RP105x Series

Low Voltage 400 mA LDO Regulator

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

The RP105x is a 400 mA output type CMOS-based voltage regulator with capability of low input voltage (Min. 0.9 V) and low output voltage (Min. 0.6 V). This device is remarkably improved the performance at low input voltage compared with conventional low voltage LDOs, and two power supply voltage type. (Another power source, VBIAS pin voltage must be Min. 2.4 V). The device consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a current limit circuit to avoid the destruction, a UVLO circuit with monitoring input voltage, and so on.
The RP105x has the ultra-low on resistance output driver, the on resistance is Typ. 0.4 Ω (VOUT = 0.8 V, IOUT = 300 mA). The built-in driver is Nch MOSFET, thus the load transient response is excellent, (under the condition of the current between 1 mA and 400 mA, tr = 0.5 µs, the undershoot level is approximately 50 mV).
The output voltage of this device is fixed with high accuracy. Since the packages for the device are DFN(PLP)1212-6, DFN1212-5, SOT-23-5 and SC-88A therefore high density mounting of the IC on boards is possible.

Supply Current Typ. 28 µA
Standby Current Typ. 0.1 µA
Ripple Rejection Typ. 80 dB (f = 1 kHz, VIN Ripple)
Typ. 50 dB (f = 1 kHz, VBIAS Ripple)
Output Voltage Range 0.6 V to 1.5 V (0.1 V step)
Input Voltage Range (VBIAS) 2.4 V to 5.25 V (VOUT < 0.8 V)
Set VOUT + 1.6 V to 5.25 V (VOUT ≥ 0.8 V)
Input Voltage Range (VIN) 0.9 V to VBIAS (VOUT < 0.8 V)
Set VOUT + 0.1 V to VBIAS (VOUT ≥ 0.8V)
Output Voltage Accuracy Typ. ±15 mV (Ta = 25°C)
Temperature-Drift Coefficient of Output Voltage Typ. ±50 ppm/°C
Dropout Voltage DFN1212-5: Typ. 105 mV
(IOUT = 400 mA, VOUT = 1.5 V, VBIAS = 3.6 V)
Line Regulation Typ. 0.02%/V
Packages DFN(PLP)1212-6, SC-88A, SOT-23-5, DFN1212-5
Built-in Fold Back Protection Circuit Typ. 120 mA (Current at short mode)
Ceramic capacitors are recommended CBIAS=CIN=1.0 µF or more, COUT=2.2 µF or more
  • Power source for battery-powered equipment.
  • Power source for electrical appliances such as cameras, VCRs and camcorders.
  • Power source for portable communication equipment.

Data Sheet Flyer Package Info. Mark Info. Quality Assurance Data
RP105x Series
(3.50 MB)
RP105x Series DFN(PLP)1212-6
RP105K Reliability
DFN1212-5 RP105L to be prepared
SOT-23-5 RP105N Reliability

All PDF files are less than 1MB unless otherwise stated.

Note : Discontinued Products
SC-88A (RP105Q Series) are already discontinued. Providing only for the customer under present adoption with stock.

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