R1130H Series

300mA LDO Regulator for Automotive Applications


Data Sheet

Data Sheet

The R1130x Series are CMOS-based voltage regulator (VR) ICs. VR function has features of high ripple rejection, low dropout voltage, high output voltage accuracy, and ultra-low supply current. Each of these ICs consists of a voltage reference unit, an error amplifier, resistors for setting output voltage, and a current limit circuit. Each of the R1130xxxxA/B type includes also a chip enable circuit.
The output voltage of the R1130xxxxC type is adjustable with external resistors.
The output voltage of R1130xxxxA/B is fixed in the IC. Low supply current by the merit of CMOS process and built-in transistors with low ON-resistance make low dropout voltage. These regulators in the R1130x Series 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.
Since the package for these ICs is the SOT-89-5 package, high density mounting of the ICs on boards is possible.


Input Voltage Range (Maximum Rating) 2.5V to 8.0V (9.0V)
Supply Current Typ. 50µA
Standby Current Typ. 0.1µA (VR) for A type
Chip Enable Function A Type: ”L” Active, B/C Type ”H” Active
Ripple Rejection Typ. 60dB (f=1kHz) (VR)
Output Current Min. 300mA (VIN=VOUT+1V)
Output Voltage Accuracy ±2.0%(VR) for A/B type,
±2.0% (Reference Voltage for adjustable VR) for C type
Dropout Voltage Typ. 0.2V (VOUT=5.0V type) (VR)
Output Voltage Range 1.5V to 5.0V (0.1V steps)
Externally specified with the ADJUST pin
(Reference Voltage 1.8V : C Version)
Temperature-drift Coefficient of Output Voltage ±100ppm/°C
Packages SOT-89-5
Built-in Current Limit Circuit  
Internal Phase Compensation (small output capacitance such as 0.1µF Ceramic can be used with.)


  • 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
R1130H Series
SOT-89-5 Contact us*2 -HE Sn (Sn: 100%)
  • *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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