AP7351D-33W5-7

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

The AP7351D-33W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 3.3V output with a maximum current of 150mA. It operates within an input voltage range of 1.4V to 5.5V and features ultra-low quiescent current of 0.5µA and standby current of 0.02µA. The device includes an enable pin for power management, offers ±1% output voltage accuracy, and provides ripple rejection up to 60dB at 1kHz. Packaged in SOT25, it supports operation from -40°C to +85°C.

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

• Ultra-low quiescent and standby currents extend battery life in portable devices
• Integrated enable pin allows precise control over regulator on/off states
• High ripple rejection ratio ensures clean power delivery for sensitive subsystems
• Built-in thermal shutdown and short-circuit protection enhance system reliability

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

• Wearable electronics
• IoT sensor modules
• Wireless communication modules
• Battery-operated devices
• Image sensors

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

Verify the specific package type matches the design requirements, as this part number corresponds to the SOT25 configuration. Confirm that the fixed 3.3V output aligns with the target circuit's voltage needs. Ensure the EN pin is properly biased according to the datasheet specifications to maintain intended functionality. Check for RoHS compliance status if required by local regulations.

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

Select this component when low power consumption is critical for extending operational time between battery replacements. The wide input voltage range accommodates various supply sources, while the small footprint suits dense PCB layouts. Consider the enable feature if system-level power sequencing or shutdown capabilities are necessary for the application architecture.

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

This device belongs to the AP7351D series of LDO regulators designed for low-power applications. The series offers multiple fixed output voltages and packaging options, including X2-DFN1010-4 and SOT25. It targets markets requiring high efficiency and minimal static current draw, such as consumer wearables and IoT nodes.

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

Consult official manufacturer documentation for qualified substitutes. Verify pin compatibility and electrical parameters before swapping components.

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

What is the function of the EN pin?

The EN pin controls the regulator's state; driving it high enables the output, while pulling it low activates shutdown mode.

Is the AP7351D-33W5-7 suitable for audio applications?

Yes, its high ripple rejection and low noise characteristics make it appropriate for noise-sensitive applications like audio subsystems.