TPS62870 datasheet(44/66 Pages) TI2

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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, as well as validating and testing their design

implementation to confirm system functionality.

9.1 Application Information

The following section discusses selection of the external components to complete the power supply design for

typical a application.

9.2 Typical Application

VIN

MODE/SYNC

CIN

20 k

6.2 k

VSEL

SDA

SCL

VIO

VIN

3.3 V

COUT

110 nH ±20%

VOSNS

GOSNS

COMP

10 k

3.3 V

FSEL

SYNC_OUT

GND

Load

CC2

0.75 V

1 k

10 pF

Figure 9-1. Typical Application Schematic

9.2.1 Design Requirements

Table 9-1 lists the operating parameters for this application example.

Table 9-1. Design Parameters

SYMBOL

PARAMETER

VALUE

VIN

Input voltage

3.3V

VOUT

Output voltage

0.75V

TOLVOUT

Output voltage tolerance allowed by the application

±3.3%

TOLDC

Output voltage tolerance of the TPS6287x (DC accuracy)

±1%

ΔIOUT

Output current load step

±7.5A (from 3.8A to 11.3A)

Load step transition time

1μs

fSW

Switching frequency

2.25MHz

Inductance

110nH

TOLIND

Inductor tolerance

±20%

Error amplifier transconductance

1.5mS

Internal timing parameter

12.5μs

TPS62870, TPS62871, TPS62872, TPS62873

SLVSGC5E – JANUARY 2023 – REVISED OCTOBER 2025

www.ti.com

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