R1171x Series

2.0A/1.5A LDO REGULATOR

Data Sheet / Flyer
Data Sheet * Flyer

The R1171x Series are CMOS-based positive voltage regulator ICs. The R1171x 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 R1171x Series are suitable for various power sources.

Since the packages for these ICs are high wattage HSOP-6J package, TO-252-5-P1, high density mounting of the ICs on boards is possible.

Supply Current Typ. 130µA
Standby Current Typ. 0.1µA
Output Current Min. 1.5A (VIN=VOUT+1.0V, R1171Sxxx1A/B)
Min. 2.0A (VIN=VOUT+1.0V, R1171Jxxx1C/D)
Input Voltage 2.1V to 6.0V
Output Voltage 1.5V to 5.0V (0.1V steps) (R1171Sxx1A/B)
1.8V to 5.0V (0.1V steps) (R1171Jxx1C/D)
(For other voltages, please refer to MARK INFORMATIONS.)
Output Voltage Accuracy ± 2.0%
Low Dropout Voltage Typ. 0.09V (VOUT=3.0V, IOUT=300mA)
Low Temperature-drift Coefficient of Output Voltage Typ. ± 100ppm/°C
Line Regulation Typ. 0.05%/V
Packages HSOP-6J, TO-252-5-P1
Built-in Current Limit Circuit
Built-in Thermal Shutdown Circuit
Ceramic capacitor for phase compensation CIN=COUT=Ceramic 10µF (VOUT<1.8V)
CIN=COUT=Ceramic 4.7µF (VOUT>=1.8V )
  • Local Power source for Notebook PC.
  • Local Power source for portable appliances, cameras, and videos.
  • Local Power source for equipment of battery-use.
  • Local Power source for home appliances.
Data Sheet Flyer Package Info. Mark Info. Quality Assurance Data
R1171x Series R1171x Series HSOP-6J R1171S Reliability
TO-252-5-P1 R1171J Reliability

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