R1191 Datasheet, PDF (1/33 Pages) RICOH electronics devices division – Supply Current Typ. 50uA (Fast Mode)

R1191x SERIES
300mA LDO REGULATOR with the Reverse Current Protection
NO.EA-229-111026
OUTLINE
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.
FEATURES
• 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
APPLICATIONS
• Power source for digital home appliances
• Power source for audio visual equipment
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