AP7353D-25FS4-7

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

The AP7353D-25FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 2.5V output with a maximum current capacity of 250mA. It operates within an input voltage range of 2.0V to 5.5V and features a typical quiescent current of 18µA. The device incorporates high power supply ripple rejection of 90dB at 1kHz and low output noise of 10µVrms from 10Hz to 100kHz. Packaged in the X2-DFN1010-4 form factor, it includes integrated thermal shutdown and short-circuit protection mechanisms.

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

• Integrates an N-channel auto-discharge resistor that activates when the enable pin is pulled low, ensuring rapid output voltage decay for efficient system power management.
• Provides high power supply ripple rejection across multiple frequencies, maintaining signal integrity for sensitive RF and analog circuitry.
• Features a dedicated enable pin allowing precise control over regulator operation states, supporting both active regulation and deep standby modes.

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 the specific suffix 'D' indicates the inclusion of the internal discharge function, distinguishing this variant from non-discharge versions. Confirm the package code 'FS4' corresponds to the X2-DFN1010-4 footprint. Ensure the ordering suffix '-7' matches the required tape and reel quantity specifications for your manufacturing line.

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

Select this component when a fixed 2.5V rail is required alongside strict low-noise performance criteria. The inclusion of the discharge feature makes it suitable for applications requiring fast power-down sequences. Evaluate the thermal resistance characteristics of the X2-DFN1010-4 package against your PCB copper area constraints to ensure adequate heat dissipation under maximum load conditions.

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 emphasizes low quiescent current and high ripple rejection to extend battery life and maintain signal quality. The 'D' designation specifically differentiates models equipped with output discharge capabilities from standard variants.

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

AP7353-25FS4-7 (Non-discharge version)

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

What is the function of the 'D' suffix in the AP7353D-25FS4-7 part number?

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, facilitating faster system power-down compared to non-discharge versions.

How does the AP7353D-25FS4-7 handle short-circuit conditions?

The regulator incorporates built-in short-circuit protection that clamps the output current to approximately 350mA when the output is shorted to ground. This mechanism protects the device from overheating and potential damage during fault conditions.