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.
The Ricoh R1171x Series are CMOS-based positive voltage regulator ICs designed with features such as low dropout voltage, high output voltage accuracy, and low consumption current. Each IC includes a voltage reference unit, error amplifier, resistor net for setting output voltage, a current limit circuit at short mode, a chip enable circuit, and a thermal shutdown circuit.
| Supply Current (Typ.) | 0.09V (Vout=3.0V, Iout=300mA) |
|---|---|
| Dropout Voltage (Typ.) | 100ppm/°C |
| Line Regulation | 0.05%/V |
| Packages | HSOP-6J, TO-252-5-P1 |
| Input Voltage Range | 2.1V to 6.0V |
| Output Voltage Range (R1171Sxx1A/B) | 1.5V to 5.0V |
| Output Voltage Range (R1171Uxx1C/D) | 1.8V to 5.0V |
| Operating Temperature | -40 to 85 °C |
They are suitable as local power sources for notebook PCs, portable appliances like cameras and videos, battery-use equipment, and home appliances.
The typical supply current is 0.09V under conditions of Vout=3.0V and Iout=300mA.
The absolute maximum rating for input voltage is 7.0 V.