AP7343D-295FS4-7B

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

The AP7343D-295FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a precise 2.95V output with a maximum continuous current of 300mA. It operates within an input voltage range of 1.7V to 5.25V 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 management, thermal shutdown protection, and fold-back short-circuit current limiting. Packaged in the compact X2-DFN1010-4 (Type B) format, it supports surface-mount assembly and functions reliably across an ambient temperature range of -40°C to +85°C.

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

• Integrated enable control allows active switching between operational and shutdown modes via the EN pin.
• Built-in discharge circuitry automatically bleeds residual charge from the output capacitor when disabled.
• CMOS-based architecture ensures low quiescent current consumption and minimal power loss during operation.

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

• RF power supply circuits
• Portable video devices
• Wireless communication modules

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

Verify that the specific suffix FS4 corresponds to the X2-DFN1010-4 package type required for your PCB footprint. Confirm the 'D' designation indicates the inclusion of the internal auto-discharge feature, as non-discharge variants exist within the same family. Ensure compatibility with RoHS3 and halogen-free manufacturing standards before finalizing procurement orders.

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

Select this component when a stable 2.95V rail is needed for sensitive analog or RF sections requiring low noise performance. The X2-DFN1010-4 package is optimal for designs prioritizing minimal board space utilization. Consider the thermal resistance characteristics if operating near maximum load currents to ensure junction temperatures remain within safe limits.

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

This part belongs to the AP7343 series of 300mA high PSRR low-noise LDOs. It shares core electrical specifications with other voltage variants in the lineup but is distinguished by its fixed 2.95V output setting and specific packaging configuration. The series is designed for portable handheld equipment where efficiency and size are critical constraints.

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

AP7343-295FS4-7B serves as a direct functional substitute lacking the discharge feature. AP7343D-295W5-7 offers identical electrical performance in an SOT25 package for alternative layout requirements.

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 regulator includes an integrated N-channel auto-discharge resistor to rapidly remove charge from the output capacitor when the enable pin is pulled low.

How does the device handle short-circuit conditions?

The AP7343D-295FS4-7B utilizes fold-back short-circuit protection that clamps the output current to approximately 60mA when the output is shorted to ground, preventing overheating.