AP7343DQ-12W5-7

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

The AP7343DQ-12W5-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed 1.2V output with a guaranteed maximum current of 300mA. The device operates within an input voltage range of 1.7V to 5.25V and features a typical ripple rejection of 75dB at 1kHz. It includes an integrated enable pin for power control and built-in auto-discharge functionality upon shutdown. The component is housed in a compact SOT-25-5 surface-mount package.

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

• Automotive-grade qualification compliant with AEC-Q100 standards
• Integrated enable pin for precise power management control
• Built-in auto-discharge circuitry for rapid output voltage decay
• High ripple rejection ratio suitable for noise-sensitive applications

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

• Infotainment power supplies
• Automotive RF supplies
• Camera modules
• 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 network, which distinguishes this variant from the standard non-discharge version. Confirm that the 'Q' designation aligns with required automotive compliance documentation and PPAP capabilities. Ensure the W5 package code matches the intended PCB footprint requirements before finalizing procurement orders.

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

Select this component when designing for automotive environments requiring strict voltage accuracy and low noise profiles. The integrated discharge feature simplifies system reset timing compared to external discharge solutions. Verify that the input voltage remains within the specified operational limits to maintain stability. Consider the thermal dissipation characteristics inherent to the SOT-25 package under maximum load conditions.

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

This part belongs to the AP7343Q family of low dropout regulators designed specifically for automotive electronics. The series offers various fixed output voltages and packaging options to accommodate diverse layout constraints. The DQ suffix denotes the combination of automotive qualification and the specific discharge configuration, ensuring compatibility with rigorous industry reliability standards.

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

AP7343Q-12W5-7

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

What is the function of the EN pin on the AP7343DQ-12W5-7?

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

How does the AP7343DQ-12W5-7 handle output voltage after being disabled?

Due to the 'D' suffix in the part number, this variant includes an internal auto-discharge resistor. When the enable pin is pulled low, this resistor actively discharges the output capacitor to rapidly reduce the output voltage.