AP7343D-295W5-7

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

The AP7343D-295W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 2.95 V with a guaranteed maximum load current of 300 mA. It operates within an input voltage range of 1.7 V to 5.25 V and features high power supply rejection ratio performance of 75 dB at 1 kHz alongside low output noise of 60 µVrms from 10 Hz to 100 kHz. The device incorporates an enable pin for power control and includes built-in short-circuit protection and thermal shutdown mechanisms. Packaged in the SOT-25-5 surface-mount configuration, it maintains a quiescent current as low as 35 µA and supports operation across an ambient temperature range of -40 °C to +85 °C.

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

• Integrated N-channel auto-discharge circuitry that actively pulls the output voltage to ground when the enable signal is deactivated.
• High ripple rejection capability combined with ultra-low output noise characteristics suitable for sensitive RF applications.
• Built-in thermal shutdown and fold-back current limiting circuits to protect the device during overload or overheating conditions.

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

• RF power supplies
• Smart phones and tablets
• Portable media players

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

Verify the specific suffix 'D' indicates the inclusion of the internal output discharge feature, distinguishing it from standard variants without this function. Confirm the 'W5' designation corresponds to the SOT-25 package type required for your PCB layout constraints. Ensure the ordering code matches the exact 2.95 V output specification to avoid functional mismatches in the final design.

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

Select this component when a fixed 2.95 V rail is required with active output discharge capabilities for rapid system shutdown. The SOT-25 package offers a compact footprint ideal for space-constrained portable electronics. Consider the 300 mA continuous current rating against peak load demands while accounting for thermal dissipation limits inherent to the small outline transistor package.

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

This part belongs to the AP7343 series of CMOS low dropout regulators designed for low-power handheld communication equipment. The series provides various fixed output voltages ranging from 0.9 V to 3.6 V. The 'D' variant specifically adds the auto-discharge feature, while the 'Q' suffix denotes automotive-grade qualification under AEC-Q100 standards, which this commercial version does not possess.

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

AP7343-295W5-7 serves as the non-discharge equivalent within the same family. For automotive applications requiring similar electrical specifications but with extended reliability standards, the AP7343Q-29W5-7 is the qualified alternative.