AP7343-33FS4-7B

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

The AP7343-33FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 3.3V output with a maximum 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 and low output noise of 60µVrms from 10Hz to 100kHz. The device utilizes X2-DFN1010-4 (Type B) packaging and includes an enable pin for power control. Quiescent current is typically 35µA, with standby current as low as 0.01µA. It supports an operating ambient temperature range of -40°C to +85°C.

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

• Integrated enable pin allows precise on/off control of the regulator output.
• Built-in short-circuit protection clamps output current during fault conditions.
• CMOS process ensures low quiescent current and efficient operation.
• High ripple rejection capability minimizes noise impact on sensitive circuits.

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

• Smart phones and tablets
• RF supplies
• Cameras
• Portable videos
• Wireless communication devices

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

Verify the specific suffix FS4-7B corresponds to the X2-DFN1010-4 package and tape-and-reel packing configuration. Confirm RoHS compliance status and ensure the ordering code matches the required non-discharge variant. Cross-reference datasheet revision DS37952 Rev. 14 for accurate electrical specifications before finalizing procurement.

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

Select this component when a compact footprint is required alongside high PSRR performance. The 300mA output current suits moderate load applications. Ensure input voltage remains within the 1.7V to 5.25V range. Consider thermal resistance values for PCB layout planning to maintain junction temperature within safe limits under maximum load conditions.

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

This part belongs to the AP7343 family of low dropout regulators designed for portable electronics. It shares core architecture with other variants in the series but differs in output voltage and packaging. The FS4-7B designation specifically indicates the X2-DFN1010-4 Type B package with standard tape-and-reel delivery.

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

AP7343D-33FS4-7B offers the same electrical characteristics but includes an internal discharge resistor for faster output voltage decay upon shutdown. Verify if active discharge functionality is required for the specific application design.