AP7353D-36CV4-7

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

The AP7353D-36CV4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 3.6V with a maximum guaranteed load 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 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 discharge path ensures rapid output voltage decay when the enable pin is deactivated.
• High ripple rejection capability provides stable power delivery in noise-sensitive RF and analog circuits.
• Low quiescent current consumption extends battery life in portable and wearable electronic devices.
• Built-in thermal shutdown and current limit protection safeguard against short-circuit and overheating events.

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

• RF power supplies
• Smartphones and tablets
• Portable media players
• Wireless communication equipment

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

Verify that the specific part number suffix 'D' corresponds to the required output discharge functionality, as standard versions lack this feature. Confirm package type CV4 matches the X1-WLB0707-4 footprint requirements. Ensure application design accounts for the 1µF minimum ceramic output capacitor requirement for stability. Check datasheet for absolute maximum ratings to prevent overstress during transient conditions.

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

Select this component when fast output discharge is critical for system power management or safety compliance. The 3.6V fixed output eliminates external resistor networks, simplifying PCB layout compared to adjustable regulators. Consider the 250mA current limit for applications requiring moderate load currents without excessive heat dissipation. Verify that the 2.0V minimum input voltage aligns with the lowest expected battery voltage in the target application.

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

This device belongs to the AP7353 family of low dropout regulators designed for handheld and wearable electronics. The 'D' suffix specifically denotes the inclusion of an internal auto-discharge resistor connected between the output and ground. This variant utilizes the X1-WLB0707-4 package, offering a compact footprint suitable for dense PCB layouts in modern mobile devices.

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

AP7353-36CV4-7 serves as the non-discharge equivalent within the same series. Cross-reference must verify if the absence of the output discharge function impacts system shutdown timing requirements.