RICOH Manuals

RP202x SERIES Low Power/Fast MODE alternative 200mA LDO REGULATOR

The RP202x Series is a CMOS-based auto mode switching LDO regulator with a 200mA output. In auto switching mode, the operation can switch automatically to fast response mode or low power mode of the ECO function according to output current. (Automatic switching to fast response mode under IOUT>8mA conditions or to low power mode under IOUT<1mA conditions.) In low power mode, supply current is as low as 2.5μA. In fast response mode, ripple rejection is 70dB and noise is low. RP202x requires neither ECO pin for switching mode nor microcontroller pin. RP202x supports low voltage, featuring input voltage from 1.4V and output voltage from 0.8V. Standby mode and auto-discharge function are also available. In addition to SOT-23-5 and SC-88A packages, and a 1mm square DFN(PLP)1010-4 are also available. RP202x Series contributes to the downsizing of the hand-held equipment because it can use the 0.47μF ceramic capacitor.

The RP201x Series is a series of CMOS-based voltage regulator ICs with high output voltage accuracy, low dropout voltage, and low supply current. The series includes three modes: standby mode, fast response mode, and fast and low power auto-change mode. It also features a current limit circuit for overcurrent protection and an auto ECO mode for reduced supply current at light load. The ICs are available in SOT-23-5, SC-88A, thin DFN(PLP)1212-6, and WLCSP-4-P5 packages, allowing for high-density mounting. The series offers low power consumption and high ripple rejection.

The RP201x series are CMOS-based manual/automatic mode shift LDO regulators featuring 150mA output. In auto switching mode, the operation can switch automatically to fast response mode or low power mode of the ECO function according to output current. (Automatic switching to fast response mode under IOUT>8mA conditions or to low power mode under IOUT<1mA conditions.) In low power mode, supply current is as low as 1.5μA. In fast response mode, ripple rejection is 70dB and noise is low. By inputting control signal into the AE pin, the mode of the regulator can be fixed with fast response mode. In addition to a 0.69mm square WLCSP-4-P5 package and a 1.2mm square DFN(PLP)1212-6 are also available.

The RP173x Series are CMOS-based voltage regulator ICs featuring 150 mA output and low supply current of Typ.2.0μA. Each of these ICs consists of a voltage reference unit, an error amplifier, a resistor-net for voltage setting, a current limit circuit, a chip enable circuit and a Reverse Current Protection Circuit. RP173x Series are suitable for the power source such as the equipment being in the standby-mode. A version with /CE input pin has reduced CE pull-up resistance to make its supply current ultra low. The RP173x Series have Max.11V Input voltage and are applicable to the portable communication equipment that require the 2-cell Li-ion battery. Also they are applicable to the non-portable communication equipments. As this series includes Reverse Current Protection Circuit, there is little leakage current, if it's used as back-up circuit. Since the packages for these ICs are the SOT-23-5 package, SC-88A, or DFN(PLP)1010-4 of 1mm square, high density mounting of the ICs on boards is possible.

RP171x SERIES 150mA 10V INPUT LDO REGULATOR

The RP171x Series are CMOS-based LDO regulators featuring 150mA output current. Due to the 10V maximum input voltage, RP171x can be used for 2 cell lithium-ion battery powered portable appliances and home appliances. RP171x has a fold-back protection circuit, a thermal shutdown circuit and a constant slope circuit. SC-88A and SOT-23-5 packages are available.

The RP130x Series are CMOS-based positive voltage regulator ICs with high ripple rejection, low dropout voltage, high output voltage accuracy and extremely low supply current

The RP130x Series are CMOS-based LDO regulators featuring 150mA output. The RP130x features an excellent line transient response, a high ripple rejection at 80dB, and low noise. The polarity of the CE pin can be selected. The version with auto-discharge function is also available. Compared to existing high-speed lines, the RP130x provides low supply current at Typ. 38μA. The series covers a wide voltage range, including the input voltage range of 1.7V to 6.5V and the output voltage range of 1.2V to 5.3V. Ceramic capacitors can be used.

The RP112x Series are CMOS-based voltage regulator (LDO) ICs, which have been developed using the CMOS process technology, with high output voltage accuracy, low-supply current, low On-resistance transistor, low noise output voltage and high ripple rejection.

EK-258-110331 RP112x series is CMOS low noise LDO regulators featuring 150mA output current. RP112x features ultra low noise and its Ripple Rejection is as low as 80dB at f=1kHz, 75dB at f=10kHz and 65dB at f=100kHz. The Output Noise is also as low as Typ. 10μVrms. It is kept the low level at any output voltage. RP112x is suitable for the power source for the portable music player and RF module that demands for higher level of noise reduction. SOT-23-5 and SC-88A packages, a 1mm square DFN(PLP)1010-4 package are available.

The RP110x Series is a voltage regulator (LDO) IC, which has been developed using the CMOS process technology, with high output voltage accuracy, ultra-low supply current, and low ON-resistance transistor. The IC contains the following components: a voltage reference unit, an error amplifier, a resistor-net for output voltage setting, a current limit circuit for preventing short-circuit, a soft-start circuit, and a chip enable circuit. By minimizing the supply current to 1µA, the IC is able to prolong the battery life of each system. The external capacitor is 0.1µF with phase compensation. The IC also has a constant slope circuit as a soft-start circuit, which does not require any external capacitor. It minimizes the inrush current and prevents the output voltage overshoot at the start-up. In addition to the small packaged SOT-23-5 and SC-88A, the RP110x Series offers the ultra-small DFN(PLP)0808-4 package and DFN1010-4, which enables the high density mounting of LDO regulator.

The R1183Z Series are CMOS-based voltage regulator ICs with extremely low supply current, and low dropout voltage realized with the built-in low ON-resistance Tr. 150mA output current is guaranteed, and the supply current of IC itself is Typ. 1μA at no load. The R1183Z series have almost same characteristics as R1180x Series. Only difference is ultra small chip size package (WLCSP4-P2: 0.79mm×0.79mm) and built-in auto discharge function is available with D version, and output voltage accuracy improved to ±1.2%.