The R1118x series are CMOS-based voltage regulator ICs with ultra low supply current (Typ.5.5μA), and remarkable improved transient response compared with the conventional low supply current voltage regulator. The supply current of these ICs is automatically shifts between fast mode and low power mode, it depending on the load current. The current threshould is fixed internally. R1118x shifts from low power mode to fast response mode at IOUT=7mA (Typ.) and shifts fast response mode to low power mode at IOUT=2mA (Typ.). These ICs are capable of the low input voltage (Min.1.4V) and the output voltage range from 0.8V is possible. The output voltage of R1118x is fixed in the IC. Each of these ICs consists of a voltage reference unit, an error amplifier, a resister net for setting output voltage, a current limit circuits for over-current. A standby mode with ultra low supply current can be realized with the chip enable function. Since the packages for these ICs are SOT-23-5 (Limited) and DFN(PLP)1612-4B, therefore high density mounting of the ICs on boards is possible.
The Ricoh R1118x Series consists of CMOS-based voltage regulator ICs designed for ultra-low supply current and improved transient response. These devices automatically shift between fast response mode and low power mode depending on the load current, with a threshold fixed internally at approximately 7mA for switching to fast mode and 2mA for switching to low power mode. The ICs support a low input voltage minimum of 1.4V and offer a fixed output voltage range from 0.8V to 4.2V in 0.1V steps.
| Supply Current (Low Power Mode) | Typ. 5.5uA (Iout=0mA) |
|---|---|
| Supply Current (Fast Mode) | Typ. 50uA (Iout=11mA) |
| Supply Current (Standby Mode) | Typ. 0.1 pA |
| Ripple Rejection | Typ. 70dB (f=1kHz) |
| Input Voltage Range | 1.4V to 6.0V |
| Output Voltage Range | 0.8V to 4.2V (0.1V steps) |
| Output Voltage Accuracy | +1.0% (1.5V < Vout = 3.5V, Topt=25°C) |
| Temperature-Drift Coefficient | Typ. ±100ppm/°C |
| Dropout Voltage | Typ. 0.27V (Iout=150mA, Vout=2.8V) |
| Line Regulation | Typ. 0.02%/V |
| Packages | DFN(PLP)1612-4B, SOT-23-5 |
| Built-in Fold Back Protection | Typ. 40mA |
The supply current in low power mode is typically 5.5uA when the output current is 0mA.
The R1118x shifts from low power mode to fast response mode at an output current of 7mA (Typ.).
Ceramic capacitors with a capacitance of 1.0uF or more are recommended for the output.
The available packages are DFN(PLP)1612-4B and SOT-23-5.