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IRU1260CMTR

P1-P3P4-P6P7-P9P10-P12
IRU1260
1
Rev. 2.1
09/19/02
www.irf.com
TYPICAL APPLICATION
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 1A 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 II
TM
applications. Other applications
include low cost dual supply for processors such as Intel
P55C
TM
where 2.8V and 3.3V are needed for the Core
and the I/O supplies from the 5V input.
DUAL 6A AND 1A LOW DROPOUT
POSITIVE ADJUSTABLE REGULATOR
Figure 1 - Typical application of IRU1260 in the Pentium II
TM
design with the 1.5V output
providing for GTL+ termination while 2.5V supplies the clock chip.
Notes: Pentium II
TM
is trademark of Intel Corp.
P55C
TM
is trademark of Intel Corp.
PACKAGE ORDER INFORMATION
TJ (°C) 7-PIN PLASTIC 7-PIN PLASTIC
TO-263 (M) Ultra Thin-Pak
TM
(P)
0 To 150 IRU1260CM IRU1260CP
Data Sheet No. PD94138
FEATURES
Providing a Single Package Solution for GTL+ and
High Speed Bus Termination
Dual Supply P55C Applications
APPLICATIONS
Guaranteed <1.3V Dropout at 6A (Output #2)
Guaranteed <0.6V Dropout at 1A (Output #1)
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-In Thermal Shutdown
3.3V 2.5V / 1A
1.5V / 6A
C1
R1
R2
R3
R4
C2
C3
IRU1260
5V
C5
U1
C4
R5
V
CTRL
V
FB
1
V
FB
2
Gnd
V
OUT
2
V
IN
V
OUT
1
1
2
3
4
5
6
7
IRU1260
2
Rev. 2.1
09/19/02
www.irf.com
VCTRL Input Voltage
Reference Voltage
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Output #2)
(Note 2)
Dropout Voltage (Output #1)
(Note 2)
Current Limit (Output #2)
Current Limit (Output #1)
Thermal Regulation
Ripple Rejection
Feedback Pin Input Current
Temperature Stability
Long Term Stability
RMS Output Noise
Minimum Load Current (Note 3)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN) .................................................... 7V
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 ULTRA THIN-PAK (P)
θJA=308C/W for 1"sq pad θJA=308C/W for 1"sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF and TJ=0 to 150°C. Typical values
refer to TJ=25°C. IFL=6A for output #1 and IFL=1A for output #2. VFB=VOUT for both outputs. VCTRL=VIN=3.3V.
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
divider values are selected such that this current is au-
tomatically maintained.
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.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Io=10mA, TJ=25°C
Io=10mA
Io=10mA, VOUT+1.3V<VIN=VCTRL<7V
10mA<Io<IFL
Io=4A, VCTRL=4.75V, VIN=3.3V
Io=3A, VCTRL=4.75V, VIN=3.3V
Io=2A, VCTRL=4.75V, VIN=3.3V
Io=1A, VCTRL=4.75V, VIN=3.3V
Io=1A, VCTRL=VIN=4.75V
DVo=100mV
DVo=100mV
30ms pulse, Io=IFL
f=120Hz, Co=25mF Tantalum,
Io=0.5 3 IFL
Io=10mA
Io=10mA
TA=125°C, 1000Hrs
TA=25°C, 10Hz<f<10KHz
3.0
1.188
1.176
6.1
1.1
V
V
%
%
V
V
A
A
%/W
dB
mA
%
%
%VO
mA
1.212
1.224
1.0
0.7
0.5
0.6
1.3
0.02
1
1.200
1.200
0.2
0.4
0.35
0.4
0.01
70
0.02
0.5
0.3
0.003
5
VREF
ICL2
ICL1
IFB
VCTRL
VFB1
VFB2
Gnd
VOUT 2
VIN
VOUT 1
1
2
3
4
5
6
7
1
2
3
4
5
6
7
VCTRL
VFB1
VFB2
Gnd
VOUT2
VIN
VOUT1
IRU1260
3
Rev. 2.1
09/19/02
www.irf.com
BLOCK DIAGRAM
Figure 2 - Simplified block diagram of the IRU1260.
The control input pin of the regulator. This pin via a 10V resistor is connected to the 5V
supply to provide the base current for the pass transistor of both regulators. This allows
the regulator to have very low dropout voltage which allows one to generate a well regu-
lated 2.5V supply from the 3.3V input. A high frequency, 1mF capacitor is connected
between this pin and VIN pin to insure stability.
A resistor divider from this pin to VOUT1 pin and ground sets the output voltage. See
application circuit for the divider setting for 2.5V output.
A resistor divider from this pin to the VOUT2 pin and ground sets the output voltage. See
application circuit for the divider setting for 1.5V output.
This pin is connected to ground. It is also the tab of the package.
The output #2 (high current) of the regulator. A minimum of 100mF capacitor must be
connected from this pin to ground to insure stability.
The power input pin of the regulator. Typically a large storage capacitor is connected from
this pin to ground to insure that the input voltage does not sag below the minimum dropout
voltage during the load transient response. This pin must always be higher than both VOUT
pins by the amount of the dropout voltage in order for the device to regulate properly.(See
data sheet)
The output #1 (low current) of the regulator. A minimum of 100mF capacitor must be
connected from this pin to ground to insure stability.
PIN # PIN SYMBOL PIN DESCRIPTION
PIN DESCRIPTIONS
1
2
3
4
5
6
7
VCTRL
VFB1
VFB2
Gnd
VOUT2
VIN
VOUT1
V
CTRL
V
IN
Gnd
6
1
4
5 V
OUT
2
7 V
OUT
1
THERMAL
SHUTDOWN
1.20V
2 V
FB
1
3 V
FB
2
+
P1-P3P4-P6P7-P9P10-P12

IRU1260CMTR

Mfr. #:
Buy IRU1260CMTR
Manufacturer:
Infineon Technologies
Description:
IC REG CONV PENTIUM 2OUT TO263-7
Lifecycle:
New from this manufacturer.
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