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IRU1075
7.5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
IntEyrnraticruc/
1:211 fky:ctifia-
Data Sheet No. PD94128
IRU1075
FEATU RES
" 1V Dropout at Full Load Current
I: Fast Transient Response
I: 1% Voltage Reference Initial Accuracy
I: Output Current Limiting
I: Built-ln Thermal Shutdown
APPLICATIONS
Low Voltage Processor Applications such as:
P54CTM, P550TM Cyrix M2TM,
POWER PCTM, AMD
" GTL+ Termination
PENTIUM PROTM, KLAMATHTM
" Low Voltage Memory Termination Applications
" Standard 3.3V Chip Set and Logic Applications
7.5A LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
DESCRIPTION
The IRU1075 is a Iowdropout three-terminal adjustable
regulator with minimum of 7.5A output current capabil-
ity. This product is specifically designed to provide well
regulated supply for low voltage IC applications such as
PentiumTM P54CTM, PSSCTM as well as GTL+ termina-
tion for Pentium ProTM and KlamathTM processor appli-
cations. The IRU1075 is also well suited for other pro-
cessors such as CyrixTM, AMD and Power PCTM appli-
cations. The IRU1075 is guaranteed to have <1.2V drop-
out at full load current making it ideal to provide well
regulated outputs such as 3.3V with input supply volt-
age as low as 4.5V minimum.
TYPICAL APPLICATION
1500uF T
1075ipa1-1_0
WI [sl--
|RU1075 Vout E R1 - 3.3V
. R2 2x 1500uF
Ad] 1 200 I
Typical application of IRU1075 in a 5V to 3.3V regulator
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) 3-PIN PLASTIC 3-PIN PLASTIC 3-PIN PLASTIC
TO-220 (T) TO-263 (M) Ultra Thin-Pak (P)
0 To 150 |RU1075CT IRU1075CM IRU1075CP
Rev. 1.1
06/29/01
IRU1075
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) B................................................... 7V
Power Dissipation B.................................................... Internally Limited
Storage Temperature Range ...................................... -65°C To 150°C
Operating Junction Temperature Range ..................... 0°C To 150°C
PACKAGE INFORMATION
3-PIN PLASTIC TO-220 (T) 3-PIN PLASTIC TO-263 (M) 3-PIN PLASTIC ULTRA THIN-PAK (P)
FRONT VIEW FRONT VIEW
a Mn 3 S 1hn 3 Cl Mn
T2323 2 Vout T6333 2 = Vout Ttls, 2 Cl Vout
1 Ad] 1 3 Adj 1 Cl Adi
0JT=2.7°C/W 6JA=60°CNV 6JA=35°CIW for 1" Square pad 6JA=35°CNV for 1" Square pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Cin=1wF, Cout=10wF, and Tj=0 to 150°C.
Typical values refer to Tj=25°C.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Reference Voltage Vref lo=10mA, Tj=25°C, (Vin-Vo)=1.5V 1.238 1.250 1.262 V
lo=10mA, (Vin-Vo)=1.5V 1.225 1.250 1.275
Line Regulation lo=10mA, 1.3V<(Vin-Vo)<7V 0.2 %
Load Regulation (Note 1) Vin=3.3V, Vadj=0, 10mA
Dropout Voltage lo=7.5A 1.0 1.2 V
(Note 2) AVo lo=4A 0.92 1.1
Current Limit Vin=3.3V, dVo=100mV 7.6 9 A
Minimum Load Current Vin=3.3V, Vadj=0V 5 10 mA
(Note 3)
Thermal Regulation 30ms Pulse, Vin-Vo=3V, lo=7.5A 0.02 %/W
Ripple Rejection f=120Hz, Co=25wF Tantalum,
lo=7.5A, Vin-Vo=3V 60 70 dB
Adjust Pin Current lad] |o=10mA, Vin-Vo-iN, Tj=25°C,
lo=10mA, Vin-Vo-V 55 120 WA
Adjust Pin Current Change lo=10mA, Vin-Vo=1.5V, Tj=25°C 0.2 5 WA
Temperature Stability Vin=3.3V, Vadj=OV, lo=10mA 0.5 %
Long Term Stability Tj=125°C, 1000Hrs 0.3 %
RMS Output Noise Tj=25°C, 10HzNote I: Low duty cycle pulse testing with Kelvin con- Note 3: Minimum load current is defined as the mini-
nections is required in order to maintain accurate data. mum current required at the output in order for the out-
put voltage to maintain regulation. Typically the resistor
Note 2: Dropoutvoltage is defined as the minimum dif- dividers are selected such that it automatically main-
ferential voltage between Vin and Vout required to main- tains this current.
tain regulation at Vout. It is measured when the output
voltage drops 1% below its nominal value.
2 Rev. 1.1
06l29l01
