R1

200 k

R2

100 k

SW

AGND

FB

EN

PG

VIN

C3*

C2

10 µF

R3

1 M

C1

10 µF

2.5 V to 5.5 V

1.8 V / 3.0 A

L1

1.0 µH

C3: Optional

TLV62585

Copyright Ú 2016, Texas Instruments Incorporated

PGND

8

TLV62585

SLVSDE5A – JULY 2017 – REVISED AUGUST 2017

www.ti.com

Product Folder Links: TLV62585

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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 TLV62585 is a synchronous step-down converter in which output voltage 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 Application

Figure 4. 1.8-V Output Voltage 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

3 A

(1)

See Third-Party Products disclaimer.

Table 3 lists the components used for the example.

REFERENCE

DESCRIPTION

MANUFACTURER

C1

10 µF, Ceramic capacitor, 10 V, X7R, size 0805, GRM21BR71A106ME51

Murata

C2

22 µF, Ceramic capacitor, 6.3 V, X7T, size 0805, GRM21BD70J226ME44

Murata

C3

Optional

Std

L1

1 µH, Power Inductor, size 4 mm × 4 mm × 1.5 mm, XFL4020-102ME

Coilcraft

R1

Depending on the output voltage, 1%, size 0603;

Std

R2

100 kΩ, Chip resistor, 1/16 W, 1%, size 0603;

Std

R3

1 MΩ, Chip resistor, 1/16 W, 1%, size 0603

Std