AP7343D-27W5-7

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

The AP7343D-27W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a 2.7V output with a guaranteed 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 incorporates an enable pin for shutdown control, built-in output discharge, thermal shutdown, and current limit protection. Packaged in SOT-25, it maintains an output voltage accuracy of ±1% and draws a quiescent current as low as 35µA.

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

• Integrated enable pin allows precise on/off control and deep shutdown mode
• Built-in auto-discharge mechanism ensures rapid output voltage decay upon disable
• High ripple rejection capability minimizes power supply noise impact on sensitive loads
• Low output noise profile supports operation in RF and communication circuits

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

• RF power supplies
• Portable video devices
• Wireless adapters
• Smartphones and tablets

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

Verify the specific suffix 'D' indicates the inclusion of the internal output discharge feature, which distinguishes this variant from non-discharge versions. Confirm the 'W5' suffix corresponds to the SOT-25 package type required for your PCB layout. Ensure the ordering code matches the exact 2.7V fixed output requirement. Cross-reference the manufacturer's latest datasheet revision to confirm compliance with current RoHS and halogen-free standards before finalizing procurement.

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

Select this component when a stable 2.7V rail is required for noise-sensitive applications such as RF stages or wireless modules. The integrated discharge feature simplifies system power sequencing by preventing floating outputs. Verify that the input voltage remains above the minimum threshold while accounting for dropout voltage under maximum load conditions. Consider the SOT-25 footprint constraints and thermal dissipation capabilities relative to the expected ambient temperature and power loss.

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

This part belongs to the AP7343 family of CMOS low dropout regulators designed for handheld and portable 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, differentiating it from standard variants without this function. The W5 suffix identifies the compact SOT-25 surface-mount package suitable for dense layouts.

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

AP7343-27W5-7 serves as a direct functional substitute if the output discharge feature is not required in the design.