AP7353D-36FS4-7

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

The AP7353D-36FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 3.6V with a guaranteed maximum output current 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 an integrated auto-discharge circuit that activates when the enable pin is pulled low. Packaged in an X2-DFN1010-4 (Type B) footprint, it offers high power supply rejection ratio performance and low output noise characteristics suitable for sensitive analog circuits.

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

• Integrated N-channel auto-discharge function to rapidly reduce output voltage during shutdown
• High ripple rejection ratio ensuring stable operation under varying load conditions
• Low output noise profile optimized for RF and communication equipment applications
• Built-in thermal shutdown and current limit protection mechanisms

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

• Smartphones and tablet computers
• RF power supply circuits
• Portable video recording devices
• Wireless communication modules

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

Verify the specific package type matches the required PCB layout dimensions before finalizing orders. Confirm that the D suffix indicating the discharge feature aligns with the system's power-down requirements. Ensure the component meets all applicable environmental compliance standards relevant to the target market.

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

Select this variant when a rapid output voltage decay is necessary after disabling the regulator. Compare the X2-DFN1010-4 package against alternative footprints if board space constraints differ from standard layouts. Evaluate the 250mA current capability against peak load demands to ensure adequate thermal headroom.

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

This component belongs to the AP7353 series of low dropout regulators designed for handheld and wearable electronics. The series provides various fixed output voltages ranging from 1.8V to 4.7V. The 'D' designation specifically denotes the inclusion of an internal discharge resistor network not present in the standard AP7353 variants.

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

AP7353-36FS4-7

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

What is the function of the 'D' suffix in the part number?

The 'D' suffix indicates that the regulator includes an integrated N-channel auto-discharge circuit, which actively pulls down the output voltage when the enable pin is disabled.

How does the AP7353D handle short-circuit conditions?

The device triggers short-circuit protection that clamps the output current to approximately 350mA, preventing damage from overcurrent or overheating events.