RICOH Manuals

The R5323x series is a CMOS-based voltage regulator IC with high output voltage accuracy, low supply current, low dropout, and high ripple rejection. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, resistors for setting Output Voltage, a current limit circuit, and a chip enable circuit. These ICs perform with low dropout voltage due to built-in transistor with low ON resistance, and a chip enable function prolongs the battery life of each system. The line transient response and load transient response of the R5323x Series are excellent, thus these ICs are very suitable for the power supply for hand-held communication equipment. The output voltage of these ICs is internally fixed with high accuracy. Since the packages for these ICs are SOT-23-6 (Limited), DFN(PLP)1820-6 and WLCSP-6-P1 package, dual LDO regulators are included in each package, high density mounting of the ICs on boards is possible.

File format: PDF Size:346 KB

The R5323x Series is a CMOS-based dual output LDO regulator with 150mA output. It also features standby mode and auto-discharge function. Ceramic capacitors can be used.

File format: PDF Size:176 KB

RN5RF Series are CMOS-based voltage regulator ICs which control external driver transistors with high ripple rejection, high accuracy output voltage, low supply current. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, output voltage setting resistor, short circuit current limiting circuit and chip enable circuit. These ICs are suitable for constructing regulators with ultra low dropout voltage and an output current in the range of several tens of mA and several hundreds mA. In addition to low supply current by CMOS process, chip enable function can be used to conserve battery life during standby. Furthermore, a supreme ripple rejection and a transient response are suitable for portable communicator such as cell phones, PDAs, walky talkies. SOT23-5 (Mini Mold) package is available.

File format: PDF Size:257 KB

RN5RF series are CMOS-based LDO regulators with external power transistor. By using an external PNP transistor, a low dropout voltage regulator ranging from several tens of mA to several hundreds mA can be configured.

File format: PDF Size:198 KB

The RP108J Series are CMOS-based voltage regulator ICs featuring 3A output with low ON-resistance. Each IC of this series consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a fold-back protection circuit, and a thermal shutdown circuit. This series features both low supply current and high output current, and the dropout voltage is much smaller than bi-polar's. The minimum input voltage is as low as 1.6V and the output voltage can be set from 0.8V, therefore it can be connected with the DC/DC converter as the latter power supply for high density LSI that is operated by low output voltage. The output voltage of RP108J081x is externally adjustable by using external divide resistors. The CE pin of the RP108J Series can switch the regulator to standby mode. In addition to a fold-back protection circuit, which is already built in the conventional regulators, this series contain a thermal shutdown circuit, a constant slope circuit as a soft-start function and a reverse current protection circuit. Ceramic capacitors can be used.

File format: PDF Size:532 KB

RP108J Series Low Voltage 3A LDO Regulator with Ext. VOUT Adjustable

File format: PDF Size:313 KB

The R1171x Series are CMOS-based positive voltage regulator ICs, featuring low dropout voltage, high output voltage accuracy, and low consumption current. Each of these ICs consists of a voltage reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at short mode, a chip enable circuit, and thermal shutdown circuit. The output voltage of R1171 is fixed in the IC. Low consumption current by the merit of CMOS process and built-in transistors with low ON-resistance make low dropout voltage and chip enable function prolongs the battery life. These regulators are remarkable improvement on the current regulators in terms of input transient response, and load transient response. Thus, the R1171x Series are suitable for various power sources. Since the packages for these ICs are high wattage HSOP-6J package, TO-252-5-P1, high density mounting of the ICs on boards is possible.

File format: PDF Size:515 KB

The R1171x Series are CMOS-based LDO regulators featuring 2A/1.5A output. The TO-252-5-P1 and the HSOP-6J that support high wattage can provide the output current up to 2A and 1.5A, respectively. The CMOS process provides both high output current and low supply current. The dropout voltage is significantly lower than bipolar regulators. The CE pin can switch the regulator into standby mode. In addition to a fold-back protection circuit built into conventional LDO regulators, R1171x has a thermal shutdown circuit. Ceramic capacitors can be used.

File format: PDF Size:229 KB

RP132x SERIES Low on Resistance / Low Voltage 1A LDO

File format: PDF Size:913 KB

EK-265-111003 is a 1A low voltage LDO chip from ROHM. The chip is manufactured using CMOS technology and has low on-resistance and excellent load regulation. The output voltage range is 0.8V to 5.5V and can be set using an external resistor. The chip also has overcurrent protection and undervoltage protection functions.

