Electrical Performance Specification
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1.1.2 Printed-Circuit Board Assembly
The TPS65023B/TPS650231EVM-664 PCB contains the TPS65023B/TPS650231 IC and its required
external components. This board contains several jumpers and connectors that allow the user to
customize the board for specific operating conditions.
1.1.3 USB-to- I
2
C Adapter
The USB-to-I
2
C Adapter, also known as the HPA172, is the link that allows the PC and the EVM to
communicate. The adapter connects to the PC with the supplied USB cable on one side and to the EVM
though the supplied ribbon cable on the other. When the user writes a command to the EVM, the interface
program, which is run from the PC, sends the command to the PC USB port. The adapter receives the
USB command and converts the signal to an I
2
C protocol. It then sends the I
2
C signal to the
TPS65023B/TPS650231 board. When the user reads a status register from the EVM, the PC sends a
command to read a register on the EVM. When the EVM receives the command, it reports the status of
the register via the I
2
C interface. The adapter receives the information on the I2C interface, converts it to a
USB protocol, and sends it to the PC.
1.1.4 Software
Texas Instruments provides software to assist the user in evaluating this EVM. To install the software, go
to the Texas Instruments Web page and download the latest software version from the TPS65023B or
TPS650231 product folder. Once you have downloaded the software, execute the setup file, and follow
the instructions given.
1.2 Features
• Three high-efficiency DC/DC step-down converters (1.7 A/1.2 A/1 A)
• 2 x 200-mA low-dropout (LDO) regulators
• 30-mA RTC (Reel Time Clock) LDO
• I2C Interface (100-ns setup and hold time)
• Dynamic voltage scaling DCDC1
2 Electrical Performance Specification
Table 1. EVM Ordering Options
Default Output Voltages
Orderable EVM Device Part
Number Number
DCDC1 DCDC2 DCDC3 LDO1 LDO2
TPS65023BEVM-664 TPS65023B 1.2V / 1.6V 1/8V / 3.3V 1.8V / 3.3V SeeTable 2 SeeTable 2
TPS650231EVM-664 TPS650231 1.2V / 1.6V n/a 1.8V / 3.3V See Table 3 See Table 3
Table 2. Default LDO Output Voltages TPS65023B
DEFLDO2 DEFLDO1 VLDO1 VLDO2
0 0 1.3 V 3.3 V
0 1 2.8 V 3.3 V
1 0 1.3 V 1.8 V
1 1 1.8 V 3.3 V
Table 3. Default LDO Output Voltages TPS650231
DEFLDO2 DEFLDO1 VLDO1 VLDO2
0 0 1.3 V 3.3 V
0 1 2.8 V 3.3 V
1 0 1.3 V 1.8 V
1 1 2.1 V 3.3 V
2
TPS65023B/TPS650231EVM SLVU394–October 2010
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