Seiko Instruments' S-1142 Voltage Regulator Has a High Voltage, Low Current Consumption, Low Dropout CMOS Design

Top Quote Seiko's S-1142 is used as a constant-voltage power supply for electrical applications for vehicle interiors and as a constant voltage power supplies for electronic home appliances. End Quote
  • (1888PressRelease) July 15, 2010 - Seiko Instruments has developed the S-1142 Series high-withstand voltage CMOS process positive voltage regulator that has a low current consumption and a high output voltage accuracy. Operating at a high maximum voltage of 50V and a low current consumption of 4.0A (Typ.), the S-1142 has a built-in low on-resistance transistor providing a very small dropout voltage and a large current. In addition, the S-1142 has a built-in power-off circuit.

    An over-current protector prevents the load current from exceeding the capacitance of the output transistor, while a built-in thermal shutdown circuit prevents damage caused by heat. High density mounting can be achieved by utilizing a high heat radiation HSOP-6 package.

    Typical S-1142 Series Features Include:
    Output voltage: 2.0 V to 12.0 V, selectable in 0.1 V step
    Low equivalent series resistance capacitor: Ceramic capacitor of 0.1 F or more can be used as the I/O capacitor.
    Input voltage: 3.0 V to 50 V
    High-accuracy output voltage: 1.0% (at Tj = +25C), 3.0% (Tj = -40C to +105C)
    Low current consumption: During operation: 4.0 A typ., 9.0 A max. (Tj = -40C to +105C)
    During shutdown: 0.1 A typ., 1.0 A max. (Tj = -40C to +105C)
    Output current : 200 mA (at VIN ≥ VOUT(S) + 2.0 V) (*1)
    Built-in over-current protector: Limits over-current of output transistor
    Operation temperature range: -40C to +105C (S-1142xxxH only), -40C to +85C (S-1142xxxl only)
    Built-in thermal shutdown circuit: Prevents damage caused by heat
    Built-in power on/off circuit: Longer battery life
    Small package: HSOP-6
    RoHS Compliant Product
    (*1) Attention should be paid to the power dissipation of the package when the output is large.
    Typical Application for the S-1142 Series Include:
    Constant-voltage power supply for electrical applications for vehicle interiors
    Constant voltage power supplies for electronic home appliances

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