DESCRIPTION
An adjustable controller with a 1.2V reference is available, while two selectable outputs are provided for the VTT (1.25 V or 1.5V, SC1112) or (1.2V or 1.5V, SC1112A) and the AGP (1.5V or 3.3V). The SC1112 low dropout regulators are designed to track the 3.3V power supply as the VTTIN supply is cycled On and Off. A latched short circuit protection is also available for the VTT output. Other features include an integrated charge pump that provides adequate gate drives for the external Mosfets, and a capacitive programable delay for the power good signal. SC1112 .eatures K Triple linear controllers K Selectable and Adjustable Output Voltages K LDOs track input voltage within 200mV (.unction of the Mosfets used) until regulation K Integrated Charge Pump K Programmable Power Good delay Signal K Latched Over Current Protection (VTT) APPLICATIONS
K Pentium® III Motherboards K Triple power supplies Typical Application Circuit +3.3V VTT +5V STBY 1K R1 POWER GOOD C6 330u Q2 5VSTBY A...
Semtech Corporation
