Low Voltage 400 mA LDO Regulator
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)
Contact Ricoh sales representatives for other voltages.
|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|
|DFN1212-5||RP105L||to be prepared|
All PDF files are less than 1MB unless otherwise stated.
SC-88A (RP105Q Series) are already discontinued. Providing only for the customer under present adoption with stock.
- Technical Support