AP7343D-34W5-7

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

The AP7343D-34W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 3.4V with a maximum guaranteed output current of 300mA. The device operates within an input voltage range of 1.7V to 5.25V and features a typical ripple rejection ratio of 75dB at 1kHz. Quiescent current is specified as low as 35µA, while standby current reaches 1.0µA maximum. The component utilizes an SOT-25 surface-mount package and includes integrated thermal shutdown and short-circuit protection circuits.

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

• Integrated enable pin for power control and shutdown mode
• Built-in auto-discharge circuit to rapidly reduce output voltage when disabled
• High power supply ripple rejection capability for noise-sensitive applications
• Low output noise performance suitable for RF signal supplies

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

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

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 'W5' designation corresponds to the SOT-25 package type required for your PCB layout. Ensure the ordering code matches the exact 3.4V output specification needed for the target application design.

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

Select this variant when a rapid output voltage decay is required upon disabling the regulator. The SOT-25 package offers a compact footprint for dense layouts. Consider the 300mA current limit and 5.25V maximum input voltage when designing the power stage. Verify that the 3.4V fixed output aligns with the load requirements without excessive dropout voltage.

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

This component belongs to the AP7343 series of CMOS low dropout regulators designed for handheld communication equipment. The series emphasizes low power consumption and high accuracy. The AP7343D-34W5-7 specifically integrates the discharge function, differentiating it from standard AP7343 models which lack this feature.

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

AP7343-34W5-7 serves as the direct non-discharge equivalent within the same package.