AP7343DQ-15W5-7

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

The AP7343DQ-15W5-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 1.5V output with a guaranteed current capability of 300mA. The device operates within an input voltage range of 1.7V to 5.25V and supports an ambient temperature range from -40°C to +125°C. Key electrical specifications include a quiescent current of 35µA, ripple rejection of 75dB at 1kHz, and output noise of 60µVrms. It features integrated thermal shutdown, current limit protection, and an enable pin for power control.

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

• Automotive compliant with AEC-Q100 qualification and PPAP capability
• Integrated auto-discharge circuit for rapid output voltage decay upon shutdown
• High power supply ripple rejection ratio for noise-sensitive applications
• Low output noise voltage suitable for RF and precision circuits

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

• Infotainment power supplies
• Automotive RF supplies
• Cameras
• Automotive POL in ADAS
• Automotive wireless communications

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

Verify the specific suffix 'D' indicates the inclusion of the internal discharge resistor, distinguishing it from the standard non-discharge variant. Confirm the 'Q' suffix denotes automotive compliance status. Ensure the 'W5' package code matches the required SOT25 footprint for PCB layout compatibility. Validate RoHS and halogen-free material declarations against project requirements.

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

Select this component when an enable function and automatic output discharge are required for system power management. The high PSRR makes it appropriate for powering sensitive analog or RF loads directly from noisy automotive buses. Verify that the 300mA load current does not exceed the thermal dissipation limits defined by the SOT25 package and board copper area.

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

This part belongs to the AP7343Q family of CMOS LDOs designed for automotive environments. It shares core electrical characteristics with other variants in the series but is distinguished by its specific 1.5V fixed output voltage and the inclusion of the auto-discharge feature. The family offers various output voltages and package options to support diverse design constraints.

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

AP7343Q-15W5-7 (Non-discharge version)

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

What is the function of the EN pin?

The Enable pin controls the regulator state; driving it high turns the device on, while pulling it low activates shutdown mode.

How does the DQ suffix differ from Q?

The 'D' in the suffix indicates the presence of an internal N-channel auto-discharge resistor that rapidly bleeds charge from the output capacitor when disabled.