IRU1150

Data Sheet No. PD94129 IRU1150 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR DESCRIPTION The IRU1150 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. 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. FEATURES 0.7V Dropout at 4A Fast Transient Response 1% Voltage Reference Initial Accuracy Built-In Thermal Shutdown APPLICATIONS 3.3V to 2.7V Intel I740 Chip Set TYPICAL APPLICATION 3.3V C1 100uF VIN VCTRL 5 4 3 2 1 R1 102 R2 118 C3 100uF IRU1150 VOUT Adj VSENSE 2.7V 5V C2 100uF Figure 1 - Typical application of IRU1150 in a 3.3V to 2.7V for I740 chip. PACKAGE ORDER INFORMATION TJ (°C) 0 To 125 5-PIN PLASTIC TO-263 (M) IRU1150CM 5-PIN PLASTIC Ultra Thin-PakTM (P) IRU1150CP 8-PIN PLASTIC SOIC (S) IRU1150CS Rev. 1.6 03/18/02 www.irf.com 1 IRU1150 ABSOLUTE MAXIMUM RATINGS Input Voltage (V IN) .................................................... Control Input Voltage (V CTRL) ..................................... Power Dissipation ..................................................... Storage Temperat...