AP7343D-11W5-7

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

The AP7343D-11W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing an output voltage of 1.1V with a maximum continuous current of 300mA. It operates within an input voltage range of 1.7V to 5.25V and features a typical ripple rejection ratio of 75dB at 1kHz. The device incorporates an integrated discharge function for rapid output voltage decay upon shutdown. Packaged in the SOT-25-5 surface-mount configuration, it supports an operating ambient temperature range from -40°C to +85°C.

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

• Integrated N-channel auto-discharge resistor rapidly removes charge from the output capacitor when disabled
• High power supply ripple rejection capability ensures stable operation under noisy conditions
• Low quiescent current consumption extends battery life in portable applications
• Built-in thermal shutdown and fold-back current limit protect against overheating and short circuits

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

• RF power supplies
• Portable media players
• Wireless communication devices
• Smartphones and tablets

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

Verify that the specific part number suffix 'D' corresponds to the version with the integrated output discharge feature, as non-discharge variants exist within the same family. Confirm the package type matches the required PCB footprint. Ensure compliance with RoHS and halogen-free requirements if mandated by the target application standards.

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

Select this component when a fixed 1.1V rail is required with high ripple rejection and fast shutdown discharge capabilities. Consider the SOT-25 package size constraints and verify that the input voltage remains above the minimum threshold plus dropout voltage during all load conditions. Evaluate thermal dissipation requirements based on the expected power loss at maximum load currents.

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

This component belongs to the AP7343 series of CMOS low-dropout regulators designed for low-power handheld equipment. The series offers various fixed output voltages ranging from 0.9V to 3.6V. The 'D' suffix indicates the inclusion of an output discharge circuit, while the 'W5' suffix denotes the SOT-25 package option.

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

AP7343-11W5-7 (Non-discharge variant)

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

What is the function of the 'D' suffix in the part number?

The 'D' suffix indicates that the regulator includes an integrated N-channel auto-discharge resistor to rapidly pull down the output voltage when the enable pin is low.

How does the device handle short-circuit conditions?

The AP7343D-11W5-7 features fold-back current limiting that clamps the output current to approximately 60mA when the output is shorted to ground, protecting the device from damage.