FAN1616AS33X

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

The FAN1616AS33X is a fixed positive Low Dropout (LDO) voltage regulator manufactured by onsemi, formerly Fairchild Semiconductor. It provides a stable 3.3V output with a maximum dropout voltage of 1.2V at full load. The device supports an output current of 0.5A and operates within an input voltage range defined by a minimum differential of 1.5V and a maximum of 5.75V. It is housed in a lead-free SOT-223 package with four pins. Key electrical characteristics include a line regulation of 0.022%/V and a load regulation of 0.5%. The quiescent current is typically 4mA, and it offers ripple rejection of 60dB at 120Hz.

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

• Provides low dropout performance to ensure high efficiency during voltage conversion from higher input rails.
• Integrates internal protection mechanisms including current limiting and thermal shutdown for robust operation.
• Delivers stable regulated output suitable for sensitive digital logic and memory components.

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

• USB Hub power supply circuits
• Motherboard voltage regulation
• SDRAM module power delivery

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

Verify the manufacturer origin as onsemi or Fairchild Semiconductor, as legacy branding may appear on older stock. Confirm the suffix indicates the fixed 3.3V version rather than the adjustable variant. Ensure the package matches the SOT-223 specification and check for lead-free compliance markings if required by specific environmental standards.

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

Select this component when a fixed 3.3V rail is required with moderate current demands up to 0.5A. It is appropriate for applications where space is constrained due to the compact SOT-223 footprint. Consider the 1.2V dropout requirement to ensure the input voltage remains sufficiently above the output level under all operating conditions.

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

This part belongs to the FAN1616 series of LDO regulators designed for USB control power and motherboard applications. The series includes both fixed voltage versions like the 3.3V model and adjustable variants. These regulators are engineered for high efficiency and transient response, making them suitable for dynamic load environments typical in computing and peripheral interfaces.

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

The FAN1616AS33XNL is a lead-free equivalent variant of the same functional device. Other parts in the FAN1616 family share similar electrical characteristics but differ in output voltage adjustability or fixed values.