AP7343-18W5-7

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

The AP7343-18W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 1.8V 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 (PSRR) of 75dB at 1kHz alongside low output noise of 60µVrms from 10Hz to 100kHz. The device utilizes a CMOS process for low quiescent current consumption of 35µA typ. Packaged in SOT-25, it includes integrated thermal shutdown and current limit protection circuits.

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

• Integrated enable pin allows precise control over regulator activation and shutdown states
• High ripple rejection capability ensures stable performance against input line noise
• Low output noise characteristic supports sensitive RF and communication circuitry
• Built-in thermal shutdown and fold-back short-circuit current protection enhance 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 W5 corresponds to the SOT-25 package configuration required for your PCB layout. Confirm that the non-discharge variant meets system requirements if rapid output voltage decay is not necessary. Ensure input and output capacitor values align with stability guidelines provided in the datasheet application information section.

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

Select this component when a fixed 1.8V rail is needed with minimal footprint constraints. The SOT-25 package offers a compact solution for dense layouts. Consider the 300mA current capacity against peak load demands. Verify that the input voltage remains within the 1.7V to 5.25V operational window under all expected conditions.

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

This part belongs to the AP7343 family of low dropout regulators designed for low-power handheld communication equipment. The series emphasizes high accuracy and low noise. Other variants in the family offer different fixed output voltages ranging from 0.9V to 3.6V and alternative packaging options such as X2-DFN1010-4.

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

AP7343D-18W5-7 serves as a direct substitute featuring built-in output discharge functionality. Verify if the discharge feature is compatible with the target application design before swapping.