IRU1175CP IRF [International Rectifier], IRU1175CP Datasheet

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IRU1175CP

Manufacturer Part Number
IRU1175CP
Description
7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
Manufacturer
IRF [International Rectifier]
Datasheet
FEATURES
TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
Rev. 1.2
11/29/99
APPLICATIONS
0.5V Dropout at 7.5A (Equivalent of 67m
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-in Thermal Shutdown
3.3V to 2.7V Intel I740 chipset
1175app1-1.0
0 TO 125
Tj (
IRU1175
°
C)
3.3V
5V
5-PIN PLASTIC
Vsense
TO-263 (M)
IRU1175CM
Vctrl
Vout
Adj
Vin
Typical application of IRU1175
100uF
C1
5
4
3
2
1
7.5A ULTRA LOW DROPOUT POSITIVE
ULTRA THIN-PAK (P)
C2
10uF
DESCRIPTION
The IRU1175 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. This product is specifically designed
to provide well regulated supply for applications requir-
ing very low dropout such as 2.8V from 3.3V ATX power
supplies where the same efficiency as the switcher can
be achieved without the cost and complexity associ-
ated with switching regulators. One such application is
the new graphic chipsets that requires 2.7V supply such
as the Intel I740 chipset.
5-PIN PLASTIC
IRU1175CP
ADJUSTABLE REGULATOR
R1
100
1%
R2
124
1%
8-PIN PLASTIC
IRU1175CS
SOIC (S)
PRELIMINARY DATASHEET
100uF
C3
2.7V
IRU1175
2-79

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IRU1175CP Summary of contents

Page 1

... Intel I740 chipset. C1 100uF 5 Vin Vctrl 4 Vout 3 Adj 2 Vsense 1 C2 10uF Typical application of IRU1175 5-PIN PLASTIC 5-PIN PLASTIC TO-263 (M) ULTRA THIN-PAK (P) IRU1175CM IRU1175CP IRU1175 PRELIMINARY DATASHEET 2.7V R1 100 C3 1% 100uF R2 124 1% 8-PIN PLASTIC SOIC (S) IRU1175CS 2-79 ...

Page 2

IRU1175 ABSOLUTE MAXIMUM RATINGS Input Voltage ( ................................................. Control Input Voltage (V ctrl ) ....................................... 14V Power Dissipation..................................................... Storage Temperature Range ...................................... Operating Junction Temperature Range ...................... PACKAGE INFORMATION 8-PIN PLASTIC SOIC ( S ) TOP VIEW Vctrl ...

Page 3

ELECTRICAL SPECIFICATIONS PARAMETER SYM Control Pin Current Adjust Pin Current Iadj Note 1: Low duty cycle pulse testing with Kelvin con- nections are required in order to maintain accurate data. Note 2: Dropout voltage is defined as the minimum dif- ...

Page 4

IRU1175 BLOCK DIAGRAM Vin Vctrl CURRENT LIMIT THERMAL SHUTDOWN APPLICATION INFORMATION Introduction The IRU1175 adjustable regulator is a five-terminal de- vice designed specificaly to provide extremely low drop- out voltages comparable to the PNP type without the disadvantage of the ...

Page 5

The IRU1175 keeps a constant 1.25V between the Vsense pin and the V adj pin. By placing a resistor R1 across these two pins and connecting the V sense and V out pin together, a constant current flows through R1, ...

Page 6

IRU1175 2-84 Notes Rev. 1.2 11/29/99 ...

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