R1

200 k

R2

100 k

SW

GND FB

EN

PG

VIN

C3*

C2

10 µF

R3

499 k

C1

4.7 µF

2.5 V to 5.5 V

1.8 V / 1.0 A

L1

2.2 µH

C3: Optional

TLV62568P

Copyright Ú 2016, Texas Instruments Incorporated

9

TLV62568, TLV62568P

www.ti.com

SLVSD89A – NOVEMBER 2016 – REVISED APRIL 2017

Product Folder Links: TLV62568 TLV62568P

Submit Documentation Feedback

Copyright © 2016–2017, 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 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 Application

Figure 5. TLV62568 1.8-V Output Application

8.2.1 Design Requirements

For this design example, use the parameters listed in Table 2 as the input parameters.

Table 2. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage

2.5 V to 5.5 V

Output voltage

1.8 V

Maximum output current

1.0 A

(1)

See Third-party Products Disclaimer

Table 3 lists the components used for the example.

Table 3. List of Components

REFERENCE

DESCRIPTION

C1

4.7 µF, Ceramic Capacitor, 10 V, X7R, size 0805, GRM21BR71A475KA73L

Murata

C2

10 µF, Ceramic Capacitor, 10 V, X7R, size 0805, GRM21BR71A106KE51L

Murata

L1

2.2 µH, Power Inductor, SDER041H-2R2MS

Cyntec

R1,R2,R3

Chip resistor,1%,size 0603

Std.

C3

Optional, 6.8 pF if it is needed

Std.

8.2.2 Detailed Design Procedure

8.2.2.1 Setting the Output Voltage

An external resistor divider is used to set output voltage according to Equation 2.