AP7347D-50W5-7

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

The AP7347D-50W5-7 is a fixed-output low-dropout regulator manufactured by Diodes Incorporated, providing a stable 5.0V output with a guaranteed maximum load current of 500mA. It operates within an input voltage range of 1.7V to 5.5V and features high power supply rejection ratio (PSRR) of 75dB at 1kHz alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates an enable pin for power control, thermal shutdown protection, and short-circuit current limiting. It is housed in a compact SOT25-5 surface-mount package.

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

• Integrated enable pin allows precise power management by switching the regulator on or off via logic-level signals.
• High ripple rejection capability ensures clean power delivery even when input voltage contains significant AC noise components.
• Built-in thermal shutdown and foldback short-circuit protection mechanisms safeguard the component against overheating and overcurrent conditions.

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

• Noise-sensitive automotive electronic equipment
• Portable and battery-powered consumer devices
• Desktops, notebooks, and ultrabook systems
• Tablets and remote control units

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

Verify that the specific part number matches the required output voltage and package type before ordering. Confirm compliance with RoHS and halogen-free standards if environmental regulations apply to your manufacturing process. Ensure the supplier provides original manufacturer documentation to validate authenticity and traceability.

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

Select this component when a fixed 5.0V rail is needed with minimal footprint constraints. Consider the 500mA current limit and 1.7V minimum input voltage to ensure adequate headroom. Evaluate the need for the enable feature versus tying the pin directly to the input voltage for continuous operation.

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

This component belongs to the AP7347D series of low-noise LDO regulators designed for high performance in space-constrained applications. The series offers various fixed output voltages and utilizes CMOS technology to achieve low quiescent current consumption while maintaining high accuracy and stability across wide operating temperature ranges.

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

The automotive-compliant variant AP7347DQ shares identical electrical specifications but meets stricter quality standards. Verify pin compatibility and thermal characteristics when substituting other LDOs, as dropout voltage and PSRR values may differ significantly between manufacturers.

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

How does the enable pin function?

Driving the EN pin high activates the regulator, while pulling it low places the device into shutdown mode. If unused, the pin should be tied to VIN to maintain constant output.

What is the purpose of the NC pin?

The NC pin is internally unconnected. It is recommended to connect it to ground on the PCB to maximize copper area for improved thermal dissipation.