R1170H Series

800mA LDO Regulator for Automotive Applications


Data Sheet

Data Sheet

The R1170x Series are positive voltage regulator ICs by CMOS process. The R1170x Series have features of high ripple rejection, low dropout voltage, high output voltage accuracy, and 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-shunt circuit. Output Voltage of R1170 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 prolong the battery life. These regulators are remarkable improvement on the current regulators in terms of ripple rejection, input transient response, and load transient response.
Maximum Output Current is large for its compact size.
Thus, the R1170x Series are suitable for various power sources for portable appliances.
This device is packaged in SOT-89-5 that achieves high-density mounting on boards.


Input Voltage Range (Maximum Rating) Max. 6V (7.0V)
Supply Current Typ. 80µA
Standby Current Typ. 0.1µA
Output Current Min. 800mA (VIN=VOUT+1.0V)
Dropout Voltage Typ. 0.12V (VOUT=3.0V, IOUT=300mA)
Output Voltage Accuracy ±2.0%
Temperature-Drift Coefficient of Output Voltage Typ.±100ppm/°C
Line Regulation Typ. 0.05%/V
Output Voltage 1.5V to 5.0V (0.1V steps)
Ripple Rejection TYP. 50 dB
Package SOT-89-5
Built-in Current Limit Circuit
Built-in Thermal Shutdown Circuit
Ceramic capacitors are recommended to be used with this IC


  • Power source for accessories such as car audios, car navigation systems, and ETC systems
  • Power source for ECUs such as EV inverter and battery charge control unit

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Data Sheet Package Quality Assurance Data Suffix Composition & Content*1
R1170H Series SOT-89-5 Contact us*2 -HE Sn (Sn: 100%)
Reliability -AE
  • *1The composition of the product cannot be specified.
  • *2The reliability information is not listed for devices above rank2. Please contact Ricoh sales representatives for further informations.

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