AP7353D-29FS4-7

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

The AP7353D-29FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 2.9V with an accuracy of ±1%. The device supports a maximum output current of 250mA and operates within an input voltage range of 2.0V to 5.5V. Key electrical characteristics include a typical quiescent current of 18µA, a ripple rejection ratio of 90dB at 1kHz, and an output noise voltage of 10µVrms from 10Hz to 100kHz. It utilizes the X2-DFN1010-4 package.

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

• Includes an integrated auto-discharge resistor network that activates when the enable pin is pulled low to rapidly discharge the output capacitor.
• Features high power supply ripple rejection (PSRR) and low output noise for stable operation in sensitive analog circuits.
• Incorporates built-in short-circuit protection and thermal shutdown mechanisms to safeguard against overcurrent and overheating conditions.

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

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

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

Verify the specific suffix FS4 corresponds to the X2-DFN1010-4 package type required for your PCB layout. Confirm the 'D' designation indicates the inclusion of the internal output discharge feature, as this affects circuit behavior during shutdown states. Ensure compatibility with RoHS 3 compliance standards if applicable to your manufacturing requirements.

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

Select this component when a fixed 2.9V rail is needed with minimal footprint using the X2-DFN1010-4 package. The internal discharge feature distinguishes it from non-discharge variants, making it suitable for applications requiring fast output voltage decay. Verify that the 250mA load capability meets system peak current demands while maintaining stability with recommended ceramic capacitors.

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

This part belongs to the AP7353 series of low dropout regulators designed for handheld and wearable electronics. The series offers various fixed output voltages ranging from 1.8V to 4.7V. The AP7353D variant specifically adds an auto-discharge function to the standard AP7353 architecture, enhancing power management efficiency in battery-operated systems.

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

AP7353-29FS4-7: Identical specifications but lacks the internal output discharge resistor network.

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

What is the function of the 'D' suffix in the AP7353D-29FS4-7?

The 'D' suffix indicates that the device includes an integrated N-channel auto-discharge resistor. This feature actively pulls down the output voltage when the enable pin is driven low, ensuring rapid discharge of the output capacitor.

How does the AP7353D-29FS4-7 handle short-circuit conditions?

The regulator incorporates short-circuit protection that clamps the output current to approximately 350mA when the output is shorted to ground. Additionally, thermal shutdown circuitry protects the device from damage due to excessive junction temperatures.