RP171N SeriesAEC-Q100 Compliant

150mA 10V LDO Regulator for Automotive Applications


Data Sheet

Data Sheet

The RP171x is a LDO regulator featuring 150mA output current that is developed with CMOS process technology. The RP171x offers the maximum input voltage of 10V which makes it ideal for the use in car audio equipment, car navigation system and ETC system. The RP171x provides a supply current as low as Typ. 23µA and achieves fast-response characteristics.
The RP171x offers an output voltage as low as 1.2V. Compared to existing high-speed lines, the RP171x provides excellent output voltage accuracy and output voltage temperature coefficient Internally, the RP171x consists of a fold-back protection circuit and a thermal shutdown circuit. A standby mode with ultra low supply current has been realized by a chip enable function.
The RP171x is available in a 5-pin SOT-23-5 package with high power dissipation.


Input Voltage Range (Absolute Maximum Ratings) 2.6Vto 10V (12V)
Operating Temperature −40°C to 105°C
Supply Current Typ. 23µA (VIN = VSET +1.0V)
Standby Current Typ. 0.1µA (VIN = 10.0V, CE = “L”)
Output Voltage Range 1.2V / 1.5V / 1.8V / 2.5V / 2.8V / 3.0V / 3.3V / 3.4V / 5.0V / 6.0V
* Contact Ricoh sales representatives for other voltages.
Output Voltage Accuracy ±1.0%
Output Voltage Temperature Coefficient Typ. ±80ppm/°C
Line Regulation Typ. 0.02%/V
Dropout Voltage Typ. 0.4V (IOUT = 150mA, VSET = 2.8V)
Ripple Rejection Typ. 70dB (f = 1kHz)
Fold-back Protection Circuit Typ. 40mA
Constant Slope Circuit (Soft-start Function)  
Thermal Shutdown Circuit Stops at 165°C
Auto-discharge Function RP171xxxxD
Ceramic Capacitor Compatible 1.0µF or more


  • Power source for car audio equipment, car navigation system, ETC system, etc.

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Data Sheet Package Quality Assurance Data Suffix Composition & Content*1
RP171N Series SOT-23-5 Contact us*2 -JE 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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