FAN1117AT33

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

The FAN1117AT33 is a fixed positive low-dropout linear voltage regulator manufactured by onsemi. It provides a stable 3.3 V output with a maximum current capacity of 1 A. The device operates within an input voltage range of 2.5 V to 17 V and features a maximum dropout voltage of 1.2 V at full load. It has a quiescent current of 13 mA and line regulation of 0.2 %/V. The component is housed in a TO-220-3 through-hole package and supports an operating temperature range from 0 °C to +125 °C.

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

• Provides a fixed 3.3 V output voltage for power supply applications
• Capable of delivering up to 1 A of continuous output current
• Operates with a wide input voltage range extending up to 17 V
• Includes internal thermal overload and short-circuit protection mechanisms

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

• General-purpose power supply regulation
• Battery-powered equipment voltage conditioning
• Post-regulation for switching power supplies

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

Verify the specific suffix and manufacturer designation when sourcing, as this part may be discontinued or superseded by newer automotive-grade equivalents like the NCV series. Confirm RoHS compliance status and check for authorized distributors offering remaining stock or valid substitutes. Ensure the TO-220-3 through-hole package matches your board design requirements before ordering.

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

Select this component when a fixed 3.3 V rail is required with high current capability in a through-hole configuration. Consider the 1.2 V dropout voltage at 1 A load to ensure sufficient input-output differential. Evaluate thermal management needs due to the TO-220 package's heat dissipation characteristics under high load conditions.

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

This regulator belongs to the FAN1117 family of low-dropout linear regulators. It shares functional similarities with other fixed-voltage variants in the series but is distinguished by its 3.3 V output setting and TO-220-3 through-hole packaging. The family is designed for general-purpose voltage regulation tasks requiring simple implementation and robust performance.

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

Public confirmed substitute part numbers include NCP1117DT33T5G and NCP1117DT33G. These alternatives offer similar electrical specifications but utilize surface-mount DPAK packages instead of the through-hole TO-220-3 form factor.