Datasheet

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14 Top Layer................................................................................................................... 13
15 Bottom Layer............................................................................................................... 13
16 Internal Layer 1 ............................................................................................................ 14
17 Internal Layer 2 ............................................................................................................ 14
List of Tables
1 TPS53128EVM-620 Electrical and Performance Specifications...................................................... 2
2 TPS53128EVM-620 Test Points Description............................................................................ 5
3 TPS53128EVM-620 Bill of Materials.................................................................................... 15
1 Introduction
1.1 Description
The TPS53128EVM-620 evaluation board provides the user with a convenient way to evaluate the
TPS53128 Dual D-CAP2™ Mode Control 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 output at up to 4 A from a loosely regulated 12-V
(8-V to 22-V) source, the TPS53128EVM-620 includes switches and test points to assist a user in
evaluating the performance of the TPS53128 controller in their application.
1.2 Application
• Digital television
• Set-top box
• DSL and cable modems
• Cost-sensitive digital consumer products
1.3 Features
• 8-V to 22-V input
• 1.05-V and 1.8-V output
• Up to 4 A per channel output
• 350-kHz psudeo-fixed frequency D-CAP2™ mode control
• Independent enable switches for power-on/power-off testing
2 Electrical Performance Specifications
Table 1. TPS53128EVM-620 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 – mA
V
IN_UVLO
Input UVLO I
OUT
= 4 A 4.0 4.2 4.5 V
OUTPUT CHARACTERISTICS
V
OUT1
Output Voltage 1 V
IN
= 12 V, I
OUT1
= 2 A – 1.05 – V
Line Regulation V
IN
= 8 V to 22 V – – 1%
Load Regulation I
OUT1
= 0 A to 4 A – – 1%
V
OUT1_rip
Output Voltage Ripple V
IN
= 12 V, I
OUT2
= 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
OUT2
= 2 A – 1.80 – V
Line Regulation V
IN
= 8 V to 22 V – – 1%
2
TPS53128EVM-620 SLVU433–February 2011
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