RP173K121D-TR

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

The RP173K121D-TR is a fixed-output low-dropout linear regulator from the RP173x series, manufactured by Nisshinbo Micro Devices. It provides a nominal output voltage of 1.2 V with a maximum continuous output current of 150 mA. The device operates within an input voltage range of 2.5 V to 11 V and features a typical supply current of 2.0 µA. It is housed in a DFN(PL)1010-4 surface-mount package.

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

• Integrated reverse current protection circuit prevents leakage when output voltage exceeds input voltage.
• Built-in chip enable control allows switching between active operation and ultra-low standby current modes.
• Designed for stable performance with external capacitors of 0.1 µF or greater.
• Includes short-circuit current limiting and peak current limit circuits for system protection.

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

• Power source for portable communication equipment
• Power source for battery-powered devices
• Power source for digital home appliances

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

Verify the specific suffix 'D' indicates the presence of an auto-discharge function at the off state. Confirm the package type matches the design requirements for the DFN(PL)1010-4 footprint. Ensure the CE pin configuration aligns with the system's control logic for enabling and disabling the regulator.

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

Select this component for applications requiring low quiescent current and high efficiency under light loads. The 1.2 V output is suitable for powering digital logic or microcontrollers. Consider the dropout voltage characteristics relative to the minimum input voltage provided by the power source.

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

This part belongs to the RP173x series of LDO regulators designed for portable electronics. The series offers various output voltages and package options, including SOT-23-5 and SC-88A. The RP173K variant specifically utilizes the compact DFN(PL)1010-4 package for high-density mounting.

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

RP173K121B-TR

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

What is the function of the auto-discharge feature in the RP173K121D-TR?

The auto-discharge function quickly lowers the output voltage to 0 V when the chip enable signal switches from active to standby mode by releasing charge accumulated in the external capacitor.

How does the reverse current protection circuit operate?

It stops reverse current flow from the output to the input or ground when the output voltage becomes higher than the input voltage, maintaining leakage current below specified limits.