R1191x Series

300mA LDO REGULATOR with the Reverse Current Protection

Data Sheet / Flyer
Data Sheet * Flyer

R1191x Series are a low supply current voltage regulator with high output voltage accuracy. The maximum operating voltage is 16V. These ICs can switch to the fast mode and the low power mode by the low power / fast mode changer pin (ECO pin) without changing the output voltage value.

Each of these ICs consists of a voltage reference unit, an error amplifier, a resistor-net for voltage setting, a short current limit circuit, a thermal shutdown circuit and a chip enable circuit.

Moreover, the R1191x Series has the reverse current protection function, which protects the reverse current flow into VDD pin when the output pin voltage becomes higher than the VDD pin voltage. Thus it is suitable for the back-up circuit.

Since the packages for these ICs are SOT-89-5, SOT-23-5 and DFN1616-6, therefore high density mounting of the ICs on boards is possible.

Supply Current Typ. 50µA (Fast Mode),
Typ. 6.0µA (Low Power Mode)
Standby Mode Typ. 0.3µA
Reverse Current Max. 0.1µA
Output Current Min. 300mA
Input Voltage Range 3.5V to 16.0V
Output Voltage Range 2.0V to 15.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
Output Voltage Accuracy ±1.5% (Fast Mode)
±2.5% (Low Power Mode)
Temperature-Drift Coefficient of Output Voltage Typ. ±80ppm/°C
Dropout Voltage Typ. 0.55V (Fast Mode, IOUT=300mA, VOUT=5.0V)
Typ. 0.70V (Low Power Mode, IOUT=300mA, VOUT=5.0V)
Ripple Rejection Typ. 60dB (f=1kHz,VOUT=5.0V, Fast Mode)
Line Regulation Typ. 0.02%/V (Fast Mode)
Packages DFN1616-6, SOT-23-5, SOT-89-5
Built-in fold-back protection circuit Typ. 50mA (Current at short mode)
Built-in Thermal Shutdown Circuit Shutdown Temperature at 150°C
Ceramic capacitors are recommended to be used with this IC CIN=2.2µF or more, COUT=4.7µF or more

  • Power source for digital home appliances
  • Power source for audio visual equipment

Data Sheet Flyer Package Info. Mark Info. Quality Assurance Data
R1191x Series
R1191x Series DFN1616-6 R1191L Reliability
SOT-23-5 R1191N Reliability
SOT-89-5 R1191H Reliability

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