AP7343DQ-30W5-7

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

The AP7343DQ-30W5-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 3.0V output with a guaranteed maximum load current of 300mA. The device 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. It features a low quiescent current of 35µA and includes an integrated enable pin for power control. The component is housed in a compact SOT-25-5 surface-mount package.

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

• Integrated auto-discharge circuitry ensures rapid output voltage decay when the device is disabled
• High power supply ripple rejection capability minimizes noise interference in sensitive circuits
• Automotive qualification supports strict change control requirements and PPAP documentation
• Low output noise performance preserves signal integrity in RF and data transmission applications

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

• Infotainment power supplies
• Automotive RF supplies
• Camera modules
• Point-of-load regulation in ADAS systems
• Automotive wireless communications

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

Verify that the specific part number matches the required automotive compliance standards, including AEC-Q100 Grade 1 qualification and IATF 16949 manufacturing certification. Confirm the presence of the 'D' suffix indicating the built-in discharge feature, as this distinguishes it from non-discharge variants. Ensure the ordering suffix corresponds to the correct SOT-25 packaging format and tape-and-reel quantity specifications.

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

Select this component when designing for noise-sensitive automotive environments requiring precise voltage regulation under varying load conditions. The inclusion of the enable pin allows for system-level power management and standby current reduction. Consider the thermal dissipation characteristics of the SOT-25 package relative to the expected power loss during operation. Verify compatibility with standard ceramic capacitors for stability across the full operating temperature range.

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

This device belongs to the AP7343Q family of low dropout regulators designed specifically for automotive electronics. The series offers various fixed output voltages ranging from 0.9V to 3.6V. The 'DQ' designation indicates automotive-grade qualification combined with the output discharge function, while the 'W5' suffix specifies the SOT-25 package type used for dense PCB layouts.

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

AP7343Q-30W5-7

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

What is the function of the EN pin on the AP7343DQ-30W5-7?

The Enable (EN) pin controls the operational state of the regulator. Driving this pin high activates the output, while pulling it low places the device into shutdown mode.

How does the AP7343DQ-30W5-7 differ from the AP7343Q-30W5-7?

The primary difference is the internal discharge resistor. The AP7343DQ variant includes an auto-discharge feature that rapidly pulls the output voltage down when disabled, whereas the AP7343Q variant lacks this function.

Is the AP7343DQ-30W5-7 suitable for harsh automotive environments?

Yes, the device is qualified to AEC-Q100 Grade 1 standards and is manufactured in IATF 16949 certified facilities, making it suitable for demanding automotive applications.