This document is a schematic diagram of the AGP power supply circuit of the SC1112/A chip. The chip is manufactured by the brand RA. The model is SC1112/A.
The SC1112 is designed for Pentium III motherboards to provide power for system AGTL bus termination voltage, chipset, and clock circuitry. It includes three linear controllers with adjustable or selectable output voltages for VTT (1.2V/1.5V), AGP (1.5V/3.3V), and ADJ.
| Supply Voltage (5VSTBY) | 4.75 to 5.25 V |
|---|---|
| Operating Temperature Range | 0 to +125 °C |
| VTT Output Voltage (SC1112) | 1.25 V typical |
| AGP Output Voltage (Low Select) | 1.5 V typical |
| Tracking Difference | 200 mV max |
The SC1112 provides selectable outputs of 1.25V or 1.5V for VTT, and 1.5V or 3.3V for AGP.
Yes, it includes an integrated charge pump that provides adequate gate drives for external Mosfets.