FAN1112DX

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

The FAN1112DX is a fixed-output linear voltage regulator manufactured by onsemi, classified under PMIC LDO regulators. It provides a fixed positive output voltage of 1.2V with a maximum continuous output current of 1A. The device supports an input voltage range up to a maximum of 18V and exhibits a maximum dropout voltage of 1.2V at full load. Key electrical specifications include a power supply rejection ratio (PSRR) of 72dB at 120Hz. It features integrated overcurrent and overtemperature protection mechanisms and includes an enable control feature. The component operates within a temperature range of -40°C to +125°C and is housed in a TO-252AA surface-mount package.

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

• Provides a stable fixed 1.2V output for low-voltage digital logic applications
• Integrates overcurrent and thermal shutdown protection for system reliability
• Includes an enable pin for precise power management and sequencing control

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

• Portable battery-powered equipment requiring efficient voltage regulation
• Post-regulation stages for switching power supplies
• Battery chargers and adapters needing stable low-voltage rails

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

Verify the obsolete status of the FAN1112DX before procurement planning. Confirm availability of qualified replacement components such as the NCV1117ST12T3G from onsemi or equivalent parts from other manufacturers. Ensure that any substitute part matches the required 1.2V output, 1A current rating, and TO-252AA package dimensions to maintain board compatibility and performance specifications.

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

Select this component for designs requiring a simple, cost-effective 1.2V rail with moderate current demands. Consider the 1.2V dropout voltage when determining the minimum input voltage required to maintain regulation at 1A load. Verify that the thermal dissipation capabilities of the TO-252AA package are sufficient for the expected ambient temperature and power loss conditions in the final application environment.

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

The FAN1112 belongs to the FAN1112 series of low-dropout linear regulators from onsemi. These devices are designed for general-purpose voltage regulation tasks where noise immunity and simplicity are prioritized. The DX suffix typically denotes the specific tape-and-reel packaging configuration for automated assembly processes.

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

The NCV1117ST12T3G is a confirmed similar replacement part available from onsemi. Verify pinout compatibility and thermal characteristics when substituting.