RICOH R5322N SERIES Data Sheet
Summary
This high-efficiency R5322N dual LDO regulator is designed for power applications in sensitive battery-powered equipment, such as cellular communicators, cameras, and portable devices. It ensures reliable stable voltage regulation with ultra-low quiescent current, excellent load transient response, and a small SOT-23-6W package. This technical manual provides comprehensive resources covering the product features, detailed electrical specifications (including dropout and ripple rejection), selection guides for optimal output voltages, and recommended usage tips for power supply designers.
Page 1 Text Content
R5322N SERIES
120m A 2ch LDO REGULATORS
NO.EA-077-0606
OUTLINE The R5322N Series are voltage regulator ICs with high output voltage accuracy, low supply current, low dropout, and high ripple rejection by CMOS process. 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 and prolong the battery life of each system. The line transient response and load transient response of the R5322N 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 package for these ICs is SOT-23-6W package, and include 2ch LDO regulators each, high density mounting of the ICs on boards is possible.
FEATURES • Ultra-Low Supply Current..............................................Typ. 75µA (VR1, VR2) • Standby Current ............................................................Typ. 0.1µA (VR1, VR2) • Output Voltage ..............................................................1.5V to 4.0V • Low Dropout Voltage.....................................................Typ. 0.15V (IOUT=100m A ,VOUT=3.0V) • High Ripple Rejection ...................................................Typ. 75d B (f=1k Hz) • High Output Voltage Accuracy ......................................±2.0% • Low Temperature-Drift Coefficient of Output Voltage....Typ. ±100ppm/°C • Excellent Line Regulation .............................................Typ.0.05%/V • Small Packages ..........................................................SOT-23-6W • Built-in chip enable circuit (A/B: active high) • Built-in fold-back protection circuit ................................Typ. 40m A (Current at short mode)
APPLICATIONS • Power source for cellular phones such as GSM, CDMA and various kinds of PCS. • Power source for electrical appliances such as cameras, VCRs and camcorders. • Power source for battery-powered equipment.
Page Summary Contents For RICOH R5322N SERIES Data Sheet
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 25 |
| File Size | 369.20 KB |
| Published | May 27, 2026 |
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Frequently Asked Questions
What is the typical supply current for this regulator?
The typical supply current (Typ) is 75µA for both regulators (VR1, VR2).
How do I select the desired output voltage?
You can select the voltage using a designation that allows stepping by 0.1V in the range of 1.5V to 4.0V on each channel.
Does this IC help save battery life?
Yes, it includes a built-in chip enable function which helps prolong the overall battery life of the system.
What is the maximum supported output current for one channel?
The operating limit for both IOUT1 and IOUT2 is 130 mA.