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List of Tables
1 TPS53125EVM-599 Electrical and Performance Specifications...................................................... 2
2 Test Point Description...................................................................................................... 4
3 TPS53125EVM-599 Bill of Materials.................................................................................... 15
1 Description
The TPS53125EVM-599 evaluation board provides the user with a convenient way to evaluate the
TPS53125 Dual Synchronous Step-Down Controller in a realistic cost-sensitive application. Providing both
a low core-type 1.05-V and I/O-type, 1.8-V outputs at up to 4 A from a loosely regulated 12-V (8-V to
22-V) source, the TPS53125EVM-599 includes switches and test points to assist users in evaluating the
performance of the TPS53125 controller in their applications.
1.1 Applications
• Digital television
• Set-top box
• DSL and cable modems
• Cost-sensitive digital consumer products
1.2 Features
• 8-V to 22-V input
• 1.05-V and 1.8-V outputs
• Up to 4 A per channel output
• 350-kHz pseudo-fixed frequency D-CAP2™ mode control
• Independent enable switches for power-on/power-off testing
2 TPS53125EVM-599 Electrical Performance Specifications
Table 1. TPS53125EVM-599 Electrical and Performance Specifications
Parameter Notes and Conditions Min Typ Max Unit
Input Characteristics
V
IN
Input Voltage 8 12 22 V
I
IN
Input Current V
IN
= 12 V, I
OUT1
= 4 A, I
OUT2
= 4 A – 1.2 1.5 A
No Load Input Current V
IN
= 12 V, I
OUT
= 0 A – 20 35 mA
V
IN_UVLO
Input UVLO I
OUT
= 4 4.0 4.2 4.5 V
Output Characteristics
V
OUT1
Output Voltage 1 V
IN
= 12 V, I
OUT
= 2 A 1.03 1.05 1.07 V
Line Regulation V
IN
= 8 to 22 – – 1%
Load Regulation I
OUT
= 0 A to 4 A – – 1%
V
OUT1_rip
Output Voltage Ripple V
IN
= 12 V, I
OUT
= 4 A – – 30 mVpp
I
OUT1
Output Current 1 V
IN
= 8 V to 22 V 0 4 A
V
OUT2
Output Voltage 2 V
IN
= 12 V, I
OUT
= 2 A 1.78 1.80 1.82 V
Line Regulation V
IN
= 8 V to 22 V – – 1%
Load Regulation I
OUT
= 0 A to 4 A – – 1%
V
OUT2_rip
Output Voltage Ripple V
IN
= 12 V, I
OUT2
= 4 A – – 30 mVpp
I
OUT2
Output Current 2 V
IN
= 8 V to 22 V 0 4 A
Systems Characteristics
F
SW
Switching Frequency 200 350 400 kHz
hpk Peak Efficiency V
IN
=12 – 88% –
h Full Load Efficiency V
IN
= 12, I
OUT1
= I
OUT2
= 4 A – 80% –
2
TPS53125EVM-599 SLVU392–July 2010
Copyright © 2010, Texas Instruments Incorporated