AP7343DQ-18FDUW-7

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

The AP7343DQ-18FDUW-7 is a fixed-output low dropout (LDO) voltage regulator manufactured by Diodes Incorporated. It provides a stable 1.8 V output with a maximum load current of 300 mA. The device operates within an input voltage range of 1.7 V to 5.25 V and features a typical power supply rejection ratio (PSRR) of 75 dB at 1 kHz. Quiescent current is specified at 35 uA, with a maximum dropout voltage of 310 mV at full load. Output voltage accuracy is maintained within ±1%. The component supports operation across a temperature range of -40°C to +125°C and includes internal protection against overcurrent and thermal overload.

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

• High power supply rejection ratio for effective noise suppression in sensitive circuits
• Low quiescent current consumption suitable for battery-powered applications
• Integrated enable pin for precise power management control
• Compact surface-mount packaging facilitating dense PCB layouts

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

• Portable handheld communication equipment
• Battery-operated consumer electronics
• Noise-sensitive analog signal processing stages
• Embedded systems requiring stable low-voltage rails

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

Verify the specific suffix FDUW corresponds to the WDFN2020-6 package configuration as defined in the official datasheet. Confirm RoHS compliance status and automotive qualification requirements if applicable to your design. Ensure ordering quantities align with standard reel sizes. Cross-reference the manufacturer part number directly with Diodes Incorporated documentation to validate availability and lead times before finalizing procurement plans.

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

Select this regulator when a fixed 1.8 V rail is required with high PSRR characteristics. The 300 mA output capability supports moderate load demands while maintaining low noise performance. Consider the wide input voltage range for compatibility with single-cell lithium batteries or unregulated sources. Verify that the thermal dissipation capabilities of the chosen package meet the system's power budget under worst-case operating conditions.

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

This component belongs to the AP7343 series of low dropout regulators designed for low-power applications. The series emphasizes high accuracy and low noise, making it suitable for portable devices. The DQ variant indicates automotive-grade qualification standards. The specific model integrates essential protection features within a small footprint, supporting modern miniaturization trends in electronic design.

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

Compatible substitutes include other 300 mA LDOs from Diodes Incorporated such as the AP7340 series for lower current needs or the AP7344 for dual-channel requirements. Verify pinout compatibility and electrical specifications before substitution. Ensure replacement parts maintain the same package type and thermal characteristics to avoid redesigning the PCB layout.