RP108J Series

Low Input Voltage 3A LDO Regulator

Data Sheet / Flyer
Data Sheet * Flyer
(1.25 MB)    

The RP108J is a CMOS-based voltage regulator IC featuring 3 A output with low ON-resistance.
The RP108J consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a fold-back protection circuit, and a thermal shutdown circuit. The RP108J 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, The RP108J 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.

Output Current Min. 3 A
Supply Current Typ. 350 µA
Standby Current Typ. 2 μA
Input Voltage Range 1.6 V to 5.25 V
Output Voltage Range Fixed Output Voltage Type: 0.8 V to 4.2 V (0.1 V steps)
* Refer to MARK INFORMATIONS for other voltages.
Adjustable Output Voltage Type: 0.8 V to 4.2 V
Output Voltage Accuracy ±1.0% (±15 mV accuracy, When VSET ≤ 1.5 V)
Output Voltage Temperature-drift Coefficient Typ. ±100 ppm/°C
Ripple Rejection Typ. 65 dB (f = 1 kHz, VSET = 2.8 V)
Dropout Voltage Typ. 0.51 V (VSET = 2.8 V)
Line Regulation Typ. 0.1%/V
Package TO-252-5-P2
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 battery-powered equipments
  • Power source for portable communication equipments such as cameras and VCRs
  • Power source for electrical home appliances

Data Sheet Flyer Package Info. Mark Info. Quality
Assurance Data
RP108J Series
(1.25 MB)
RP108J Series TO-252-5-P2 RP108J Reliability

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