TPS82140

12V

R1

124k

R2

100k

V

IN

POWER GOOD

VIN

EN

C2

22µF

R3

100k

V

OUT

1.8V/2A

C1

10µF

SS/TR

GND

PG

FB

VOUT

C3

3.3nF

Copyright © 2017, Texas Instruments Incorporated

11

TPS82140

www.ti.com

SLVSDN3 – JUNE 2017

Product Folder Links: TPS82140

Submit Documentation Feedback

Copyright © 2017, Texas Instruments Incorporated

8 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.

8.1 Application Information

The output voltage of the TPS82140 is adjusted by component selection. The following section discusses the

design of the external components to complete the power supply design for several input and output voltage

options by using typical applications as a reference.

8.2 Typical Applications

8.2.1

1.8-V Output Application

space

Figure 5. 1.8-V Output Application

8.2.1.1 Design Requirements

For this design example, use the following as the input parameters.

Table 2. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage range

12V

Output voltage

1.8V

Output ripple voltage

< 20mV

Output current rating

2A

The components used for measurements are given in the following table.

(1)

SeeThird-party Products Disclaimer

Table 3. List of Components

REFERENCE

MANUFACTURER

C1

10 µF, 25 V, X7R, ±20%, size 1206, C3216X7R1E106M160AE

TDK

C2

22 µF, 10 V, X7S, ±20%, size 0805, C2012X7S1A226M125AC

TDK

C3

3300 pF, 50 V, ±5%, C0G/NP0, size 0603,

GRM1885C1H332JA01D

Murata

R1, R2, R3

Standard