RICOH RP105x SERIES Low Voltage 400mA LDO Regulator Data Sheet User Manual
Summary
The RP105x series is a high-performance, CMOS-based Low Dropout Regulator (LDO) designed for powering portable and battery-operated electronics. Capable of handling up to 400mA and featuring ultra-low on resistance and excellent transient response, it provides stable voltage output from minimal input power. This manual provides detailed specifications, technical data, recommended packages (DFN, SOT-23), and application guidance for developers building communication equipment, cameras, and general portable devices requiring highly reliable power management.
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RP105x SERIES
Low Voltage 400m A LDO Regulator
NO.EA-179-120404
OUTLINE The RP105x Series are 400m A 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=300m A). The built-in driver is Nch MOSFET, thus the load transient response is excellent, (under the condition of the current between 1m A and 400m A, tr=0.5μs, the undershoot level is approximately 50m V). 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 (Limited) therefore high density mounting of the ICs on boards is possible.
FEATURES • Supply Current .............................................................Typ. 28μA • Supply Current (Standby Mode)...................................Typ. 0.1 μA • Ripple Rejection...........................................................Typ. 80d B (f=1k Hz, VIN Ripple) .....................................................................................Typ. 50d B (f=1k Hz, VBIAS Ripple) • Output Voltage Range..................................................0.6V to 1.5V (0.1V steps) (For other voltages, please refer to MARK INFORMATIONS.) • Input Voltage Range (VBIAS)..........................................2.4V to 5.25V (VOUT < 0.8V) .....................................................................................Set VOUT+1.6V to 5.25V (VOUT ≥ 0.8V) • Input Voltage Range (VIN) ............................................0.9V to VBIAS (VOUT < 0.8V) .....................................................................................Set VOUT+0.1V to VBIAS (VOUT ≥ 0.8V) • Output Voltage Accuracy..............................................Typ. ±15m V (Topt=25°C) • Temperature-Drift Coefficient of Output Voltage ..........Typ. ±50ppm/°C • Dropout Voltage ...........................................................Typ. 180m V (IOUT=400m A, VOUT=1.5V, VBIAS=3.6V) • Line Regulation ............................................................Typ. 0.02%/V • Packages .....................................................................DFN(PLP)1212-6, SC-88A (Limited), SOT-23-5 • Built-in Fold Back Protection Circuit ............................Typ. 120m A (Current at short mode) • Ceramic capacitors are recommended........................CBIAS=CIN=1.0μF or more, COUT=2.2μF or more
APPLICATIONS • Power source for battery-powered equipment. • Power source for electrical appliances such as cameras, VCRs and camcorders. • Power source for portable communication equipment.
Page Summary Contents For RICOH RP105x SERIES Low Voltage 400mA LDO Regulator Data Sheet User Manual
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 25 |
| File Size | 375.30 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What type and value of capacitors should I use for optimal operation?
Ceramic capacitors are recommended: CBIAS=CIN=1.0μF or more, and COUT=2.2μF or more.
What is the minimum input voltage required for this regulator?
The Input Voltage Range (VIN) starts at 0.9V; however, VBIAS must be a minimum of 2.4V.
How much protection against overcurrent does the device offer?
It features a built-in Fold Back Protection Circuit circuit with a capacity up to Typ. 120mA.
What physical packages are available for this IC series?
The ICs come in DFN(PLP)1212-6, SC-88A (Limited), and SOT-23-5 packages.