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IRU1176CMIRN/a5962avai7.5A Adj LDO Linear Regulator in a TO-263 7-Leads package
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IRU1176CM-IRU1176CMTR-IRU1176CP-IRU1176CPTR
7.5A Adj LDO Linear Regulator in a TO-263 7-Leads package
International
OR Rectifier
Data Sheet No. PD94132
IRU1176
7.5A ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR WITH SHUTDOWN INPUT
FEATU RES
Guaranteed <0. 65V Dropout at 7. 5A
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-ln Thermal Shutdown
APPLICATIONS
El 3.3V to 2.7V Intel 1740 Chip Set
DESCRIPTION
The IRU1176 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. The IRU1176 also provides a conve-
nient shutdown pin that allows the regulator to be shut-
down and reduce the input current consumption. Unlike
the PNP type regulators this device does not have high
quiescent current during the start up mode making it
ideal for applications where there is limited current ca-
pability such operation from the 5V standby supply of
the computer power supply. One application is the new
generation of RDRAM memory that needs to provide 2.5V
from 3.3V input and be able to operate from 5VSB as
TYPICAL APPLICATION
3.3V y-Ctr-
C1 ci:
VIN El-o
VIN E--
m Isl-
IRU1 176 vour E 2.7V
Pct' 3 Rica
m El-- R2031
5V >—1I+ T T
$02 Q1 SD Enable
Figure 1 - Typical application of |RU1176.
PACKAGE ORDER INFORMATION
To (°C) 7-PIN PLASTIC 7-PIN PLASTIC
TO-263 (M) Ultra Thin-PakTM (P)
0 To 125 |RU1176CM IRU1176CP
Rev. 1.5
07I16I02
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
7-PIN PLASTIC TO-263 (M) 7-PIN PLASTIC ULTRA THIN-PAKTM(P)
FRONTVIEN
VIN 7 I VIN
VIN 6 Cl VIN
Tab is VCTRL Tab is 5 Cl VCTRL
VOUT lt" VOUT l E ht"
SD 2 Cl SD
VSENSE 1 Cl VSENSE
6JA=35°CNV for 0.5" square pad 9JA=35°C/W for 0.5" square pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1}.LF, COUT=10pLF and TJ=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=2.75V, V|N=2V, lo=10mA,
TJ=25°C, VADJ=0V 1.225 1.250 1.275 V
VCTRL=2.7 to 12V, VIN=2.05V to 5.5V,
lo=10mA to 7.5A, VADJ=OV 1.225 1.250 1.275
Line Regulation VCTRL=2.5V to 7V, Vm=1.75V to 5.5V,
lo=10mA , VADJ=0V 0.5 mV
Load Regulation (Note 1) VCTRL=2.75V, Vm=2.1V,
lo=10mA to 7.5A, VADJ=OV 5 mV
Dropout Voltage (Note 2) VADJ=0V for all conditions below:
(VCTRL - VOUT) VIN=2.05V, lo=1.5A 0.95 V
1hN=2.05V, lo=3A 1.00
V|N=2.05V, lo=4A 1.05
V|N=2.05V, lo=7.5A 1.15
Dropout Voltage (Note 2) VADJ=0V for all conditions below:
(VIN - VouT) Vcrmr-2.75V, lo=1.5A 0.075 V
VCTRL=2.75V, lo=3A 0.150
VCTRL=2.75V, |o=4A 0.200
chL=2.75V, lo=7.5A 0.375
Current Limit VCTRL=2.75V, Vm=2.05V,
AVo=100mV, VADJ=0V 7.7 9 A
Minimum Load Current (Note 3) VCTRL=5V, V|N=3.3V, VADJ=0V 5 10 mA
Thermal Regulation 30ms Pulse 0.01 0.02 %/W
Ripple Rejection VCTRL=5V, V|N=5V, lo=4A, VADJ=0V,
TJ=25°C, VRIPPLE=1VPP at 120Hz 60 70 dB
SD Threshold Voltage VCTRL-1.4 VCTRL-2.2 V
SD Input Current VCTRL=5V, SD=0V 94 130 WA
2 Rev. 1.5
07I16I02
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