FAN1117AS5X

Product Overview

The FAN1117AS5X from Fairchild Semiconductor is a linear voltage regulator IC configured as a positive, fixed-output device with one regulator. The supplied product data specifies a 5 V fixed output at up to 1 A, a maximum input voltage of 18 V, and a maximum dropout of 1.2 V at 1 A. It is a surface-mount part in a TO-261-4, TO-261AA package, with a supplier device package of SOT-223-4. The specified operating temperature range is 0°C to 125°C, and protection features include over current and over temperature. The supplied ProductStatus is Obsolete.

Key Features

• Positive fixed-output linear regulator with one regulator.
• 5 V fixed output with specified output current of 1 A.
• Maximum input voltage of 18 V and maximum dropout of 1.2 V at 1 A.
• PSRR of 72 dB at 120 Hz.
• Over current and over temperature protection.
• Surface-mount TO-261-4, TO-261AA package with SOT-223-4 supplier device package.
• Operating temperature range of 0°C to 125°C.

Applications

• Single 5 V rail for board-level circuits that require a fixed linear output from an input up to 18 V.
• Post-regulation stage after a higher-voltage supply when the load current is within the specified 1 A output capability.
• Surface-mount linear regulation in equipment operating within the specified 0°C to 125°C temperature range.

Design & Procurement Notes

For design use, confirm that the system input voltage, 5 V output, and load current remain within the supplied limits, including the 1.2 V maximum dropout at 1 A. The 72 dB PSRR at 120 Hz can be considered when input ripple rejection is relevant to the circuit. Because the device is surface-mount in a SOT-223-4 package, layout, thermal path, and board mounting should be reviewed against the specified 0°C to 125°C operating range. The supplied ProductStatus is Obsolete, so long-term design procurement should be planned accordingly.