TPS2000C datasheet(17/50 Pages) TI2

17 / 50 page

GND

FAULT

Control

Signal

4.5 V-6.5 V

0.1PF

COUT

Fault

Signal

Power

Pad

VOUT

OUT

RFAULT

TPS2065CDGN

1/2

6/7/8

TPS2000C, TPS2001C, TPS2041C, TPS2051C, TPS2061C

TPS2065C, TPS2065C-2, TPS2068C, TPS2069C, TPS2069C-2

www.ti.com

SLVSAU6H – JUNE 2011 – REVISED APRIL 2016

Product Folder Links: TPS2000C TPS2001C TPS2041C TPS2051C TPS2061C TPS2065C TPS2065C-2 TPS2068C

TPS2069C TPS2069C-2

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9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The TPS20xxC and TPS20xxC-2 current-limited power switch uses N-channel MOSFETs in applications

requiring continuous load current. The device enters constant-current mode when the load exceeds the current

limit threshold.

9.2 Typical Application

Figure 23. Typical Application Schematic

9.2.1 Design Requirements

For this design example, use the following input parameters:

1. The TPS2065CDGN operates from a 5-V to ±0.5-V input rail.

2. What is the normal operation current, for example, the maximum allowable current drawn by portable

equipment for USB 3.0 port is 900 mA, so the normal operation current is 900 mA, and the minimum current

limit of power switch must exceed 900 mA to avoid false trigger during normal operation. For the TPS2065C

device, target 1-A continuous output current application.

3. What is the maximum allowable current provided by up-stream power, the maximum current limit of power

switch that must lower it to ensure power switch can protect the up-stream power when overload is

encountered at the output of power switch. For the TPS2065C device, the maximum IOS is 1.8 A.

9.2.2 Detailed Design Procedure

To begin the design process a few parameters must be decided upon. The designer must know the following:

1. Normal input operation voltage

2. Output continuous current

3. Maximum up-stream power supply output current

9.2.2.1 Input and Output Capacitance

Input and output capacitance improves the performance of the device; the actual capacitance must be optimized

for the particular application. For all applications, TI recommends placing a 0.1-µF or greater ceramic bypass

capacitor between IN and GND, as close to the device as possible for local noise decoupling.

TPS2000C Datasheet(PDF) 17 Page - Texas Instruments

TPS2000C Datasheet(HTML) 17 Page - Texas Instruments

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