AP7350D-33CF4-7

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

The AP7350D-33CF4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a stable 3.3V output with a guaranteed maximum current of 150mA. The device operates within an input voltage range of 2.0V to 5.25V and features an ultra-low quiescent current of 0.25µA, dropping to 0.02µA in standby mode. It incorporates an integrated enable pin for power control and includes built-in output discharge functionality. The component is housed in an X2-WLB0606-4 wafer level chip scale package.

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

• Ultra-low quiescent current consumption designed to extend battery life in portable applications
• Integrated enable pin allows precise power management and shutdown control
• Built-in active output discharge ensures rapid voltage decay when disabled
• Miniature wafer level chip scale package minimizes printed circuit board footprint

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

• Wearable electronics
• Sensor modules for Internet-of-Things (IoT)
• Wireless communication modules
• Battery-operated devices
• Camera systems

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

Verify the specific suffix 'D' indicates the presence of the internal output discharge feature, as the base AP7350 lacks this function. Confirm the 'CF4' designation corresponds to the X2-WLB0606-4 package type. Ensure compatibility with RoHS 3 and halogen-free manufacturing standards required for your assembly process. Cross-reference the datasheet revision to confirm electrical characteristics match your design requirements.

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

Select this component when minimizing PCB area is critical due to its wafer level packaging. Choose this part over standard LDOs if ultra-low static current is necessary to maximize battery longevity in intermittent use scenarios. The inclusion of the enable pin makes it suitable for systems requiring dynamic power sequencing or deep sleep modes. Verify that the 150mA output capability meets the peak load demands of the target application.

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

This regulator belongs to the AP7350 series from Diodes Incorporated, which focuses on ultra-low power performance. The series utilizes CMOS technology to achieve minimal ground current while maintaining high output voltage accuracy. The AP7350D variant specifically adds an active discharge resistor to pull the output voltage down quickly upon disablement, distinguishing it from the non-discharge version.

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

AP7350-33CF4-7 serves as a direct functional substitute if the active output discharge feature is not required in the design.

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

What is the difference between AP7350 and AP7350D?

The AP7350D includes an internal active output discharge resistor that pulls the output voltage to ground when the enable pin is low. The standard AP7350 does not have this discharge feature.

How should the EN pin be handled if always-on operation is desired?

To keep the regulator output on continuously, the EN pin should be tied directly to the VIN pin. It must not be left floating to ensure proper operation.