IRU3033CS International Rectifier, IRU3033CS Datasheet

IC CTRL/REG PWM SWITCH 8-SOIC

IRU3033CS

Manufacturer Part Number
IRU3033CS
Description
IC CTRL/REG PWM SWITCH 8-SOIC
Manufacturer
International Rectifier
Datasheet

Specifications of IRU3033CS

Applications
Controller, Intel Pentium®, II, P55C
Voltage - Input
12V
Number Of Outputs
1
Voltage - Output
2 ~ 3.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*IRU3033CS
IRU3033-CS
IRU3033-CS

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
IRU3033CS
Manufacturer:
IR
Quantity:
20 000
Part Number:
IRU3033CSDTR
Manufacturer:
IR
Quantity:
20 000
Part Number:
IRU3033CSTR
Manufacturer:
EZ
Quantity:
1
Part Number:
IRU3033CSTR
Manufacturer:
IR
Quantity:
20 000
FEATURES
APPLICATIONS
TYPICAL APPLICATION
Figure 1 - Typical application of IRU3033 in a flexible mother board designed for Intel P55 , P54 , AMD K5, K6
Notes: P54C, P55C, Pentium II are trademarks of Intel Corp. K5 & K6 are trademarks of AMD Corp. Cyrix 6X86L, M1, M2 are trademarks of
Cyrix Corp. Power PC is trademark of IBM Corp.
12V
LDO Controller allows the use of a low cost pass
transistor for the I/O supply
8-Pin SOIC combines switching and linear
controller
Internal pre-regulator eliminates cross talk
between switching and linear regulators
Automatic shut down of the linear regulator when
connected to the Vcc2 detect pin
On-Board MOSFET Driver
Fastest transient response of any controller
method (0 to 100% Duty Cycle in 100ns)
1% Internal Voltage Reference
Internal Under-Voltage Lockout protects MOSFET
during start-up
Dual supply low voltage processor applications,
such as: P55C , CYRIX M2 , POWER PC
and AMD K6
Simple 5V to 3.3V switcher for Pentium with AGP
or Pentium II applications
5V
T
0 To 70
A
(°C)
Cyrix M1 and M2 applications.
L1
Basic Part (Non-Lead Free)
R9
C2
8-PIN PLASTIC SOIC (S)
8-PIN PWM SWITCHER AND LINEAR CONTROLLER IC
C8
Q2
C1
C3
IRU3033CS
Drv1
V
PACKAGE ORDER INFORMATION
12(SW)
V
12
IRU3033
Drv2
V
Q1
FB1
D1
V
R10
V
FB2
Gnd
HYST
R3
www.irf.com
C5
DESCRIPTION
The IRU3033 IC combines a switching controller and a
linear regulator controller all in a compact 8-pin surface
mount package, providing a total solution for dual sup-
ply processor applications such as an Intel P55C , AMD
K6 , as well as Cyrix 6X86L
sors. Typically in these applications a dual supply regu-
lator converts 5V to 3.3V for I/O supply and a jumper
programmable supply of 1.25V to 3.5V for Core supply.
The linear regulator controller portion in the IRU3033 is a
programmable controller allowing flexibility for the I/O
regulator and has a minimum of 50mA drive current ca-
pability designed to provide ample current for an exter-
nal pass transistor. The IC uses an internal regulator
generated from the 12V supply to power the controller
as well as the 12V supply to drive the power MOSFET,
allowing a low cost N-channel MOSFET switch to be
used. The IC also includes an error comparator for fast
transient response, a precise voltage reference for set-
ting the output voltage as well as a direct drive of the
MOSFET for the minimum part count.
D2
T
0 To 70
L2
A
(°C)
R6
R7
R4
R5
C6
8-PIN PLASTIC SOIC (S)
Leadfree Part
Data Sheet No. PD94147revA
IRU3033CSPbF
R8
C7
5V
IRU3033(PbF)
and the M2
Vcc2 Det
Core
I/O
CPU
as well as
proces-
1

Related parts for IRU3033CS

IRU3033CS Summary of contents

Page 1

... MOSFET for the minimum part count. R10 FB2 Gnd V FB1 HYST (° www.irf.com Data Sheet No. PD94147revA IRU3033(PbF) and the M2 proces- C6 I/O 5V CPU R8 Vcc2 Det Core well as Leadfree Part 8-PIN PLASTIC SOIC (S) IRU3033CSPbF 1 ...

