AP7343D-22FS4-7B

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

The AP7343D-22FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 2.2V with a maximum guaranteed output 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 and includes internal protections such as thermal shutdown and fold-back short-circuit current limiting. Packaged in the compact X2-DFN1010-4 (Type B) format, it supports surface-mount assembly.

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

• Integrated enable pin allows precise on/off control of the regulator output
• Built-in discharge circuit ensures rapid output voltage decay when disabled
• High ripple rejection capability minimizes noise impact from input sources
• Low quiescent current consumption extends battery life in portable applications

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

• RF power supply circuits
• Portable video equipment
• Wireless communication modules
• Camera systems

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

Verify the specific suffix 'D' indicates the inclusion of the auto-discharge feature, which distinguishes this variant from non-discharge versions. Confirm the package code 'FS4' corresponds to the X2-DFN1010-4 (Type B) footprint. Ensure the ordering suffix '7B' matches the required tape and reel quantity specifications for your manufacturing line.

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

Select this component when a stable 2.2V rail is required with minimal board space due to the small DFN package. The integrated discharge function is critical if fast output settling times are needed during power-down sequences. Verify that the input voltage remains above the minimum threshold while accounting for dropout voltage under full load conditions.

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. The 'D' designation specifically denotes the version with an internal N-channel auto-discharge resistor connected to the output.

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

AP7343-22FS4-7B serves as a direct functional substitute but lacks the built-in output discharge feature found in the AP7343D variant.