RICOH RP111x Series GoodTransientResponse LowVoltage 500mALDO Data Manual
Summary
This CMOS LDO regulator delivers stable power up to 500mA across a wide range, featuring low input voltage (down to 1.4V) and excellent transient response vital for sensitive electronics. The manual provides complete integration details, including operational characteristics, package selection guides (DFN, SOT), pin assignments, and application notes. It is ideal for engineers designing reliable power sources for portable communication equipment, battery-powered devices, and various electrical appliances requiring high efficiency and superior voltage stability.
Page 1 Text Content
RP111x SERIES
Good Transient Response Low Voltage 500m A LDO
NO.EA-241-111228
OUTLINE The RP111x Series are CMOS-based LDO regulators featuring 500m A output current. The input voltage is as low as 1.4V and the output voltage can be set from 0.7V. Due to a built-in 0.46Ω (at VOUT=2.8V) on-resistor, RP111x can provide a low dropout voltage. RP111x also features an excellent line transient response, ripple rejection at 75d B, and low noise. The output voltage accuracy is as high as ±0.8% and the temperature drift coefficient of output voltage is low at ±30ppm/℃. The accuracy of the output voltage of RP111x includes the temperature characteristics and the load transient response has been improved. The typ. and max value of under/overshoot for various output current are shown in the typical characteristics in the datasheet, therefore the accuracy of the output voltage estimation will be easy on the actual operating cases. In addition to a fold-back protection circuit built into conventional regulators, RP111x contains a thermal shutdown circuit and an inrush current limit circuit. SOT-23-5 and SOT-89-5 packages, a 1.2mm square DFN1212-6 package are available.
FEATURES • Supply Current ......................................................Typ. 80μA • Standby Current ....................................................Typ. 0.1μA • Dropout Voltage ....................................................Typ. 0.23V (IOUT=500m A, VOUT=2.5V) • Ripple Rejection....................................................Typ. 75d B (f=1k Hz)
Typ. 70d B (f=10k Hz)
• Output Voltage Accuracy.......................................±0.8% (VOUT ≥1.8V) • Output Voltage Temperature Coefficient ...............Typ. ±30ppm/°C (VOUT ≥1.8V) • Line Regulation .....................................................Typ. 0.02%/V • Packages ..............................................................DFN1212-6, SOT-23-5, SOT-89-5, • Input Voltage Range .............................................1.4V to 5.25V • Output Voltage Range...........................................0.7V to 3.6V (0.1V steps) (For other voltages, please refer to MARK INFORMATIONS.) • Built-in Foldback Protection Circuit .......................Typ. 50m A (Current at short mode) • Thermal Shutdown Temperature...........................165°C • Inrush Current Limit ..............................................Typ.400m A (for 180μs after start-up) • Ceramic capacitors are recommended to be used with this IC .....1.0μF or more
APPLICATIONS • Power source for portable communication equipment. • Power source for electrical appliances such as cameras, VCRs and camcorders. • Power source for battery-powered equipments. • Power source for electrical home appliances.
Page Summary Contents For RICOH RP111x Series GoodTransientResponse LowVoltage 500mALDO Data Manual
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 35 |
| File Size | 1.22 MB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What are the recommended required capacitors for using the RP111x regulator?
Ceramic capacitors of 1.0μF or more are recommended to be used with this IC.
How should I typically connect the VOUT pin in relation to the VFB pin?
Under normal operating conditions, the VOUT pin should be connected to the VFB feed back pin.
What built-in safety features does the RP111x provide besides fold-back protection?
The unit contains both a thermal shutdown circuit and an inrush current limit circuit.
What is the typical dropout voltage for high current output?
The typical dropout voltage is 0.23V, measured at IOUT=500mA and VOUT=2.5V.