AP7343D-09W5-7

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

The AP7343D-09W5-7 is a CMOS low dropout regulator manufactured by Diodes Incorporated, featuring a fixed 0.9V output voltage and a guaranteed maximum output current of 300mA. It operates within an input voltage range of 1.7V to 5.25V and maintains high accuracy with a typical ripple rejection of 75dB at 1kHz. The device incorporates an enable pin for power control and includes built-in output discharge functionality. Packaged in the compact SOT-25-5 format, it supports surface mount installation and functions reliably 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 resistor that actively pulls down the output voltage when the enable signal is deactivated.
• High power supply ripple rejection capability designed to minimize noise interference in sensitive circuit applications.
• Low quiescent current consumption optimized for extending battery life in portable electronic devices.
• Built-in thermal shutdown and fold-back short-circuit protection mechanisms to safeguard against overheating and overcurrent conditions.

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

• RF power supply circuits
• Smartphones and tablets
• Portable video equipment
• Wireless communication adapters

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 standard versions lacking this function. Confirm the 'W5' package code corresponds to the SOT-25-5 footprint required for your PCB layout. Ensure the ordering quantity aligns with the manufacturer's tape and reel specifications for efficient production integration.

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

Select this component when a stable 0.9V rail is required with minimal board space due to the small SOT-25-5 package. The integrated discharge feature makes it suitable for systems requiring rapid output voltage decay upon shutdown. Consider the 300mA current limit and 75dB ripple rejection when designing for noise-sensitive RF or analog sections of the application.

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

This part belongs to the AP7343 series of low dropout regulators, which are characterized by high precision and low noise performance. The series offers various fixed output voltages and packaging options, including X2-DFN1010-4 and SOT-25. The 'D' designation specifically denotes the version equipped with an auto-discharge function, while 'W5' identifies the SOT-25 package type used in this specific model.

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

AP7343-09W5-7 (Standard version without auto-discharge)

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, which actively pulls the output voltage to ground when the device is disabled.

How does the enable pin operate on this device?

The enable pin controls the state of the regulator; driving it high turns the regulator on, while pulling it low activates the shutdown mode and engages the output discharge feature.