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International Rectifier Electronic Components Datasheet

IRU1176 Datasheet

7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

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Data Sheet No. PD94132
IRU1176
7.5A ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR WITH SHUTDOWN INPUT
FEATURES
Guaranteed <0.65V Dropout at 7.5A
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-In Thermal Shutdown
APPLICATIONS
3.3V to 2.7V Intel I740 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
well.
TYPICAL APPLICATION
3.3V
C1
IRU1176
VIN 7
VIN 6
VCTRL 5
VOUT 4
Adj 3
SD 2
VSENSE 1
5V
C2 Q1
2.7V
R1
C3
R2
SD Enable
Figure 1 - Typical application of IRU1176.
PACKAGE ORDER INFORMATION
TJ (°C)
0 To 125
7-PIN PLASTIC
TO-263 (M)
IRU1176CM
7-PIN PLASTIC
Ultra Thin-PakTM (P)
IRU1176CP
Rev. 1.5
07/16/02
www.irf.com
1


International Rectifier Electronic Components Datasheet

IRU1176 Datasheet

7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

No Preview Available !

IRU1176
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
7-PIN PLASTIC TO-263 (M)
7-PIN PLASTIC ULTRA THIN-PAK TM(P)
Tab is
V OUT
FRONT VIEW
7
6
5
4
3
2
1
V IN
V IN
V CTRL
V OUT
Adj
SD
V SENSE
FRONT VIEW
Tab is
V OUT
7
6
5
4
3
2
1
V IN
V IN
V CTRL
V OUT
Adj
SD
V SENSE
θJA=35°C/W for 0.5" square pad
θJA=35°C/W for 0.5" square pad
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)
Dropout Voltage (Note 2)
(VIN - VOUT)
Current Limit
Minimum Load Current (Note 3)
Thermal Regulation
Ripple Rejection
SD Threshold Voltage
SD Input Current
SYM
VREF
TEST CONDITION
VCTRL=2.75V, VIN=2V, Io=10mA,
TJ=258C, VADJ=0V
VCTRL=2.7 to 12V, VIN=2.05V to 5.5V,
Io=10mA to 7.5A, 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 7.5A, VADJ=0V
VADJ=0V for all conditions below:
VIN=2.05V, Io=1.5A
VIN=2.05V, Io=3A
VIN=2.05V, Io=4A
VIN=2.05V, Io=7.5A
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, Io=7.5A
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
VCTRL=5V, SD=0V
MIN TYP MAX UNITS
1.225 1.250 1.275 V
1.225 1.250 1.275
0.5 mV
5 mV
0.95
1.00
1.05
1.15
V
0.075
0.150
0.200
0.375
V
7.7 9
A
5 10 mA
0.01 0.02 %/W
60 70
dB
VCTRL-1.4 VCTRL-2.2 V
94 130 mA
2 www.irf.com
Rev. 1.5
07/16/02


Part Number IRU1176
Description 7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
Maker International Rectifier
Total Page 8 Pages
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