AP2127K-2.5TRG1

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

The AP2127K-2.5TRG1 is a positive fixed-output CMOS LDO regulator from Diodes Incorporated, providing a stable 2.5V output with a maximum current of 300mA. It operates within an input voltage range of 2.5V to 6V and maintains high accuracy of ±2%. The device features low quiescent current (60µA typical), low dropout voltage (170mV at 300mA for 3.3V versions, similar performance for 2.5V), and excellent ripple rejection (68dB at 1kHz). Packaged in SOT-23-5, it includes short-circuit protection, over-temperature shutdown, and auto-discharge functionality.

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

• High output voltage accuracy of ±2% ensures precise power delivery.
• Low noise operation with 60µVRMS output noise for sensitive applications.
• Integrated thermal and short-circuit protection safeguards against overload conditions.
• Auto-discharge feature rapidly drains output capacitance when disabled.

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

• Datacom equipment
• Notebook computers
• Motherboard power regulation

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

Verify the specific ordering suffix 'K' corresponds to the SOT-23-5 package and 'TR' indicates tape and reel packaging. Confirm RoHS compliance and green status requirements match project specifications. Ensure input capacitors are low ESR ceramic types (X7R or X5R) as recommended for stability. Check for any recent PCN updates regarding assembly sites or material changes before finalizing procurement.

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

Select this component when a fixed 2.5V rail is required with minimal external components. It is suitable for battery-powered devices due to low standby current. Consider the dropout voltage characteristics relative to the minimum input voltage. Verify that the load transient response meets system requirements using only 1µF ceramic capacitors. Evaluate thermal dissipation based on the expected junction-to-ambient resistance in the target PCB layout.

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

This part belongs to the AP2127 series of high-speed, extremely low-noise CMOS LDO regulators. The series offers various fixed voltage options ranging from 1.0V to 4.75V, as well as adjustable versions. It is designed for applications requiring high line/load regulation and low current consumption. The K suffix specifically denotes the SOT-23-5 package variant, which includes a shutdown pin for power control.

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

Direct substitutes must match the 2.5V fixed output, 300mA current capability, and SOT-23-5 package. Verify equivalent electrical parameters such as dropout voltage, quiescent current, and PSRR. Ensure the replacement supports the same operating temperature range (-40°C to +85°C) and includes similar protection features like thermal shutdown and short-circuit limiting.