IRU1150CP IRF [International Rectifier], IRU1150CP Datasheet

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IRU1150CP

Manufacturer Part Number
IRU1150CP
Description
4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
Manufacturer
IRF [International Rectifier]
Datasheet
FEATURES
APPLICATIONS
TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
Rev. 1.6
03/18/02
0.7V Dropout at 4A
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-In Thermal Shutdown
3.3V to 2.7V Intel I740 Chip Set
0 To 125
T
IRU1150
J
Figure 1 - Typical application of IRU1150 in a 3.3V to 2.7V for I740 chip.
(°C)
3.3V
5V
5-PIN PLASTIC
IRU1150CM
TO-263 (M)
V
V
SENSE
V
C T R L
O U T
Adj
V
100uF
IN
C1
5
4
3
2
1
4A ULTRA LOW DROPOUT POSITIVE
www.irf.com
Ultra Thin-Pak
C2
100uF
5-PIN PLASTIC
IRU1150CP
DESCRIPTION
The IRU1150 is a 4A 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 2.8V or lower voltages from 3.3V ATX power supplies
where high efficiency of a switcher can be achieved with-
out the cost and complexity associated with switching
regulators. One such application is the new graphic chip
sets that require anywhere from 2.4V to 2.7V supply
such as the Intel I740 chip set.
ADJUSTABLE REGULATOR
TM
(P)
8-PIN PLASTIC
R1
102
R2
118
IRU1150CS
SOIC (S)
Data Sheet No. PD94129
C3
100uF
2.7V
IRU1150
1

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IRU1150CP Summary of contents

Page 1

... One such application is the new graphic chip sets that require anywhere from 2.4V to 2.7V supply such as the Intel I740 chip set. C1 100uF Adj 1 SENSE C2 100uF 5-PIN PLASTIC TM Ultra Thin-Pak (P) IRU1150CP www.irf.com Data Sheet No. PD94129 IRU1150 2.7V R1 102 C3 100uF R2 118 8-PIN PLASTIC SOIC (S) IRU1150CS 1 ...

Page 2

IRU1150 ABSOLUTE MAXIMUM RATINGS Input Voltage (V ) .................................................... 7V IN Control Input Voltage (V ) ..................................... 14V CTRL Power Dissipation ..................................................... Internally Limited Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... PACKAGE INFORMATION 5-PIN PLASTIC ...

Page 3

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 between V and V required to maintain regu- IN OUT ...

Page 4

IRU1150 BLOCK DIAGRAM CTRL + CURRENT LIMIT THERMAL SHUTDOWN Figure 2 - Simplified block diagram of the IRU1150. APPLICATION INFORMATION Introduction The IRU1150 adjustable regulator is a five-terminal de- vice designed specifically to provide extremely ...

Page 5

The IRU1150 keeps a constant 1.25V between the V pin and the V pin. By placing a resistor R1 across ADJ these two pins and connecting the V together, a constant current flows through R1, adding to the Iadj current ...

Page 6

IRU1150 IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 6 Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 www.irf.com TAC Fax: (310) 252-7903 Rev. 1.6 ...

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