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International Rectifier Electronic Components Datasheet

IRU1050 Datasheet

5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

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Data Sheet No. PD94126
IRU1050
FEATURES
Guaranteed < 1.3V Dropout at Full Load Current
Fast Transient Response
1% Voltage Reference Initial Accuracy
Output Current Limiting
Built-In Thermal Shutdown
APPLICATIONS
Low Voltage Processor Applications such as:
P54C, P55C, Cyrix M2,
POWER PC, AMD
GTL+ Termination
PENTIUM PRO, KLAMATH
Low Voltage Memory Termination Applications
Standard 3.3V Chip Set and Logic Applications
5A LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
DESCRIPTION
The IRU1050 is a low dropout three-terminal adjustable
regulator with minimum of 5A output current capability.
This product is specifically designed to provide well regu-
lated supply for low voltage IC applications such as
PentiumP54C,P55Cas well as GTL+ termination
for Pentium Proand Klamathprocessor applications.
The IRU1050 is also well suited for other processors
such as Cyrix, AMD and Power PCapplications.
The IRU1050 is guaranteed to have <1.3V dropout at full
load current making it ideal to provide well regulated
outputs of 2.5V to 3.3V with 4.75V to 7V input supply.
TYPICAL APPLICATION
5V
C1
1500uF
VIN 3
IRU1050 2VOUT
Adj 1
3.38V / 5A
R1
121
C2
R2 2x 1500uF
205
Figure 1 - Typical Application of IRU1050 in a 5V to 3.38V regulator designed
to meet the Intel P54C processors.
Notes: Pentium P54C, P55C, Klamath, Pentium Pro,VRE are trademarks of Intel Corp. Cyrix M2 is trademark of Cyrix Corp.
Power PC is trademark of IBM Corp.
PACKAGE ORDER INFORMATION
TJ (°C)
0 To 150
2-PIN PLASTIC
TO-252 (D-Pak)
IRU1050CD
3-PIN PLASTIC
TO-263 (M)
IRU1050CM
2-PIN PLASTIC
Ultra Thin-PakTM (P)
IRU1050CP
3-PIN PLASTIC
TO-220 (T)
IRU1050CT
Rev. 1.8
08/20/02
www.irf.com
1


International Rectifier Electronic Components Datasheet

IRU1050 Datasheet

5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

No Preview Available !

IRU1050
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN) ....................................................
Power Dissipation .....................................................
Storage Temperature Range ......................................
Operating Junction Temperature Range .....................
7V
Internally Limited
-65°C To 150°C
0°C To 150°C
PACKAGE INFORMATION
2-Pin Plastic TO-252 (D-Pak)
3-Pin Plastic TO-263 (M)
FRONT VIEW
3
V IN
FRONT VIEW
3
V IN
Tab is
V OUT
Tab is
V OUT
2 VOUT
2-Pin Plastic ULTRA THIN-PAKTM (P)
FRONT VIEW
3
V IN
Tab is
V OUT
1 Adj
θJA=70°C/W for 0.5" Sq pad
1 Adj
θJA=35°C/W for 1" Square pad
1 Adj
θJA=70°C/W for 1" Square pad
3-Pin Plastic TO-220 (T)
FRONTVIEW
Tab is
VOUT
3
2
VIN
VOUT
1 Adj
θJT=2.7°C/W θJA=60°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF, and TJ=0 to 1508C.
Typical values refer to TJ=258C.
PARAMETER
Reference Voltage
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Note 2)
Current Limit
Minimum Load Current (Note 3)
Thermal Regulation
Ripple Rejection
Adjust Pin Current
Adjust Pin Current Change
Temperature Stability
Long Term Stability
RMS Output Noise
SYM
VREF
DVo
IADJ
TEST CONDITION
Io=10mA, TJ=258C, VIN-Vo=1.5V
Io=10mA, VIN-Vo=1.5
Io=10mA, 1.3V<(VIN-Vo)<7V
VIN=3.3V, VADJ=0V, 10mA<Io<5A
Note 2, Io=4A
Io=5A
VIN=3.3V, DVo=100mV
VIN=3.3V, VADJ=0V
30ms Pulse, VIN-Vo=3V, Io=5A
f=120Hz, Co=25mF Tantalum,
Io=2.5A, VIN-Vo=3V
Io=10mA, VIN-Vo=1.5V, TJ=258C,
Io=10mA, VIN-Vo=1.5V
Io=10mA, VIN-Vo=1.5V, TJ=258C
VIN=3.3V, VADJ=0V, Io=10mA
TJ=1258C, 1000Hrs
TJ=258C, 10Hz<f<10KHz
MIN
1.238
1.225
5.1
TYP
1.25
1.25
1.1
5
0.01
MAX
1.262
1.275
0.2
0.4
1.2
1.3
10
0.02
UNITS
V
%
%
V
A
mA
%/W
60 70
dB
55 120 mA
0.2 5 mA
0.5 %
0.3 1 %
0.003
%Vo
Note 1: Low duty cycle pulse testing with Kelvin con-
nections is required in order to maintain accurate data.
Note 2: Dropout voltage is defined as the minimum dif-
ferential voltage between VIN and VOUT required to main-
tain regulation at VOUT. It is measured when the output
voltage drops 1% below its nominal value.
Note 3: Minimum load current is defined as the mini-
mum current required at the output in order for the out-
put voltage to maintain regulation. Typically the resistor
dividers are selected such that it automatically main-
tains this current.
2 www.irf.com
Rev. 1.8
08/20/02


Part Number IRU1050
Description 5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
Maker International Rectifier
Total Page 12 Pages
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