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The R3111N281C-TR is a voltage regulator IC manufactured by RICOH. Below are its key specifications, descriptions, and features:

Specifications:

• Manufacturer: RICOH
• Part Number: R3111N281C-TR
• Type: Low Dropout (LDO) Voltage Regulator
• Output Voltage: 2.8V (Fixed)
• Output Current: 150mA (Max)
• Input Voltage Range: 2.5V to 6.0V
• Dropout Voltage: 160mV (Typ) @ 100mA
• Quiescent Current: 1.0μA (Typ)
• Package: SOT-23-5
• Operating Temperature Range: -40°C to +85°C
• Protection Features: Overcurrent protection, Thermal shutdown

Descriptions:

The R3111N281C-TR is a low-power LDO regulator designed for battery-powered applications. It provides a stable 2.8V output with low dropout voltage and ultra-low quiescent current, making it suitable for portable and IoT devices.

Features:

• Ultra-Low Quiescent Current (1.0μA typical) for extended battery life
• Low Dropout Voltage (160mV @ 100mA)
• High Output Accuracy (±1%)
• Built-in Protection Circuits (Overcurrent, Thermal shutdown)
• Small Package (SOT-23-5) for space-constrained designs
• Low ESR Capacitor Compatible (1.0μF or higher)

This regulator is commonly used in wearables, sensors, and battery-operated electronics requiring stable, low-power voltage regulation.

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