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IRU1260CM-IRU1260CMTR-IRU1260CPTR
Dual 1A and 6A Adj LDO Linear Regulator in a TO-263 7-Leads package
International
TOR Rectifier
Data Sheet No. PD94138
IRU1260
DUAL 6A AND IA LOW DROPOUT
POSITIVE ADJUSTABLE REGULATOR
FEATU RES
Guaranteed <1.3V Dropout at 6A (Output #2)
Guaranteed <0.6V Dropout at IA (Output #1)
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-ln Thermal Shutdown
APPLICATIONS
El Providing a Single Package Solution for GTL+ and
High Speed Bus Termination
El Dual Supply P550TM Applications
DESCRIPTION
The IRU1260 uses a proprietary process and combines
a dual low dropout adjustable output regulator in a single
package with one output having a minimum of 6A and
the other one having a IA output current capability. This
product is specifically designed to provide well regulated
supplies for low voltage ICs such as 3.3V to 1.5V and
2.5V supplies for the GTL+ termination and the new
clock for Pentium IITM applications. Other applications
include low cost dual supply for processors such as Intel
P550TM where 2.8V and 3.3V are needed for the Core
and the HO supplies from the 5V input.
TYPICAL APPLICATION
VO.JT1
- " 2.5V/1A
U1 chr2
IRU1260 Gm
1.5V/6A
'IHH' HHEfl
Figure 1 - Typical application of IRU1260 in the Pentium IITM design with the 1.5V output
providing for GTL+ termination while 2.5V supplies the clock chip.
Notes: Pentium IITM is trademark of Intel Corp.
P550TM is trademark of Intel Corp.
PACKAGE ORDER INFORMATION
Rev. 2.1
09/1 9102
To (°C) 7-PIN PLASTIC 7-PIN PLASTIC
T0-263 (M) Ultra Thin-PakTM (P)
0 To 150 IRU1260CM |RU1260CP
International
TOR Rectifier
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V IN) .................................................... 7V
Power Dissipation P.................................................... 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 ULTRA THIN-PAK (P)
vour1 7 Cl VOUT1
VIN 6 Cl VIN
vom 5 TI vomz
Gnd 4 Cl Gnd
VFB2 3 :i VFB2
VFB1 2 Cl VFB1
VCTRL 1 Cl VCTRL
9JA=30°CIW for 1"sq pad 0JA=30°CIW for 1"sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Cm=1p.F, Cour=10pF and TJ=0 to 150°C. Typical values
refer to TJ=25°C. A=6A for output #1 and IFL=1A for output #2. VFB=VOUT for both outputs. VcTRrr-1hN--3.3V.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
VCTRL Input Voltage 3.0 V
Reference Voltage VREF lo=10mA, TJ=25°C 1.188 1.200 1.212 V
lo=10mA 1.176 1.200 1.224
Line Regulation lo=10mA, VouT+1.3V<1hN=VcrRL<7V 0.2 %
Load Regulation (Note 1) 10mA
Dropout Voltage (Output #2) lo=4A, VCTRL=4.75V, Vm=3.3V 1.0 V
(Note 2) lo=3A, VCTRL=4.75V, VIN=3.3V 0.7
lo=2A, VCTRL=4.75V, VIN=3.3V 0.35 0.5
Dropout Voltage (Output #1) lo=1A, VCTRL=4.75V, Vm=3.3V 0.4 0.6 V
(Note 2) lo=1A, VcTmr-1hN--4.75V 1.3
Current Limit (Output #2) |CL2 AVo=100mV 6.1 A
Current Limit (Output #1) Ion AVo=100mV 1 .1 A
Thermal Regulation 30ms pulse, lo=IFL 0.01 0.02 %/W
Ripple Rejection f=120Hz, Co=25wF Tantalum,
lo=0.5 M IFL 70 dB
Feedback Pin Input Current IFB lo=10mA 0.02 wA
Temperature Stability lo=10mA 0.5 %
Long Term Stability TA=125°C, 1000Hrs 0.3 1 %
RMS Output Noise TA=25°C, 10HzMinimum Load Current (Note 3) 5 mA
Note 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: Dropout voltage is defined as the minimum dif- divider values are selected such that this current is au-
ferential voltage between VIN and Vow required to main- tomatically maintained.
tain regulation at Vow. It is measured when the output
voltage drops 1% below its nominal value.
2 Rev. 2.1
09/19/02
