AP7343-32FS4-7B

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

The AP7343-32FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 3.2V 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. The device utilizes X2-DFN1010-4 (Type B) packaging for compact surface-mount applications. Key electrical characteristics include a quiescent current of 35µA, output voltage accuracy of ±1%, and a typical dropout voltage of 220mV at full load.

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

• Integrated enable pin allows for precise power management control and shutdown capabilities
• High ripple rejection performance ensures clean power delivery in noise-sensitive environments
• Low output noise characteristic supports sensitive RF and communication circuitry
• Built-in thermal shutdown and current limit protection enhance operational reliability

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

• Smart phones and tablets
• RF supplies
• Cameras
• Portable videos
• Wireless adapters

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

Verify the specific suffix FS4-7B corresponds to the required X2-DFN1010-4 package and tape-and-reel quantity. Confirm that the non-discharge variant meets system requirements, as discharge versions exist under different part numbers. Ensure compatibility with RoHS 3 standards if environmental compliance is mandatory for the target market.

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

Select this component when a fixed 3.2V rail is needed with minimal footprint constraints. The high PSRR makes it suitable for powering RF sections where noise immunity is critical. Consider the 300mA current limit against peak load demands. Verify that the input voltage remains above the dropout threshold across all operating conditions to maintain regulation stability.

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

This device belongs to the AP7343 family of low dropout regulators designed for handheld communication equipment. The series offers various fixed output voltages ranging from 0.9V to 3.6V. It is based on a CMOS process, providing low power consumption and fast transient response. The family includes automotive-compliant variants under the AP7343Q designation.

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

AP7343D-32FS4-7B provides identical electrical specifications but includes an internal output discharge feature upon shutdown.