File format: PDF Size:368 KB

File format: PDF Size:0 KB

RP131x Series Low Voltage 1A LDO is based on CMOS process and features 1A output with low on-resistance. CMOS process provides both large output current and low supply current. Dropout voltage is significantly lower than bipolar regulators. RP131x handles low voltage with an input voltage from 1.6V and an output voltage from 0.8V. Accordingly, the device supports highly integrated, low voltage-driven LSI as a rear stage of the DC/DC converter. CE pin can switch the regulator into standby mode. In addition to a fold-back protection circuit built into conventional LDO regulators, RP131x has a thermal shutdown circuit and inrush current limit circuit. Ceramic capacitors can be used.

File format: PDF Size:257 KB

R1501x series are CMOS-based positive voltage regulator (VR) ICs. The R1501xxxxB has features of high input voltage operating, 1A output current drive, and low supply current.

File format: PDF Size:361 KB

The R1501x Series is a CMOS-based voltage regulator with a 1A output current and 24V input voltage. The R1501x series provides high input voltage operation and low on-resistance (at VOUT = 10V, below 0.6Ω) due to the use of CMOS transistor. In addition to a fold-back protection circuit built into conventional regulators, R1501x contains a thermal shutdown circuit. Besides the low supply current by CMOS, the operating temperature is -40°C to 105°C and the maximum input voltage is 24V, the R1501x series are very suitable for power source of car accessories.

File format: PDF Size:209 KB

The R1190x series is a low supply current voltage regulator with high output voltage accuracy. The maximum operating voltage is 16V and the output current is 1A. Each of these ICs consists of a voltage reference unit, an error amplifier, a resistor-net for voltage setting, as a short current protection, a peak current protection, a thermal shutdown, an inrush current limit and a chip enable circuit. The wide input voltage range (Max. 16V). Additionally, the output voltage is fixed internally, in the range from 2.0V to 12.0V by the 0.1V steps. The supply current of R1190x series is excellent (Typ. 150μA) moreover R1190x series has the standby mode (Typ. 0.1μA) by the chip enable function. Since the package for these ICs are TO-252-5-P2, SOT-89-5 and HSOP-6J with high power dissipation, high density mounting of the ICs on boards is possible.

File format: PDF Size:338 KB

The R1190x Series are CMOS-based 16V input voltage regulators featuring 1A output. These are suitable for digital home appliances, in which only bipolar types could previously operate. So R1190x contributes to save energy. R1190x has an inrush current limit circuit that limits approximately 300mA when the voltage regulator turns on. It is also possible to set the inrush current limit time by connecting a capacitor with DELAY pin. In addition to TO-252-5-P2 and HSOP-6J packages, a SOT-89-5 package with high-density mounting is available.

File format: PDF Size:180 KB

The R1173x Series are CMOS-based positive voltage regulator ICs. The R1173x Series have features of super low dropout, 1A output current capability, and -3mV typical load regulation at 1A. Even the output voltage is set at 1.5V, on resistance of internal FET is typically 0.32Ω. Therefore, applications that require a large current at small dropout are suitable for the R1173x series. Low input voltage is acceptable and low output voltage can be set. The minimum input voltage is 1.4V, and the lowest set output voltage is 0.8V. Each of these ICs consists of a voltage reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at over-current, a chip enable circuit, a thermal-shutdown circuit, and so on. A stand-by mode with ultra low consumption current can be realized with the chip enable pin. The output voltage types of R1173 are fixed one in the IC and adjustable one (R1173x001x). Since the packages for these ICs are the SOT-89-5 package, HSON-6, or HSOP-6J, high density mounting of the ICs on boards is possible.

File format: PDF Size:614 KB

The R1173x Series is a CMOS-based LDO regulator featuring 1A output. It offers almost the same basic performances as the R1172x Series, but with excellent load regulation.

File format: PDF Size:232 KB

R1172x SERIES SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO

File format: PDF Size:513 KB

R1172x Series 1A LDO is a CMOS-based linear regulator featuring 1A output. CMOS process provides both high output current and low supply current. The dropout voltage is significantly lower than bipolar regulators. R1172x handles low voltage with an input voltage from 1.4V and output voltage from 0.8V. Accordingly, the device supports highly integrated, low voltage-driven LSI as a rear stage of the DC/DC converter. The CE pin can switch the regulator into standby mode. In addition to a fold-back protection circuit built into conventional LDO regulators, R1172x has a thermal shutdown circuit and inrush current limit circuit. Ceramic capacitors can be used

File format: PDF Size:244 KB