AP7353D-285FS4-7

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

The AP7353D-285FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 2.85 V with an accuracy of ±1%. The device supports a maximum output current of 250 mA and operates within an input voltage range of 2.0 V to 5.5 V. Key electrical characteristics include a typical quiescent current of 18 µA, a ripple rejection ratio of 90 dB at 1 kHz, and an output noise voltage of 10 µVrms from 10 Hz to 100 kHz. The component utilizes the X2-DFN1010-4 package and includes an integrated enable pin for power control.

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

• Integrates an N-channel auto-discharge resistor to rapidly deplete output voltage when disabled
• Features high power supply ripple rejection and low output noise for sensitive analog circuits
• Includes built-in thermal shutdown and current limit protection mechanisms

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

• RF power supplies
• Smartphones and tablets
• Portable video devices
• Wireless communication equipment

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

Verify that the specific part number suffix FS4 corresponds to the X2-DFN1010-4 package type required for your PCB layout. Confirm the 'D' designation indicates the inclusion of the output discharge feature, as this affects standby behavior. Ensure compatibility with RoHS 3 compliance standards if operating in regulated regions. Cross-reference the datasheet revision to confirm the exact electrical parameters match your design requirements.

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

Select this component when a fixed 2.85 V rail is required with minimal footprint constraints. The X2-DFN1010-4 package offers a smaller surface area compared to the WLB variant. The integrated discharge function makes it suitable for applications requiring fast output voltage decay upon shutdown. Consider the 250 mA current capability against peak load demands to ensure adequate thermal performance without external heatsinking.

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

This device belongs to the AP7353 series of low dropout regulators designed for battery-powered portable electronics. The series emphasizes low noise and high PSRR to support RF and audio applications. The AP7353D variant specifically incorporates an internal discharge path, distinguishing it from the standard AP7353 which lacks this feature. Both variants share similar electrical performance metrics regarding line regulation and transient response.

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

AP7353-285FS4-7 (Non-discharge version)

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

What is the function of the 'D' suffix in the AP7353D-285FS4-7 part number?

The 'D' suffix indicates that the regulator includes an internal N-channel auto-discharge resistor connected to the output. This allows the output voltage to drop rapidly when the enable pin is pulled low.

How does the AP7353D-285FS4-7 handle short-circuit conditions?

The device features short-circuit protection that clamps the output current to approximately 350 mA when the output is shorted to ground, protecting the regulator from overheating damage.