R1161N331D-TR-FE

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The R1161N331D-TR-FE is a fixed positive low-dropout (LDO) voltage regulator manufactured by Nisshinbo Micro Devices, formerly Ricoh Electronic Devices. It provides a fixed output voltage of 3.3V with a maximum continuous output current of 300mA. The device features a typical dropout voltage of 230mV at full load and offers high power supply rejection ratio (PSRR) of 65dB. It operates within an input voltage range of 1.4V to 6V and supports surface-mount installation in a compact SOT-23-5 package. The component is designed for efficient power management in portable electronics.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Manual ECO mode shift capability for optimized power consumption
• High output voltage accuracy with low supply current
• Integrated chip enable function for standby control
• Built-in current limit circuit for overcurrent protection

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Portable electronic devices requiring stable 3.3V power rails
• Battery-powered systems utilizing manual eco mode for extended runtime
• Embedded circuits needing low dropout performance under varying loads

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the manufacturer designation as Nisshinbo Micro Devices Inc., which acquired Ricoh's semiconductor business. Confirm the specific suffix TR-FE indicates tape and reel packaging compliance. Ensure the part number matches the exact 3.3V output variant. Check RoHS compliance status against current regulatory requirements. Validate the SOT-23-5 package dimensions for PCB footprint compatibility.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this regulator when a fixed 3.3V output is required with moderate current demands up to 300mA. Consider the low dropout characteristic for applications with limited input voltage headroom. The manual ECO mode feature makes it suitable for battery-operated devices where power efficiency is critical. Ensure the operating temperature range meets the environmental conditions of the target application.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the R1161x series of CMOS-based LDO regulators. The series is characterized by high output voltage accuracy and low ON-resistance. It integrates a voltage reference unit, error amplifier, and resistors for setting the output voltage. The design includes protection circuits against overcurrent and thermal runaway, ensuring reliable operation in various consumer and industrial applications.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include other parts from the same R1161x family with compatible pinouts and electrical characteristics. Verify that alternative components support the same 300mA output current and 3.3V fixed output. Ensure replacement parts maintain the SOT-23-5 package form factor for direct board replacement.