Data Sheet No. PD94129
IRU1150
4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR DESCRIPTION
The IRU1150 is a 4A regul...
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...