IRU1175 Datasheet, PDF (1/6 Pages) International Rectifier – 7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

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 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 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 associ-
ated 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
Vctrl 4
IRU1175 ^{Vout 3}
R1
Adj 2
100
1%
Vsense 1
R2
124
1%
1175app1-1.0
5V
C2
10uF
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