IRU1150 International Rectifier Corp., IRU1150 Datasheet

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IRU1150

Manufacturer Part Number
IRU1150
Description
Manufacturer
International Rectifier Corp.
Datasheet

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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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IRU1150 Summary of contents

Page 1

... Dropout at 4A Fast Transient Response 1% Voltage Reference Initial Accuracy Built-In Thermal Shutdown APPLICATIONS 3.3V to 2.7V Intel I740 Chip Set TYPICAL APPLICATION 3.3V IRU1150 V 5V Figure 1 - Typical application of IRU1150 in a 3.3V to 2.7V for I740 chip. PACKAGE ORDER INFORMATION T (°C) 5-PIN PLASTIC J TO-263 ( 125 IRU1150CM Rev. 1.6 03/18/02 4A ULTRA LOW DROPOUT POSITIVE ...

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 TO-263 (M) FRONT VIEW Tab is CTRL OUT OUT Adj ...

Page 3

... Typically the resistor dividers are selected such that it automatically main- tains this current. pin and ground sets the output voltage. OUT pin in order for the device to OUT www.irf.com IRU1150 in OUT 3 ...

Page 4

... Output Voltage Setting The IRU1150 can be programmed to any voltages in the range of 1.25V to 5.5V with the addition of R1 and R2 external resistors according to the following formula: R ...

Page 5

... Load Regulation Since the IRU1150 has separate pins for the output (V and the sense ( ideal for providing true re- SENSE mote sensing of the output voltage at the load. This ...

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 03/18/02 ...

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