S-8426A Series

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BATTERY BACKUP SWITCHING IC

© SII Semiconductor Corporation, 2006-2015

1

The S-8426A Series is a CMOS IC designed for use in the switching circuits of primary and backup power supplies on a

single chip. It consists of two voltage regulators, three voltage detectors, a power supply switch and its controller, as well as

other functions.

In addition to the switching function between the primary and backup power supply, the S-8426A Series can provide the

micro controllers with three types of voltage detection output signals corresponding to the power supply voltage.

Moreover adopting a special sequence for switch control enables the effective use of the backup power supply, making this

IC ideal for configuring a backup system.



Features

• Low power consumption

Normal operation:

15

Backup:

4.5

μA Max.

• Voltage regulator

Output voltage tolerance :

±2%

Output voltage:

Independently selectable in 0.1 V steps in the range of 2.3 to 5.4 V

• Three built-in voltage detectors (CS, PREEND , RESET )

Detection voltage precision:

±2%

Detection voltage:

Selectable in 0.1 V steps in the range of 2.4 to 5.3 V (CS voltage detector)

Selectable in 0.1 V steps in the range of 1.7 to 3.4 V ( PREEND , RESET voltage

detector)

• Switching circuit for primary power supply and backup power supply configurable on one chip

• Efficient use of backup power supply possible

• Special sequence

Backup voltage is not output when the primary power supply voltage does not reach the initial voltage at which the

switch unit operates.

*1. Refer to “ Product Name Structure” for details.



Applications

• Video camera recorders

• Still video cameras

• Memory cards

• SRAM backup equipment



Packages

• 8-Pin TSSOP

• 8-Pin SOP(JEDEC)