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IRU1150CMIRFN/a18900avai4A Adj LDO Linear Regulator in a TO-263 5-Leads package
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IRU1150CM-IRU1150CMTR-IRU1150CP-IRU1150CPTR-IRU1150CS-IRU1150CSTR
4A Adj LDO Linear Regulator in a TO-263 5-Leads package
International
TOR Rectifier
Data Sheet No. PD94129
IRU1150
4A ULTRA LOW DROPOUT POSITIVE
EATU RES
0.7V Dropout at 4A
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-ln Thermal Shutdown
APPLICATIONS
El 3.3V to 2.7V Intel I740 Chip Set
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 spetyTcally 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 1740 chip set.
TYPICAL APPLICATION
3.3V fl
100qu:
|RU1150
t‘jMMj—ITII
VSEBSE
Figure 1 - Typical application of IRU1150 in a 3.3V to 2.7V for I740 chip.
PACKAGE ORDER INFORMATION
To (°C) 5-PIN PLASTIC 5-PIN PLASTIC 8-PIN PLASTIC
T0-263 (M) Ultra Thin-Pakm (P) SOIC (S)
0 To 125 IRU1150CM IRU1150CP IRU1150CS
Rev. 1.8 1
08/20/02
International
TOR Rectifier
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V IN) .................................................... 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) 8-PIN PLASTIC SOIC (S)
FRONT VIEW TOP VIEW
VIN 5 :IV'N VCTRL II EVOUT
Tab is WTRL Tab is 4 z1VCTRL vm E ZIVoUT
VOUT WUT VOUT 3 SW)“ Adj E EIVOUT
Adj 2 :IAdj
\/SENSE 1 :IVSENSE VSENSE E EVOUT
9JA=35°CIW for 0.5" square pad 0JA=35°CIW for 0.5" square pad 9JA=55°C/W for 1" Sq pad area
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Cm=1pLF, COUT=10pLF, and To=0 to 125°C.
Typical values refer to TJ=25°C. VOUT=VSENSE.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Reference Voltage VREF VCTRL=2.7 to 12V, Vm=2.05V to 5.5V,
lo=10mA to 4A, VADJ=0V 1.225 1.250 1.275 V
Line Regulation VCTRL=2.5V to 7V, Vm=1 .75V to 5.5V,
lo=10mA, VADJ=0V -5 -0.2 +5 mV
Load Regulation (Note 1) VCTRL=2.75V, Vm=2.1V,
lo=10mA to 4A, VADJ=0V -5 3 +5 mV
Dropout Voltage (Note 2) VADJ=0V for all conditions below:
(VCTRL - VOUT) VIN=2.05V, lo=1.5A 1.00 1.15 V
V|N=2.05V, lo=3A 1.05 1.15
Vm=2.05V, lo=4A 1.13 1.20
Dropout Voltage (Note 2) VADJ=0V for all conditions below:
(VIN - VOUT) Vcrmr-2.75V, lo=1.5A 0.26 0.38 V
VCTRL=2.75V, lo=3A 0.50 0.60
VCTRL=2.75V, lo=4A 0.70 1.15
Current Limit VCTRL=2.75V, VIN=2.05V,
AVo=100mV, VADJ=OV 4.2 4.65 6 A
Minimum Load Current (Note 3) VCTRL=5V, Vm=3.3V, VADJ=0V 1 10 mA
Thermal Regulation 30ms Pulse 0.01 %/W
Ripple Rejection VCTRL=5V, V|N=5V, lo=4A, VADJ=0V,
TJ=25°C, VRlPPLE=1VPP at 120Hz 70 dB
Control Pin Current VADJ=OV for all below conditions:
VCTRL=2.75V, 1AN=2.05V, lo=1.5A 16 25 mA
VCTRL=2.75V, VIN=2.05V, lo=3A 36 50
VCTRL=2.75V, VIN=2.05V, lo=4A 67 85
Adjust Pin Current IADJ Vcrmr-2.75V, VIN=2.05V, VADJ=0V 50 WA
2 Rev. 1.8
08/20/02
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