AP7343D-30FS4-7B

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

The AP7343D-30FS4-7B is a fixed-output low dropout regulator providing a nominal 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. The device incorporates an enable pin for power control, internal discharge circuitry for rapid output voltage decay upon shutdown, and comprehensive protection against overcurrent and thermal overload. It is housed in an X2-DFN1010-4 (Type B) package.

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

• Integrated resistor network provides precise fixed output voltage options across the series.
• Built-in auto-discharge mechanism ensures rapid output voltage decay when disabled.
• CMOS-based architecture delivers low quiescent current and minimal output noise.
• Includes integrated short-circuit and thermal shutdown protection circuits.

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

• RF power supply stages
• Portable video equipment
• Wireless communication modules

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

Verify the specific suffix 'D' indicates the inclusion of the output discharge feature, distinguishing it from non-discharge variants. Confirm the 'FS4' designation corresponds to the X2-DFN1010-4 (Type B) package type required for your PCB footprint. Ensure the ordering code matches the exact 3.0V output requirement, as other voltage codes exist within the same family.

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

Select this component when a compact surface-mount solution is required for low-noise linear regulation. The X2-DFN1010-4 package offers a small footprint suitable for dense layouts. Consider the 300mA current capability and 75dB PSRR for sensitive analog or RF sections. Verify that the input voltage remains above the dropout threshold for the expected load conditions.

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

This part belongs to the AP7343 series of low dropout regulators manufactured by Diodes Incorporated. The series utilizes a CMOS process to achieve high accuracy and low power consumption. The 'D' suffix specifically denotes the version equipped with an output discharge function, while 'FS4' identifies the specific four-pin DFN package configuration used in this ordering code.

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

AP7343-30FS4-7B is the non-discharge equivalent within the same package. AP7343DQ-30W5-7 is an automotive-grade alternative in a different SOT25 package. Cross-referencing requires verifying the presence or absence of the discharge feature and ensuring package compatibility.