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1 Introduction
User's Guide
SLVU216 – July 2007
TPS622x0EVM-229
This user’s guide describes the characteristics, operation, and use of the TPS62240EVM-229 and the
TPS62260EVM-229 evaluation modules (EVM). These EVMs demonstrate the Texas Instruments
TPS62240 or the TPS62260, 2.25-MHz, synchronous, step-down converters. The TPS62240 supplies 300
mA of output current and the TPS62260 supplies 600 mA. This user’s guide includes setup instructions,
schematic diagram, bill of materials (BOM), and PCB layout drawings for the evaluation module.
Contents
1 Introduction ................................................................................................................... 1
2 Setup .......................................................................................................................... 2
3 Operation ..................................................................................................................... 3
4 Test Results .................................................................................................................. 3
5 Board Layout, Schematic, and Bill of Materials .......................................................................... 7
List of Figures
1 TPS62240 Start-up From Enable, Vin = 3 V, Vout = 1.8 V, ILoad = 300 mA........................................ 3
2 TPS62240 Output Ripple, Vin = 3 V, Vout = 1.8 V, ILoad = 300 mA ................................................ 4
3 TPS62240 Load Transient, 180-mA to 300-mA Step, Vin = 3 V, Vout = 1.8 V ...................................... 4
4 TPS62240 Load Transient, 300-mA to 180-mA Step, Vin = 3 V, Vout = 1.8 V ...................................... 5
5 TPS62260 Start-up From Enable, Vin = 3 V, Vout = 1.8 V, ILoad = 600 mA........................................ 5
6 TPS62260 Output Ripple, Vin = 3 V, Vout = 1.8 V, ILoad = 600 mA ................................................ 6
7 TPS62260 Load Transient, 180-mA to 540-mA Step, Vin = 3 V, Vout = 1.8 V ...................................... 6
8 TPS62260 Load Transient, 540-mA to 180-mA Step, Vin = 3 V, Vout = 1.8 V ...................................... 7
9 Assembly Layer .............................................................................................................. 8
10 Top Layer Routing ........................................................................................................... 9
11 Bottom Layer Routing ...................................................................................................... 10
12 TPS622x0EVM-229 Schematic........................................................................................... 11
List of Tables
1 TPS622x0EVM-229 Bill of Materials ..................................................................................... 12
The TPS62240EVM-229 and TPS62260EVM-229 evaluation modules (EVM) help designers evaluate the
operation and performance of the TPS62240 and TPS62260 converters. These converters are 2.25-MHz,
synchronous, step-down converters with 300 mA or 600 mA of output current, respectively.
The TPS622x0EVM-229 has two converter layouts on one board, each electrically isolated from the other.
The first converter at the top of the board uses the 2-mm × 2-mm SON package (DRV) with the output
voltage set to 1.8V. This converter has been designed with a maximum solution height of 1 mm. The
second converter, at the bottom of the board, demonstrates the TSOT-23-6 package (DDC) with the
output voltage set to 1.2V. This layout uses a taller inductor with lower losses to achieve higher efficiency
than converter 1. Both layouts use the adjustable output voltage version of the converter along with
0603-sized external parts to ease soldering when evaluating different output voltages.
SLVU216 – July 2007 TPS622x0EVM-229 1
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