Low Voltage 400mA LDO Regulator
The RP105x Series are 400mA output type CMOS-based voltage regulator ICs with capability of low input voltage (Min. 0.9V) and low output voltage (Min. 0.6V). These ICs are 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. 2.4V). Each of these ICs 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 Series have the ultra low on resistance output driver, the on resistance is Typ. 0.4Ω (VOUT=0.8V, IOUT=300mA). The built-in driver is Nch MOSFET, thus the load transient response is excellent, (under the condition of the current between 1mA and 400mA, tr=0.5μs, the undershoot level is approximately 50mV).
The output voltage of these ICs is fixed with high accuracy. Since the packages for these ICs are DFN(PLP)1212-6, SOT-23-5 and SC-88A therefore high density mounting of the ICs on boards is possible. |
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 Supply Current |
Typ. 28μA |
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| Supply Current (Standby Mode) |
Typ. 0.1 μA |
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| Ripple Rejection |
Typ. 80dB (f=1kHz, VIN Ripple)
Typ. 50dB (f=1kHz, VBIAS Ripple) |
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| Output Voltage Range |
0.6V to 1.5V (For Standard Voltage, please refer to MARK INFORMATION.) |
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| Input Voltage Range (VBIAS) |
2.4V to 5.25V (VOUT < 0.8V)
Set VOUT+1.6V to 5.25V (VOUT>=0.8V) |
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| Input Voltage Range (VIN) |
0.9V to VBIAS (VOUT < 0.8V)
Set VOUT+0.1V to VBIAS (VOUT>=0.8V) |
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| Output Voltage Accuracy |
Typ. ±15mV (Topt=25°C) |
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| Temperature-Drift Coefficient of Output Voltage |
Typ. ±50ppm/°C |
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| Dropout Voltage |
Typ. 180mV (IOUT=400mA, VOUT=1.5V, VBIAS=3.6V) |
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| Line Regulation |
Typ. 0.02%/V |
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| Packages |
DFN(PLP)1212-6, SC-88A, SOT-23-5 |
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| Built-in Fold Back Protection Circuit |
Typ. 120mA (Current at short mode) |
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| Ceramic capacitors are recommended |
CBIAS=CIN=1.0μF or more, COUT=2.2μF or more |
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Power source for battery-powered equipment.
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Power source for electrical appliances such as cameras, VCRs and camcorders.
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Power source for portable communication equipment.
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| * All PDF files are less than 1MB unless otherwise stated. |
| * If you don't have Adobe Reader, you can download free. |
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Technical Info.
Technical Information on Ricoh Power Management ICs.
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Product Catalog
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| Selection guide is available for download in PDF format. |
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Non-promotion / Discontinued Products
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RP105x
Series
