IRU1175

IRU1175 FEATURES 7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR PRELIMINARY DATASHEET DESCRIPTION 0.5V Dropout at 7.5A (Equivalent of 67mΩ) Fast Transient Response 1% Voltage Reference Initial Accuracy Built-in Thermal Shutdown APPLICATIONS 3.3V to 2.7V Intel I740 chipset The IRU1175 is a 7.5A regulator with extremely low dropout voltage using a proprietary bipolar process that achieves comparable equivalent on resistance to that of discrete MOSFETs. This product is specifically designed to provide well regulated supply for applications requiring very low dropout such as 2.8V from 3.3V ATX power supplies where the same efficiency as the switcher can be achieved without the cost and complexity associated with switching regulators. One such application is the new graphic chipsets that requires 2.7V supply such as the Intel I740 chipset. TYPICAL APPLICATION 3.3V C1 100uF Vin 5 IRU1175 Vctrl 4 Vout 3 Adj 2 1175app1-1.0 5V Vsense 1 C2 10uF R1 100 1% R2 124 1% Typical application of IRU1175 2.7V C3 100uF PACKAGE ORDER INFORMATION Tj (°C) 0 TO 125 5-PIN PLASTIC 5-PIN PLASTIC 8-PIN PLASTIC TO-263 (M) ULTRA THIN-PAK (P) SOIC (S) IRU1175CM IRU1175CP IRU1175CS Rev. 1.2 11/29/99 2-79 IRU1175 ABSOLUTE MAXIMUM RATINGS Input Voltage (Vin) ................................................. 6V Control Input Voltage (Vctrl) ....................................... 14V Power Dissipation..................................................... Internally Limited Storag...