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1 Introduction
User's Guide
SLVU143 – June 2006
TPS74x01EVM-118
This user's guide describes the characteristics, operation, and use of the
TPS74x01EVM-118 evaluation module (EVM). This EVM contains either the
TPS74201, TPS74301 or TPS74401 low dropout linear regulator IC. This user's guide
includes EVM specifications, recommended test setup, test results, bill of materials
(BOM), and a schematic diagram.
Contents
1 Introduction .......................................................................................... 1
2 Input/Output Connector Descriptions ............................................................ 2
3 Board Layout ........................................................................................ 5
4 Bill of Materials and Schematic ................................................................... 8
List of Figures
1 TPS74201 and TPS74401 Startup with 1-ms Soft Startup ................................... 4
2 TPS74201 and TPS74401 Startup with 10-ms Soft Startup .................................. 4
3 TPS74301 Simultaneous Startup ................................................................. 4
4 TPS74301 Ratiometric Startup ................................................................... 4
5 Top Assembly Layer ............................................................................... 5
6 Top Layer ............................................................................................ 5
7 Bottom Layer ........................................................................................ 6
8 Schematic ........................................................................................... 7
List of Tables
1 Typical Performance Specification Summary ................................................... 2
2 HPA118 Bill of Materials ........................................................................... 8
The Texas Instruments TPS74x01EVM-118 evaluation module uses either the TPS74201, TPS74301 or
TPS74401 low-dropout linear regulator IC. These regulators require a low power bias voltage, V
BIAS
, and a
power input voltage, V
IN
. All three regulators are capable of providing output voltages down to 0.8 V and
have an integrated supervisory circuit with open drain output that goes to high impedance when the output
voltage reaches regulation (power good or PG). The TPS74301 can provide up to 1.5 A dc current and
has a TRACK pin which allows the user to input a ramp signal for the output voltage to follow, effectively
implementing either simultaneous or ratiometric sequencing. The TPS74201 and TPS74401 can provide
up to 1.5 A and 3.0 A dc current, respectively, and have a SS pin which allows the user to set the output
voltage's linear ramp rate. The goal of the EVM is to facilitate evaluation of the TPS74x01 ICs.
SLVU143 – June 2006 TPS74x01EVM-118 1
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