RICOH R5322N SERIES APPLICATION MANUAL
Summary
Designed for system engineers developing battery-powered electronics and communication devices, this dual 2-channel Low Dropout Regulator (LDO) provides highly accurate, ultra-low current power management. The R5322N features a compact SOT-23 package with both channels offering adjustable voltage rails (1.5V to 4.0V). This manual is your comprehensive guide, detailing electrical characteristics, part number selection guides, and critical PCB layout techniques necessary for achieving stable performance, exceptional ripple rejection, and maximizing battery life in demanding applications like cellular phones and portable cameras.
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SOT23-6W 120m A 2ch LDO REGULATORS R5322N SERIES APPLICATION MANUAL
NO. EA-077-0012
Page Summary Contents For RICOH R5322N SERIES APPLICATION MANUAL
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SOT23-6W 120m A 2ch LDO REGULATORS R5322N SERIES APPLICATION MANUAL NO. EA-077-0012
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SOT23-6W 120m A 2ch LDO REGULATORS R5322N SERIES OUTLINE The R5322N Series are voltage regulator ICs with high output voltage accuracy, low supply current, low dropout, and high ripple rejection by CM...
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BLOCK DIAGRAM • R5322N×××A CE1 VOUT1 Error Amp. Current Limit Error Amp. Current Limit CE2 VOUT2 CE1 VOUT1 Error Amp. R1-1 Vref Current Limit R2-1 Error Amp. R2-2Current Limit CE2 VOUT2
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SELECTION GUIDE The output voltage, mask option, and the taping type for the ICs can be selected at the users request. The selec- tion can be made with designating the part number as shown below; R53...
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ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit VIN Input Voltage 6.5 VCE Input Voltage (CE Pin) -0.3 ~ VIN+0.3 VOUT Output Voltage -0.3 ~ VIN+0.3 IOUT1 Output Current 1 m A IOUT2 Output Current 2 m ...
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ELECTRICAL CHARACTERISTICS • R5322N×××A/B Topt=25°C Symbol Item Conditions MIN. TYP. MAX. Unit VIN = Set VOUT+1V VOUT VOUT VOUT Output Voltage 1m A ≤ IOUT ≤ 30m A ×0.98 ×1.02 IOUT Output Current VIN ...
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• ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE Topt = 25°C Dropout Voltage Output Voltage VDIF (V) VOUT (V) Condition TYP. MAX. 1.5 ≤ VOUT ≤ 1.6 0.36 0.70 1.7 ≤ VOUT ≤ 1.8 0.30 0.50 1.9 ≤ VOUT ≤ 2.0 I...
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TYPICAL APPLICATION VOUT2 CE2 R5322N×××× SERIES GND VDD VOUT1 CE1 (External Components) Output Capacitor; Tantalum Type
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ut pu t V ol ta ge (V ut pu t V ol ta ge (V ut pu t V ol ta ge (V TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current 1.5V (VR1) 1.5V (VR2) 1.6 1.6 1.4 VIN=2.0V 1.4 VIN=2.0V VIN=1.8V VIN=1.8V...
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2) Output Voltage vs. Input Voltage ut pu t V ol ta ge (V ut pu t V ol ta ge (V ut pu t V ol ta ge (V 1.5V (VR1) 1.5V (VR2) IOUT=1m A IOUT=1m A IOUT=30m A IOUT=30m A IOUT=50m A IOUT=50m A Input Voltag...
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ro po ut ol ta ge IF (V ro po ut ol ta ge IF (V ro po ut ol ta ge IF (V 3) Dropout Voltage vs. Temperature 1.5V (VR1) 1.5V (VR2) Topt=85°C Topt=85°C 25°C 25°C Output Current IOUT(m A) Output Current I...
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4) Output Voltage vs. Temperature ut pu t V ol ta ge (V ut pu t V ol ta ge (V ut pu t V ol ta ge (V 1.5V (VR1) 1.5V (VR2) VIN=2.5V IOUT=30m A VIN=2.5V IOUT=30m A Temperature Topt(°C) Temperature Topt(...
