IRU1150 Datasheet, PDF (1/6 Pages) International Rectifier – 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

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
Data Sheet No. PD94129
IRU1150
4A ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
DESCRIPTION
The IRU1150 is a 4A regulator with extremely low drop-
out 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 requir-
ing 2.8V or lower voltages from 3.3V ATX power supplies
where high efficiency of a switcher can be achieved with-
out 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.
3.3V
C1
100uF
VIN 5
IRU1150
VCTRL 4
VOUT 3
Adj 2
VSENSE 1
5V
C2
100uF
2.7V
R1
102
C3
R2
100uF
118
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-Pak^TM (P)
IRU1150CP
8-PIN PLASTIC
SOIC (S)
IRU1150CS
Rev. 1.6
03/18/02
www.irf.com
1