AP7353D-25CV4-7

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

The AP7353D-25CV4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 2.5V with a guaranteed maximum output current of 250mA. It operates within an input voltage range of 2.0V to 5.5V and features high power supply rejection ratio (PSRR) performance, achieving 90dB at 1kHz and 70dB at 10kHz under specified load conditions. The device incorporates an integrated auto-discharge circuit for rapid output voltage decay upon shutdown. Quiescent current is typically 18µA, while standby current drops to 0.1µA when disabled. Output voltage accuracy is maintained within ±1% across the full operating temperature range from -40°C to +85°C.

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

• Integrated N-channel MOSFET auto-discharge function ensures rapid output voltage decay when the enable pin is deactivated.
• High ripple rejection capability provides stable power delivery in noise-sensitive environments.
• Low quiescent current design optimizes battery life for portable electronic applications.
• Built-in thermal shutdown and current limit protection safeguard against overcurrent and overheating events.

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 'D' corresponds to the version with the integrated output discharge feature, as standard versions lack this function. Confirm package type CV4 matches the X1-WLB0707-4 footprint requirements. Ensure compliance with RoHS and halogen-free specifications if required by your manufacturing standards. Check datasheet for moisture sensitivity level and reflow soldering profile compatibility.

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

Select this component when a fast output discharge time is critical for system power management. The 2.5V fixed output suits digital logic or analog circuits requiring this specific rail. Consider the 250mA current capacity against peak load demands. Verify that the 2.0V minimum input voltage aligns with your battery or supply characteristics. The X1-WLB0707-4 package offers a compact solution for dense PCB layouts.

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

This device belongs to the AP7353 series of low dropout regulators designed for handheld and wearable electronics. The series emphasizes low noise and high PSRR to support sensitive RF and analog sections. The 'D' variant specifically adds an auto-discharge feature not present in the base AP7353 model, enhancing safety and power efficiency during shutdown states.

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

AP7353-25CV4-7 serves as a direct substitute if the auto-discharge feature is not required. Other AP7353 variants with different output voltages share the same package and pinout but require voltage verification. Cross-referencing with AP7353D-XXFS4-7 is possible if the X2-DFN1010-4 package is acceptable.

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

What is the difference between AP7353 and AP7353D?

The AP7353D includes an integrated N-channel MOSFET for auto-discharge, which rapidly pulls down the output voltage when disabled. The standard AP7353 lacks this feature and relies on external leakage or load capacitance for discharge.

How does the enable pin control the device operation?

Driving the EN pin high enables the regulator, while pulling it low activates the shutdown mode. In shutdown, the auto-discharge resistor connects the output to ground to dissipate stored charge.

What is the typical output noise specification?

The output noise voltage is typically 10µVrms measured over a bandwidth of 10Hz to 100kHz at a load current of 10mA.