RICOH R1131N SERIES Owner's Manual User Guide
Summary
Explore the R1131N Series, a high-efficiency CMOS Low Dropout Regulator (LDO) designed for portable and battery-powered electronics. Capable of delivering up to 300mA output from as low as 1.4V, this regulator offers adjustable voltage options (0.8V–3.3V). This guide provides detailed technical specifications, selection criteria, and application details crucial for integrating reliable power solutions into communication equipment, cameras, and home appliances.
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R1131N Series Low Voltage 300m A LDO
The R1131N Series are CMOS-based LDO regulators featuring 300m A output. The input voltage (VIN) is as low as Min. 1.4V and the output voltage can be set from 0.8V. The CE pin can switch the regulator into standby mode. Ceramic capacitors can be used. (VOUT ≥ 1.0V)
FEATURES • Supply Current (ISS) ························Typ. 80μA (VIN=SET VOUT+1.0V, VOUT<1.8V) • Output Voltage Accuracy ················± 2%
Typ. 60μA (Same as above, VOUT ≥ 1.8V) • Temp. coeff. of Output Voltage ·······Typ. ± 100ppm/°C
• Standby Current (Istandby) ·················Typ. 0.1μA (Same as above, in standby) • Line Regulation·······························Typ. 0.01%/V • Dropout Voltage (VDIF) ····················Typ. 0.23V (IOUT=300m A, VOUT=2.8V) • Fold-back Protection Circuit············Current limit Typ. 50m A • Ripple Rejection (RR)·····················Typ. 65d B (f=1k Hz) • Auto-Discharge function ·················D Version • Input Voltage Range (VIN) ···············1.4V to 6.0V • Package··········································SOT-23-5 • Output Voltage Range (VOUT)··········0.8V to 3.3V (internally fixed) • Ceramic capacitors can be used. ···1μF or more (VOUT ≥ 1.0V)
BLOCK DIAGRAMS R1131Nxx1A R1131Nxx1B R1131Nxx1D
CE pin "L" active) (CE pin "H" active) (With Auto-Discharge function)
VDD VOUT VDD VOUT VDD VOUT
ro lt IF
Vref Vref Vref
Current Limit Current Limit Current Limit
CE GND CE GND CE GND
SELECTION GUIDES
Part No. .xx. : Specify the output voltage within the range of 0.8V (.08.) to 3.3V (.33.)
Halogen Free Package Q'ty per Reel
in 0.1V steps. .∗. : Select the polarity of the CE pin from (.A.) "L" active, (.B.) "H" active or
SOT-23-5 3,000 pcs R1131N.xx.1.∗ -TR-FE
(.D.) "H" active with auto-discharge function.
PACKAGES (Top View) TYPICAL CHARACTERISTIC
SOT-23-5 R1131N331x Dropout Voltage vs. Output Current
1 VDD
2 GND
3 CE or CE
4 NC 0.05
5 VOUT
Output Current IOUT (m A)
APPLICATIONS • Power source for hand-held communication equipment, cameras, and VCRs • Power source for battery-powered equipment • Power source for home appliances
No.EK-116-120403 CMOS LDO Regulator
Page Summary Contents For RICOH R1131N SERIES Owner's Manual User Guide
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 2 |
| File Size | 261.74 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
What is the acceptable input voltage range for the R1131N series regulator?
The VIN can operate in a range from 1.4V to 6.0V.
Can the R1131N regulate voltages lower than 1.0V?
Yes, the output voltage (VOUT) can be set in a range of 0.8V to 3.3V.
What components are needed for proper operation?
The design requires ceramic capacitors, specifically 1μF or more, assuming VOUT is 1.0V or greater.
How does the CE pin control the device's power consumption?
By connecting to the CE pin, the regulator can be switched into a standby mode (Istandby typ. 0.1μA).