AP7350D-28CF4-7

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

The AP7350D-28CF4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a stable 2.8V output with an accuracy of ±1% at +25°C and ±2% across the operating temperature range. The device supports a guaranteed output current of 150mA and operates within an input voltage range of 2.0V to 5.25V. Quiescent current is as low as 0.25µA, with standby current reaching 0.02µA when the enable pin is pulled low. The maximum dropout voltage at 150mA load is 0.40V. It utilizes an X2-WLB0606-4 wafer level chip scale package.

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

• Integrated active discharge circuitry for rapid output voltage decay upon shutdown
• Ultra-low quiescent and standby currents designed for extended battery life in portable devices
• High ESD protection exceeding 4000V Human Body Model and 400V Machine Model standards
• Compact X2-WLB0606-4 footprint optimized for space-constrained PCB layouts

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 and image sensor power supplies

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

Verify that the specific part number suffix 'D' corresponds to the version with built-in output discharge, as this differs from the non-discharge variant. Confirm the package type matches the required X2-WLB0606-4 dimensions for your PCB layout. Ensure EN pin drive signals meet the specified high and low voltage thresholds for reliable operation.

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

Select this component when a fixed 2.8V rail is required with minimal board space. The integrated discharge feature distinguishes it from standard versions, ensuring faster power-down times. Verify that the input voltage remains within the 2.0V to 5.25V range under all operating conditions to maintain stability and prevent damage.

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

This component belongs to the AP7350 series of ultra-low quiescent current LDOs. The 'D' suffix indicates the inclusion of an internal active discharge resistor connected between VOUT and GND. This feature allows the output capacitor to discharge rapidly when the device is disabled, which is critical for systems requiring quick power cycling or strict standby current limits.

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

AP7350-28CF4-7

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

What is the function of the 'D' suffix in the AP7350D-28CF4-7?

The 'D' suffix indicates that the device includes an internal active discharge resistor. When the enable pin is pulled low, this resistor actively discharges the output capacitor to ensure the output voltage drops quickly.

How should the Enable (EN) pin be handled if shutdown control is not needed?

If shutdown control is not required, the EN pin should be tied directly to the VIN pin to keep the regulator output enabled continuously. Leaving the EN pin floating is not recommended.