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up pl ur re nt IS (µ up pl ur re nt IS (µ up pl ur re nt IS (µ 5) Supply Current vs. Input Voltage VR1 VR1 VR2 VR2 Input Voltage VIN(V) Input Voltage VIN(V) 4.0V up pl ur re nt IS (µ up pl ur re nt IS...
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2.8V (VR1) ro po ut ol ta ge IF (V up pl ur 2.8V (VR2) re nt IS (µ up pl ur re nt IS (µ VIN=3.8V VIN=3.8V Temperature Topt(°C) Temperature Topt(°C) 4V (VR1) 4V (VR2) VIN=5.0V VIN=5.0V ro po ut ol ta g...
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ip pl ej ec tio (d ip pl ej ec tio (d ip pl ej ec tio (d 8) Ripple Rejection vs. Frequency 1.5V (VR1) 1.5V (VR2) VIN=2.5V+0.5Vp-p VIN=2.5V+0.5Vp-p COUT=tantal 1.0µF Topt=25°C COUT=tantal 1.0µF Topt=25...
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ip pl 2.8V (VR1) ej ec tio (d ip pl ej ec tio 2.8V (VR2) (d ip pl ej ec tio (d VIN=3.8V+0.5Vp-p VIN=3.8V+0.5Vp-p COUT=tantal 2.2µF Topt=25°C COUT=tantal 2.2µF Topt=25°C IOUT=1m A IOUT=1m A IOUT=30m A ...
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ip pl ej ec tio (d ip pl ej ec tio (d ip pl ej ec tio (d 9) Ripple Rejection vs. Input Voltage (DC bias) 2.8V (VR1) 2.8V (VR2) COUT=tantal 2.2µF COUT=tantal 2.2µF IOUT=1m A IOUT=1m A f=1k Hz f=1k Hz f...
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10) Input Transient Response R5322N001× (2.8V, VR1) ut pu t V ol ta ge (V ut pu t V ol ta ge (V ut pu t V ol ta ge (V IOUT=30m A COUT=tantal 1.0µF tr/tf=5µs Topt=25°C Time t(µs) R5322N001× (2.8V, VR1)...
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ut pu t V ol ta ge (V ut pu t V ol ta ge (V ut pu t V ol ta ge (V R5322N001× (2.8V, VR2) IOUT=30m A COUT=tantal 1.0µF tr/tf=5µs Topt=25°C Time t(µs) R5322N001× (2.8V, VR2) IOUT=30m A COUT=tantal 2.2µF...
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11) Load Transient Response R5322N001× (VR1=2.8V) ut pu t V ol ta ge (V ut pu t V ol ta ge (V ut pu t V ol ta ge (V IOUT=50m A 100m A VIN=3.8V CIN=tantal 1.0µF COUT=tantal 1.0µF tr/tf=5µs Topt=25°C IO...
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ut pu t V ol ta ge (V ut pu t V ol ta ge (V ut pu t V ol ta ge (V R5322N001× (VR2=2.8V) IOUT=50m A 100m A VIN=3.8V CIN=tantal 1.0µF COUT=tantal 1.0µF tr/tf=5µs Topt=25°C IOUT2 VOUT1 IOUT1=30m A VOUT2 ...
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TECHNICAL NOTES 1( When using these ICs, consider the following points: In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be ...
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R5322N001× (VR2=2.8V) R5322N001× (VR2=2.8V) CIN=Ceramic 1.0µF CIN=Ceramic 2.2µF COUT=Ceramic 2.2µF COUT=Ceramic 2.2µF Output Current IOUT2(m A) Output Current IOUT2(m A) • Make VDD and GND line suffic...
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 23 |
| File Size | 213.88 KB |
| Published | May 27, 2026 |
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Frequently Asked Questions
What is the typical supply current for the R5322N series?
The typical supply current is 75µA for both VR1 and VR2.
How can I set the output voltage (VOUT)?
Stepwise setting is possible in the range of 1.5V to 4.0V, with a step of 0.1V for each channel.
What type of capacitor do I need for stable operation?
Use a capacitor COUT of 2.2µF or more with good frequency characteristics.
Is this suitable for battery-powered devices?
Yes, it is highly suitable as it maintains low dropout voltage and includes a built-in chip enable circuit to prolong battery life.