RN5RF15AA-TR-FE

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

The RN5RF15AA-TR-FE is a CMOS-based low ripple voltage regulator IC from the RN5RF series, designed to control external driver transistors. It features high accuracy output voltage of ±2%, typical supply current of 30μA, and standby supply current of 0.1μA. The device provides a typical ripple rejection of 60dB at 1kHz and operates with an input voltage up to 12V. Output voltage is fixed at 1.5V, adjustable in 0.1V steps from 1.2V to 6.0V. It includes short circuit current limiting and chip enable functions for battery conservation.

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

• CMOS process technology enables ultra-low supply current and standby consumption for extended battery life in portable devices.
• Integrated chip enable function allows power management during standby modes.
• Built-in short circuit current limiting circuit protects the external transistor and load.
• High ripple rejection capability suitable for sensitive communication equipment.

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

• Power source for battery-powered equipment
• Power source for hand-held communication equipment
• Power source for cameras and VCRs
• Power source for home appliances

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

Verify the specific part number RN5RF15AA-TR-FE against official Nisshinbo Micro Devices documentation to confirm the 1.5V output voltage setting and 'A' suffix indicating Low-active Chip Enable polarity. Ensure compatibility with external PNP transistors having an hFE between 100 and 300 as specified in the datasheet. Confirm package type SOT-23-5 and reel quantity requirements prior to ordering.

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

Select this component when a fixed 1.5V output is required with low quiescent current. The 'A' designation specifies a Low-active Chip Enable pin, which must be considered for system logic levels. Verify that the external PNP transistor selected meets the recommended hFE range of 100 to 300 to ensure proper current limiting and dropout performance. This IC is optimized for applications requiring high ripple rejection in noisy environments.

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

The RN5RF series consists of CMOS voltage regulators designed for constructing ultra-low dropout regulators using external transistors. These ICs integrate a voltage reference, error amplifier, output voltage setting resistor, current limiter, and chip enable circuit. The series supports output voltages from 1.2V to 6.0V in 0.1V increments, catering to various portable electronic applications requiring stable power supplies.

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

RN5RF15AB-TR-FE (High-active CE), RN5RFxxA-TR-FE (Other voltages)

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

What does the 'A' suffix indicate in the part number RN5RF15AA-TR-FE?

The 'A' suffix indicates that the Chip Enable (CE) pin is active Low.

What is the recommended hFE range for the external PNP transistor?

The datasheet recommends using an external PNP transistor with an hFE between 100 and 300.