UNISEM US1150
The US1150 product is a 4A 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 2.8V or lower voltages from 3.3V ATX power supplies where high efficiency of a switcher can be achieved without the cost and complexity associated with switching regulators.FEATURES
0.7V Dropout at 4A Fast Transient Response 1% Voltage Reference Initial Accuracy Built-in Thermal ShutdownDESCRIPTION
One such application is the new graphic chip sets that require anywhere from 2.4V to 2.7V supply such as the Intel I740 chip set.APPLICATIONS
3.3V to 2.7V Intel I740 chip set. TYPICAL APPLICATION 3.3V C1 Vin Vctrl 5 4 3 R1 US1150 Vout Adj Vsense 2.7V C3 R2 2 1 1150app1-1.0 5V C2 Typical application of US1150 in a 3.3V to 2.7V for I740 chip. PACKAGE ORDER INFORMATION Tj (°C) 0 TO 125 5 PIN PLASTIC 5 PIN PLASTIC TO263 (M) POWER FLEX (P) US1150CM US1150CP 8 PIN PLASTIC SOIC (S) US1150CS Rev. 1.2 10/28/99 2-1 US1150ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) ........................................................... 7V Control Input Voltage (Vctrl) .................................................. 14V Power Dissipation............................................. Internally Limited Storage Temperature Range ................................... -65°C TO 150°C Operating Junction Temperature Range .....................