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ADJUSTABLE REGULATOR. IRU1150PBF Datasheet |
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Data Sheet No. PD94129 revA
IRU1150(PbF)
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
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.
TYPICAL APPLICATION
3.3V
C1
100uF
VIN 5
IRU1150
VCTRL 4
VOUT 3
Adj 2
VSENSE 1
2.7V
R1
102
C3
R2 100uF
118
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
Basic Part (Non-Lead Free)
5-PIN PLASTIC
TO-263 (M)
IRU1150CM
5-PIN PLASTIC
Ultra Thin-PakTM (P)
IRU1150CP
8-PIN PLASTIC
SOIC (S)
IRU1150CS
TJ (°C)
0 To 125
Leadfree Part
5-PIN PLASTIC
TO-263 (M)
Not available
5-PIN PLASTIC 8-PIN PLASTIC
Ultra Thin-PakTM (P)
SOIC (S)
Not available IRU1150CSPbF
www.irf.com
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IRU1150(PbF)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN) ....................................................
Control Input Voltage (VCTRL) .....................................
Power Dissipation .....................................................
Storage Temperature Range ......................................
Operating Junction Temperature Range .....................
7V
14V
Internally Limited
-65°C To 150°C
0°C To 150°C
PACKAGE INFORMATION
5-PIN PLASTIC TO-263 (M)
5-PIN PLASTIC ULTRA THIN-PAKTM (P)
Tab is
VOUT
FRONT VIEW
5
4
3
2
1
VIN
VCTRL
VOUT
Adj
VSENSE
Tab is
VOUT
FRONT VIEW
5
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=1µF, COUT=10µF, and TJ=0 to 125 C.
Typical values refer to TJ=25 C. VOUT=VSENSE.
PARAMETER
Reference Voltage
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Note 2)
(VCTRL - VOUT)
Dropout Voltage (Note 2)
(VIN - VOUT)
Current Limit
Minimum Load Current (Note 3)
Thermal Regulation
Ripple Rejection
Control Pin Current
Adjust Pin Current
SYM
VREF
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,
∆Vo=100mV, VADJ=0V
VCTRL=5V, VIN=3.3V, VADJ=0V
30ms Pulse
VCTRL=5V, VIN=5V, Io=4A, VADJ=0V,
TJ=25 C, 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 TYP MAX UNITS
1.225 1.250 1.275 V
-5 -0.2 +5 mV
-5 3 +5 mV
1.00 1.15
1.05 1.15
1.13 1.20
V
0.26 0.38
0.50 0.60
0.70 1.15
V
4.2 4.65
1
0.01
6A
10 mA
%/W
70 dB
16 25 mA
36 50
67 85
50 µA
2 www.irf.com
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