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International Rectifier Electronic Components Datasheet

IRU1150 Datasheet

4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

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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-PakTM (P)
IRU1150CP
8-PIN PLASTIC
SOIC (S)
IRU1150CS
Rev. 1.6
03/18/02
www.irf.com
1


International Rectifier Electronic Components Datasheet

IRU1150 Datasheet

4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

No Preview Available !

IRU1150
ABSOLUTE 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 ..................... 0°C To 150°C
PACKAGE INFORMATION
5-PIN PLASTIC TO-263 (M)
5-PIN PLASTIC ULTRA THIN-PAKTM (P)
Tab is
V OUT
FRONT VIEW
5
4
3
2
1
VIN
VCTRL
VOUT
Adj
VSENSE
FRONT VIEW
5
Tab is
V OUT
4
3
2
1
VIN
VCTRL
VOUT
Adj
VSENSE
θJA=35°C/W for 0.5" square pad
θJA=35°C/W for 0.5" square pad
8-PIN PLASTIC SOIC (S)
TOP VIEW
VCTRL 1
8 VOUT
VIN 2
7 VOUT
Adj 3
6 VOUT
VSENSE 4
5 VOUT
θJA=55°C/W for 1" Sq pad area
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF, and TJ=0 to 1258C.
Typical values refer to TJ=258C. VOUT=VSENSE.
PARAMETER
Reference Voltage
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Note 2)
(VCTRL - VOUT)
SYM
VREF
Dropout Voltage (Note 2)
(VIN - VOUT)
Current Limit
Minimum Load Current (Note 3)
Thermal Regulation
Ripple Rejection
Control Pin Current
Adjust Pin Current
IADJ
TEST CONDITION
VCTRL=2.7 to 12V, VIN=2.05V to 5.5V,
Io=10mA to 4A, VADJ=0V
VCTRL=2.5V to 7V, VIN=1.75V to 5.5V,
Io=10mA ,VADJ=0V
VCTRL=2.75V, VIN=2.1V,
Io=10mA to 4A, VADJ=0V
VADJ=0V for all conditions below:
VIN=2.05V, Io=1.5A
VIN=2.05V, Io=3A
VIN=2.05V, Io=4A
VADJ=0V for all conditions below:
VCTRL=2.75V, Io=1.5A
VCTRL=2.75V, Io=3A
VCTRL=2.75V, Io=4A
VCTRL=2.75V, VIN=2.05V,
DVo=100mV, VADJ=0V
VCTRL=5V, VIN=3.3V, VADJ=0V
30ms Pulse
VCTRL=5V, VIN=5V, Io=4A, VADJ=0V
TJ=258C, VRIPPLE=1VPP at 120Hz
VADJ=0V for all below conditions:
VCTRL=2.75V, VIN=2.05V, Io=1.5A
VCTRL=2.75V, VIN=2.05V, Io=3A
VCTRL=2.75V, VIN=2.05V, Io=4A
VCTRL=2.75V, VIN=2.05V, VADJ=0V
MIN
1.225
-5
-5
4.2
TYP
1.250
-0.2
3
1.00
1.05
1.13
0.26
0.50
0.70
4.65
1
0.01
70
16
36
67
50
MAX
1.275
+5
+5
1.15
1.15
1.20
0.38
0.60
1.15
6
10
25
50
85
UNITS
V
mV
mV
V
V
A
mA
%/W
dB
mA
mA
2 www.irf.com
Rev. 1.6
03/18/02


Part Number IRU1150
Description 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
Maker International Rectifier
Total Page 6 Pages
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