AP7353D-30FS4-7

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

The AP7353D-30FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 3.0V 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, ripple rejection of 90dB at 1kHz, and output noise of 10µVrms from 10Hz to 100kHz. It features integrated short-circuit protection, thermal shutdown, and an auto-discharge function upon disable.

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

• Integrated N-channel auto-discharge resistor for rapid output voltage decay when disabled
• High power supply ripple rejection capability across varying load conditions
• Low output noise profile suitable for sensitive analog and RF circuitry
• Built-in enable control pin for system power management and standby modes

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

• RF power supply circuits
• Smartphone and tablet power rails
• Portable video equipment
• Wireless communication modules

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

Verify the specific package type X2-DFN1010-4 matches the design footprint requirements. Confirm that the 'D' suffix indicates the inclusion of the output discharge feature, as this differs from non-discharge variants. Ensure the fixed 3.0V output aligns with the target load voltage specifications before finalizing procurement orders.

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

Select this component for applications requiring high PSRR and minimal static current consumption. The 3.0V fixed output eliminates the need for external resistors. Consider the thermal resistance of the X2-DFN1010-4 package when designing for high ambient temperatures or heavy loads near the 250mA limit.

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

This part belongs to the AP7353 series of low dropout regulators. The 'D' in the model number specifically denotes the version equipped with an internal auto-discharge switch. The 'FS4' suffix identifies the X2-DFN1010-4 surface-mount package, which offers a compact footprint for dense PCB layouts compared to larger packages.

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

AP7353-30FS4-7 (Non-discharge variant)

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

What is the function of the 'D' suffix in the AP7353D-30FS4-7?

The 'D' suffix indicates that the device includes an integrated N-channel auto-discharge resistor. When the Enable pin is pulled low, this resistor actively discharges the output capacitor to rapidly bring the output voltage to zero.

How does the AP7353D-30FS4-7 handle short-circuit conditions?

The regulator incorporates short-circuit protection that clamps the output current to approximately 350mA if the output pin is shorted to ground. This feature protects the device from damage due to overcurrent and overheating.