R1180N Series



Data Sheet

Data Sheet

The R1180x is a CMOS-based voltage regulator IC with high output voltage accuracy, extremely low supply current, and low ON-resistance. This IC consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a current limit circuit which prevents the destruction by excess current, and so on. The output voltage is fixed with high accuracy. B version has a chip enable pin, therefore ultra-low consumption current standby mode can be realized with the pin.
The R1180x is available in SOT-23-5 package which is possible to mount at high density.


Input Voltage Range (Maximum Rating) 1.7V to 6.0V (6.5V)
Supply Current Typ. 1.0µA
(Except the current through CE pull-down circuit)
Standby Mode Typ. 0.1µA
Dropout Voltage Typ. 0.25V (IOUT=150mA 3.0V Output type)
Temperature-Drift Coefficient of Output Voltage Typ. ±100ppm/°C
Line Regulation Typ. 0.05%/V
Output Voltage Accuracy ±2.0%
Packages SOT-23-5
Output Voltage Range 1.2V to 3.6V (0.1V steps)
Built-in Fold Back Protection Circuit Typ. 40mA (Current at short mode)
Recommended Ceramic Capacitor to IC 0.1µF or more


  • Power source for car accessories including car audio equipment, car navigation system, and ETC system.
  • Power source for control units including EV inverter and charge control.

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Data Sheet Package Quality Assurance Data Suffix Composition & Content*1
R1180N 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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