RP102K281D-TR

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

The RP102K281D-TR is a CMOS-based low noise LDO regulator from the RP102x series, manufactured by Nisshinbo Micro Devices Inc. It provides a fixed output voltage of 2.8V with an accuracy of ±0.8%. The device supports a maximum output current of 300mA and operates within an input voltage range of 1.7V to 5.25V. Key electrical characteristics include a typical dropout voltage of 0.12V at full load, a supply current of 50µA, and a ripple rejection ratio of 80dB at 1kHz. It features a chip enable function and built-in fold-back protection circuitry.

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

• High output voltage accuracy with a tolerance of ±0.8% across operating conditions.
• Integrated chip enable (CE) pin for power management and standby control.
• Built-in fold-back protection circuit to limit short-circuit current.
• Low dropout voltage performance suitable for battery-powered applications.

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

• Power source for portable communication equipment.
• Power source for electrical appliances such as cameras, VCRs, and camcorders.
• Power source for general battery-powered equipment.

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 and high-active chip enable logic. Confirm the package type matches DFN(PL)1820-6 and that the reel quantity corresponds to 5,000 pieces per manufacturer standard packaging. Ensure RoHS compliance requirements are met for the target assembly process.

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

Select this component when a fixed 2.8V rail is required with moderate current demands up to 300mA. The DFN(PL)1820-6 package offers high-density mounting capabilities. Consider the 50µA supply current for battery life optimization. Verify that external ceramic capacitors of 1.0µF or more are used for stability, as phase compensation relies on capacitor ESR characteristics.

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

This part belongs to the RP102x Series, which includes variants in WLCSP-4-P2, SOT-23-5, and DFN(PL)1820-6 packages. The 'K' designation specifies the DFN(PL)1820-6 package form factor. The '281' code sets the output voltage to 2.8V. Other series members share similar electrical architectures but differ in package dimensions and specific output voltage options ranging from 1.2V to 3.3V.

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

Direct substitutes within the same family include RP102K281B-TR, which lacks the auto discharge function. Cross-series replacements like RP114K or RP123K offer different current ratings or noise profiles and require schematic verification for compatibility.

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

What is the function of the 'D' suffix in the part number?

The 'D' suffix indicates that the IC includes an auto discharge function at the off state and utilizes a high-active ('H') Chip Enable (CE) pin polarity.

What external components are recommended for stable operation?

Ceramic capacitors with a capacitance of 1.0µF or more are recommended for both the input (CIN) and output (COUT) pins to ensure phase compensation and stability.