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Overview - S-8426A series

Battery Backup Switching IC S-8426A series

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.

DATA SHEET
2010.8.25

Features


    • Low power consumption
      Normal operation: 15 µA max. (Vin = 6 V)
      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.
    • Package: 8-Pin TSSOP, 8-Pin SOP
    • Lead-free products

Applications


    • Video camera recorders
    • Still video cameras
    • Memory cards
    • SRAM backup equipment

Standard Circuit