AP7343-30FS4-7B

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

The AP7343-30FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 3.0V output with a guaranteed maximum load current of 300mA. It operates within an input voltage range of 1.7V to 5.25V and features high power supply rejection ratio performance of 75dB at 1kHz alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates a CMOS process architecture with integrated thermal shutdown and current limit protection circuits. It utilizes the X2-DFN1010-4 (Type B) surface-mount package for compact PCB integration.

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

• Integrated enable control pin allows precise power management and system shutdown capabilities
• High ripple rejection ratio ensures clean power delivery in sensitive RF applications
• Low quiescent current consumption optimizes battery life in portable devices
• Built-in short-circuit and thermal protection safeguards against overload conditions

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

• Smart phones and tablets
• RF power supplies
• Portable video equipment
• Wireless communication adapters

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

Verify the specific ordering suffix FS4-7B corresponds to the required X2-DFN1010-4 Type B package configuration and tape-and-reel quantity. Confirm that the non-discharge variant meets the application's power-down requirements, as discharge versions exist within the same family. Ensure compliance with RoHS and halogen-free specifications if environmental regulations apply to the final assembly.

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

Select this component when a fixed 3.0V rail is required with minimal footprint constraints. The absence of an internal auto-discharge resistor distinguishes it from the 'D' suffix variants, making it suitable for applications where output voltage retention during shutdown is necessary. Evaluate thermal resistance characteristics relative to the expected ambient temperature and copper area available on the PCB layout.

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

This part belongs to the AP7343 series of low dropout regulators designed for low-power handheld communication equipment. The series offers various fixed output voltages ranging from 0.9V to 3.6V across different package options including SOT25. The AP7343-30FS4-7B specifically targets designs requiring a 3.0V output in a highly compact surface-mount form factor.

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

AP7343-30FS4-7A serves as a direct functional substitute with identical electrical characteristics but potentially different identification codes or manufacturing lots. AP7343D-30FS4-7B provides similar regulation but includes an internal auto-discharge feature for faster output voltage decay upon shutdown.