Page 2

IRU3033(PbF) ABSOLUTE MAXIMUM RATINGS V ,V Supply Voltages ....................................... 12 12(SW) Fb Pin Voltages ........................................................ -0. Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature ................................ PACKAGE INFORMATION 8-PIN PLASTIC SOIC (S) TOP VIEW Drv1 V 1 ...

Page 3

PIN DESCRIPTIONS PIN # PIN SYMBOL PIN DESCRIPTION 1 Drv1 The PWM output of the switching controller. This pin is a totem pole drive that is con- nected to the gate of the power MOSFET. A resistor may be placed ...

Page 4

IRU3033(PbF) TYPICAL APPLICATION Pentium Dual Supply Application R10 R9 12V V Drv2 Drv1 V V 12(SW) FB1 Figure 3 - Typical application of IRU3033 in a ...

Page 5

... R4A and R4B. Note 1: For the applications where it is desirable to eliminate the heat sink, the IRL3103S for Q2 and MBR1545CT for D2 in TO-263 packages with minimum of 1" square copper pad can be used. Qty Part # 1 IRU3033CS (8-Pin SOIC) 1 MTP3055 (TO-220) 1 IRL3303 (TO-220) IRL3103S (TO-263) (Note 1) ...

Page 6

IRU3033(PbF) TYPICAL APPLICATION 5V to 3.3V for Pentium Application with AGP or Pentium II Application without ATX power supply Dual mode Operation between Switching or Linear mode. R9 12V C8 R10 R1A R1B Figure 4 ...

Page 7

... Heat Sink Note 1: For the applications where it is desirable to eliminate the heat sink, the IRL3103S for Q2 and MBR1545CT for D2 in TO-263 packages with minimum of 1" square copper pad can be used. Part # 1 IRU3033CS (8-Pin SOIC) 1 IRL3303 (TO-220) IRL3103S (TO-263) (Note 1) 1 MBR1045CT (TO-220) ...

Page 8

... FB2 U1 Gnd V V FB1 HYST Qty Part # 1 IRU3033CS (8-Pin SOIC) 1 IRL3303 (TO-220) IRL3103S (TO-263) (Note 1) 1 MBR1045CT (TO-220) MBRB1545CT (TO-263) (Note 1) 1 Core: T50-18, L=4µH Turns: 10T, 18 AWG 1 L=2µH 1 22Ω, 5%, SMT 1206 size 1 10Ω, 5%, SMT 0805 size 1 10Ω ...

Page 9

APPLICATION INFORMATION Introduction The IRU3033 device is an application specific product designed to provide an on board dual supply for the new generation of microprocessors requiring separate Core and I/O supplies. One of the processors fitting this re- quirement is ...

Page 10

IRU3033(PbF) For example, if Rt=1K and R =422K, then the output B ripple is: ∆Vo = (1/422)×11 = 26mV The advantage of fixed output ripple is that when the output voltage changes from 2V to 3.5V, the ripple volt- age ...

Page 11

SOIC Package 8-Pin Surface Mount, Narrow Body PIN NO. 1 0.38 ± 0.015 SYMBOL NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. H DETAIL-A ...

Page 12

IRU3033(PbF) PACKAGE SHIPMENT METHOD PKG PACKAGE DESIG DESCRIPTION S SOIC, Narrow Body IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 12 PIN PARTS COUNT PER TUBE Feed Direction Figure ...

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