AP7353-45FS4-7

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

The AP7353-45FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 4.5V with a maximum guaranteed output current of 250mA. It operates within an input voltage range of 2.0V to 5.5V and maintains high accuracy with a ±1% tolerance on the output voltage. The device features a typical quiescent current of 18µA and offers high ripple rejection of 90dB at 1kHz under light load conditions. Packaged in an X2-DFN1010-4 (Type B) footprint, it supports operation across an ambient temperature range from -40°C to +85°C.

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

• Integrated enable pin for precise power management control
• High ripple rejection ratio suitable for noise-sensitive circuits
• Low output noise characteristics for analog applications
• Built-in short-circuit and thermal shutdown protection

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

• RF supply circuits
• Smartphones and tablets
• Portable video devices
• Wireless communication equipment

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

Verify the specific package type matches the required PCB layout dimensions before ordering. Confirm that the fixed 4.5V output aligns with the target circuit design requirements. Ensure the EN pin is properly biased according to the datasheet specifications to maintain stable operation. Check for any specific automotive qualification needs if deploying in vehicle environments.

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

Select this component when a compact solution with high PSRR is required for battery-powered systems. The X2-DFN1010-4 package provides a smaller footprint compared to traditional SOT packages. Consider the 250mA current limit when sizing external capacitors and ensuring adequate thermal dissipation on the PCB copper area.

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 communication equipment. The series includes various fixed output voltages ranging from 1.8V to 4.7V. The FS4 suffix specifically denotes the X2-DFN1010-4 package variant, which allows for denser PCB layouts while maintaining electrical performance standards.

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

AP7353-45CV4-7