), and PCB layout drawings for the evaluation
module.
Contents
1 Introduction
...................................................................................................................
1
2 Setup
..........................................................................................................................
2
3 Operation
.....................................................................................................................
2
4 Test Results
..................................................................................................................
3
5 Board Layout
.................................................................................................................
6
6 Schematic and Bill of Materials
............................................................................................
8
6.1 Schematic
............................................................................................................
8
6.2 Bill of Materials
......................................................................................................
9
List of Figures
1 Start up from Enable, V
I
= 3.6 V, VOUT = 1.15 V, R
Load
= 2.5
Ω
......................................................
3
2 Load Transient, 115 mA to 300 mA step, V
I
= 3.6 V, VOUT = 1.15 V
................................................
3
3 Load Transient, 300 mA to 115 mA step, V
I
= 3.6 V, VOUT = 1.15 V
................................................
4
4 Start up from Enable, V
I
= 3.6 V, VOUT = 0.9 V, R
Load
= 2.5
Ω .......................................................
4
5 Load Transient, 90 mA to 272 mA step, V
I
= 3.6 V, VOUT = 0.9 V
...................................................
5
6 Load Transient, 272 mA to 90 mA step, V
I
= 3.6 V, VOUT = 0.9 V
...................................................
5
7 VSEL Output Voltage Response, V
I
= 3.6 V, R
Load
= 3.3
Ω ............................................................
6
8 Assembly Layer
..............................................................................................................
7
9 Top Layer Routing
...........................................................................................................
7
10 Bottom Layer Routing
.......................................................................................................
8
11 TPS6227XEVM-306 Schematic
............................................................................................
8
List of Tables
1 TPS6227xEVM-306 Jumpers and Connections
.........................................................................
2
2 TPS6227XEVM-306 Bill of Materials
......................................................................................
9
The TPS6227xEVM-306 EVM helps designers evaluate the operation and performance of the TPS62270
DC/DC converter. This converter is a 2.25 MHz, synchronous, step-down converter capable of providing
400 mA of output current.
Related Documentation From Texas Instruments
TPS62270 data sheet ( SLVS799 ), 2.25 MHz 400-mA Step Down Converter With Selectable VOUT .
SLVU234 – February 2008 TPS6227xEVM-306 1
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