RICOH R1118x SERIES Owner's Manual User Guide
Summary
This advanced CMOS voltage regulator IC delivers ultra-low current operation while maintaining improved transient response. It features an automatic power management capability, seamlessly shifting between fast and low-power modes based on load demands. With a wide operating range (1.4V–6.0V input), it stabilizes output voltages from 0.8V to 4.2V for reliable performance in portable communication or battery-powered electronics. The manual provides comprehensive details on technical specifications, applications, pin configurations, and selection guides for system engineers designing high-density, low-power circuitry (e.g., cameras and medical devices).
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R1118x SERIES
AUTOMATIC MODE SHIFT / 150m A LOW VOLTAGE REGULATOR
NO.EA-175-120404
OUTLINE 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=7m A (Typ.) and shifts fast response mode to low power mode at IOUT=2m A (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.
FEATURES • Supply Current (Low power Mode) ..............................Typ. 5.5μA (IOUT=0m A) • Supply Current (Fast Mode).........................................Typ. 50μA (IOUT=11m A) • Supply Current (Standby Mode)...................................Typ. 0.1 μA • Ripple Rejection ...........................................................Typ. 70d B (f=1k Hz)
Typ. 60d B (f=10k Hz)
• Input Voltage Range.....................................................1.4V to 6.0V • Output Voltage Range..................................................0.8V to 4.2V (0.1V steps) (For other voltages, please refer to MARK INFORMATIONS.) • Output Voltage Accuracy..............................................±1.0% (1.5V < VOUT 3.5V, Topt=25°C) • Temperature-Drift Coefficient of Output Voltage ..........Typ. ±100ppm/°C • Dropout Voltage............................................................Typ. 0.27V (IOUT=150m A, VOUT=2.8V) • Line Regulation ............................................................Typ. 0.02%/V • Packages......................................................................DFN(PLP)1612-4B, SOT-23-5 (Limited) • Built-in Fold Back Protection Circuit.............................Typ. 40m A • Ceramic capacitors are recommended to be used with this IC 1.0μF
APPLICATIONS • Power source for portable communication equipment. • Power source for electrical appliances such as cameras, VCRs and camcorders. • Power source for battery-powered equipment.
Page Summary Contents For RICOH R1118x SERIES Owner's Manual User Guide
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 22 |
| File Size | 510.52 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What is the input voltage range for this regulator?
The input voltage range is 1.4V to 6.0V.
How does output current affect power consumption?
The supply current automatically shifts from low power mode to fast response mode at IOUT=7mA (Typ.) and back at IOUT=2mA (Typ.).
Is mounting this IC on a dense board possible?
Yes, because the packages are SOT-23-5 and DFN(PLP)1612-4B, high density mounting is possible.
What recommended component should be used with this IC?
Ceramic capacitors rated at 1.0μF are recommended to be used with this IC.