R1173 Series
1A Voltage Regulator

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  • Description

    The R1173 Series are CMOS-based LDO regulators featuring 1A output. R1173 offers almost the same basic performances as the R1172 Series. But R1173 offers an excellent load regulation. While the output voltage is internally set in the R1172 Series, the R1173 Series is available in two versions: standard version in which the output voltage is internally set and the adjusted version in which it is set with external resistors. For this reason, when the output voltage is not determined yet, the adjusted version can be used for advanced production. After the final determination of the voltage is made, it can be replaced with the standard version.

  • Spec
    Input Voltage Range 1.4 V to 6.0 V (6.5 V)
    Operating Temperature Range -40°C to 85°C (125°C)
    Supply Current Typ. 60 µA
    Standby Current Typ. 0.1 µA (Topt = 25°C)
    Output Voltage Range Internally Fixed Ver.: 0.8 V to 5.0 V (0.1 V step)
    Externally Adjustable Ver.: 1.0 V to VIN
    Output Voltage Accuracy ±2.0% (Ta = 25°C)
    Output Voltage Temperature Coefficient Typ. ±100 ppm/°C
    Dropout Voltage Typ. 0.32 V (VOUT = 1.5 V, IOUT = 1 A)
    Typ. 0.18 V (VOUT = 2.8 V, IOUT = 1 A)
    Line Regulation Typ. 0.05%/V
    Load Regulation Typ. -2 mV (IOUT = 300 mA)
    Typ. -3 mV (IOUT = 1 A)
    Output Current 1 A
    Ripple Rejection Typ. 70 dB (VOUT = 2.8 V)
    Package SOT-89-5, HSON-6, HSOP-6J

    Protections / Functions

    TSD Reverse Current Limit ISC Inrush Constant Slope ECO mode Auto Discharge External Driver
  • Technical
    • Typical Application: Fixed Output Type

      Typical Application: Fixed Output Type

      C1,C2: 4.7µF or more

    • R1173x301x Dropout Voltage vs. Output Current

      R1173x301x 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.

Download Datasheet

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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Category:LDO Linear Regulators

min (V)
max (V)
min (V)
max (V)
Functions Auto Discharge