RP108J SeriesAEC-Q100 Compliant

Low Input Voltage 3A LDO Regulator for Automotive Applications


Data Sheet

Data Sheet
(1.33 MB)

The RP108J is a voltage regulator IC featuring 3 A output with low ON-resistance developed with CMOS process technology.
This device consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a fold-back protection circuit, and a thermal shutdown circuit. This device features both low supply current and high output current, and the dropout voltage is much smaller than bi-polar's. The minimum input voltage is as low as 1.6 V and the output voltage can be set from 0.8 V, therefore it can be connected with the DC/DC converter as the latter power supply for high density LSI that is operated by low output voltage.
The output voltage of RP108J081x is externally adjustable by using external divide resistors. The CE pin of the RP108J can switch the regulator to standby mode. In addition to a fold-back protection circuit, which is already built in the conventional regulators, this device contains a thermal shutdown circuit, a constant slope circuit as a soft-start function and a reverse current protection circuit. Ceramic capacitors can be used.


Input Voltage Range (Maximum Rating) 1.6 V to 5.25 V (6.0 V)
Operating Temperature −40°C to 105°C
Output Current Min. 3 A
Supply Current Typ. 350 µA
Standby Current Typ. 2 µA
Output Voltage Range 0.8 V / 1.2 V / 1.5 V / 1.8 V / 2.5 V / 3.0 V / 3.3 V
*Contact Ricoh sales representatives for other voltages.
RP108J081x: 0.8 V to 4.2 V
Output Voltage Accuracy ±1.0% (Ta = 25°C)
(±15 mV accuracy, when VOUT ≤ 1.5 V)
Output Voltage Temperature-drift Coefficient Typ. ±100 ppm/°C
Ripple Rejection Typ. 65 dB (f = 1 kHz, VOUT=2.5 V)
Dropout Voltage Typ. 0.51 V (VOUT = 2.5 V)
Line Regulation Typ. 0.1%/V
Built-in Fold-back Protection Circuit Typ. 220 mA
Built-in Thermal Shutdown Circuit Stops at 165°C
Built-in Constant Slope Circuit  
Built-in Reverse Current Protection Circuit  
Ceramic capacitors are recommended to be used with this IC 10 µF or more


  • Power source for car accessories including car audio equipment, car navigation system, and ETC system.

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Data Sheet Package Quality Assurance Data Suffix Composition & Content*1
RP108J Series
(1.33 MB)
TO-252-5-P2 Reliability -AE Sn (Sn: 100%)
  • *1The composition of the product cannot be specified.

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