TPS6521825_V01 datasheet(92/109 Pages) TI1

92 / 109 page

PGOOD_BU

IN_nCC

IN_BU

FB5

DCDC5

FB6

DCDC6

SYS_BU

DCDC6 (1.8 V)

DCDC5_PG

DCDC6_PG

Always-on coin-cell battery backup supplies

DCDC6 (1.8 V)

4.7 …F

2.7-V to 5.5-V

system power

To SOC

22 …F

IN_BIAS

INT_LDO

BIAS

100 nF

1 …F

10 µH

From 2.7-V to 6.5-V

system power

VDD_18 (1.8 V)

Battery backup

domain supply

VDD_10 (1 V)

Battery backup

domain supply

TPS6521825

SLDS260 – NOVEMBER 2019

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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.

6.1

Application Information

The TPS6521825 is designed to pair with various application processors. The typical application in

Section 6.2 is based on and uses terminology consistent with the Sitara™ family of processors.

6.1.1

Applications Without Backup Battery

In applications that require always-on supplies but no battery backup, the CC input to the power path must

be connected to ground.

Figure 6-1. CC Input to Power Path

NOTE

In applications without backup battery, CC input must be tied to ground.

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