AP7343DQ-11W5-7

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

The AP7343DQ-11W5-7 is an automotive-compliant low dropout regulator manufactured by Diodes Incorporated. It provides a fixed output voltage of 1.1 V with a guaranteed maximum output current of 300 mA. The device operates within an input voltage range of 1.7 V to 5.25 V and supports an ambient temperature range from -40°C to +125°C. Key electrical characteristics include a quiescent current of 35 µA, ripple rejection of 75 dB at 1 kHz, and output noise of 60 µVrms. 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 N-channel auto-discharge circuit for rapid output voltage decay
• High power supply ripple rejection and low output noise performance
• Fixed output voltage accuracy of ±1% across the operating temperature range

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 suffix matches the required package type and discharge functionality. Confirm compliance requirements such as RoHS and halogen-free status if mandated by the design specification. Ensure the ordering quantity aligns with standard tape and reel packaging quantities provided by the manufacturer.

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

Select this component when high PSRR and low noise are critical for sensitive automotive loads. The DQ variant is specifically chosen over the Q variant when an internal discharge resistor is required to pull down the output voltage upon shutdown. Verify that the input voltage remains within the specified operational limits during all transient conditions.

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

This device belongs to the AP7343Q family of low dropout regulators designed for automotive environments. It utilizes a CMOS process to achieve low power consumption while maintaining high precision. The family includes variants with and without output discharge capabilities, offering flexibility for different system power management strategies.

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

Direct functional substitutes within the same series include AP7343Q-11W5-7, which lacks the internal discharge feature. Other package options such as W-DFN2020-6 (SWP) Type A1 or UXD provide alternative footprint solutions while maintaining identical electrical specifications.

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

What is the function of the 'D' suffix in the AP7343DQ-11W5-7 part number?

The 'D' indicates that the regulator includes an integrated N-channel auto-discharge resistor connected between the output and ground. This allows the output voltage to decay rapidly when the enable pin is pulled low.

How does the AP7343DQ-11W5-7 handle short-circuit conditions?

The device incorporates foldback short-circuit protection. When the output is shorted to ground, the output current is clamped to approximately 60 mA to prevent damage to the regulator.