R1171 Series
1.5A Voltage Regulator

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  • Description

    The R1171 Series are CMOS-based positive voltage regulator ICs. The R1171 Series have features of low dropout voltage, high output voltage accuracy, low consumption current. Each of these ICs consists of a voltage reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at short mode, a chip enable circuit, and thermal shutdown circuit. The output voltage of R1171 is fixed in the IC.

    Low consumption current by the merit of CMOS process and built-in transistors with low ON-resistance make low dropout voltage and chip enable function prolongs the battery life. These regulators are remarkable improvement on the current regulators in terms of input transient response, and load transient response. Thus, the R1171 Series are suitable for various power sources.

  • Spec
    Consumer Automotive
    Input Voltage Range 2.1 V to 6.0 V (7.0 V)
    Operating Temperature Range -40°C to 85°C (125°C)
    Supply Current Typ. 130 µA
    Standby Current Typ. 0.1 µA
    Output Voltage Range 1.5 V to 5.0 V (0.1 V step) 1.5 V to 5.0 V (0.1 V step), 1.85 V, 2.85 V
    Output Voltage Accuracy ±2.0% (Ta = 25°C)
    Output Voltage Temperature Coefficient Typ. ±100 ppm/°C
    Dropout Voltage Typ. 0.09 V (VOUT = 3.0 V, IOUT = 300 mA)
    Line Regulation Typ. 0.05%/V
    Output Current Min 1.5 A (VIN = VOUT + 1.0 V)
    Ripple Rejection Typ. 50 dB
    Package HSOP-6J

    Protections / Functions

    TSD Reverse Current Limit ISC Inrush Constant Slope ECO mode Auto Discharge External Driver
  • Technical
    • R1171S301x Dropout Voltage vs. Output Current

      Dropout Voltage vs. Output Current

  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

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Functional Description

TSD Thermal Shutdown Function
Reverse Current Protection Reverse Current Protection
Current Limit Overcurrent Protection
ISC Short Current Protection
Inrush Current Limit Inrush Current Protection
Constant Slope Constant Slope Function
ECO mode ECO Function
Auto Discharge Auto Discharge Function
External Driver External Output Driver Transistor

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