FAN1951D18X

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

The FAN1951D18X is a positive fixed linear voltage regulator from the Fairchild Semiconductor FAN1950 series. It provides a fixed output voltage of 1.8V with a maximum output current capability of 1.5A. The device utilizes a TO-252-4 (DPAK) package, designed for low-voltage applications requiring efficient power regulation. Key electrical characteristics include a low dropout voltage and high ripple rejection ratio, ensuring stable performance under varying load conditions.

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

• Integrated over-current protection to safeguard against excessive load demands
• Built-in thermal shutdown circuitry prevents damage during overheating events
• Short-circuit protection ensures device safety during output fault conditions
• Enable pin allows for precise power management and system control

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

• Portable battery-powered equipment requiring efficient voltage regulation
• Cellular phones and wireless communication devices
• PDAs and personal digital assistants
• Laptop computers and mobile computing platforms

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

Verify the manufacturer origin, as Fairchild Semiconductor assets were acquired by onsemi. Confirm the specific suffix 'D18X' corresponds to the 1.8V output and DPAK package. Ensure RoHS compliance status matches project requirements. Cross-reference datasheet revisions to confirm pinout and electrical specifications remain consistent with design intent.

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

Select this component when a fixed 1.8V output at up to 1.5A is required in a compact surface-mount package. Consider the thermal performance of the TO-252-4 package relative to the expected ambient temperature and load current. Verify that the input voltage range supports the necessary dropout voltage for the application's minimum input supply.

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

This part belongs to the FAN1950/FAN1951 family of 1.5A Low-Voltage Low-Dropout Regulators. The series offers various fixed output voltages, distinguished by suffixes such as D25 for 2.5V or D18 for 1.8V. These regulators are designed for portable electronics where power efficiency and small form factor are critical constraints.

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

Compatible substitutes within the same family include FAN1951D25X for a 2.5V output requirement. Other variants like FAN1950D25X may offer similar electrical characteristics but require verification of specific feature sets and package compatibility before substitution.