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PDF IRU3033 Data sheet ( Hoja de datos )
| Número de pieza | IRU3033 | |
| Descripción | 8-PIN PWM SWITCHER AND LINEAR CONTROLLER IC | |
| Fabricantes | International Rectifier | |
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( DataSheet : www.DataSheet4U.com )
Data Sheet No. PD94147
IRU3033
8-PIN PWM SWITCHER AND LINEAR CONTROLLER IC
FEATURES
DESCRIPTION
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
APPLICATIONS
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
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™ and the M2™ proces-
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.
TYPICAL APPLICATION
Q1
5V
C1 R10
12V
R9
C8
V12 Drv2 VFB2
IRU3033
Drv1
Gnd
V12(SW) VFB1 VHYST
R6
C6 I/O
D2 R7
5V
CPU
R8
Vcc2 Det
C3
L1
R3 C5
L2
R4
Core
Q2
C2
D1
R5
Figure 1 - Typical application of IRU3033 in a flexible mother board designed for
Intel P55™ , P54™ , AMD K5, K6™ as well as Cyrix M1™ and M2™ applications.
C7
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.
PACKAGE ORDER INFORMATION
TA (°C)
0 To 70
8-PIN PLASTIC SOIC (S)
IRU3033CS
Rev. 1.7
07/17/02
www.irf.com
1
www.DataSheet4U.com
1 page  
IRU3033
APPLICATION PARTS LIST
Pentium Dual Supply
Ref Desig Description
Qty
Part #
U1 LDO/Switcher IC 1 IRU3033CS (8-Pin SOIC)
Q1 MOSFET
1 MTP3055 (TO-220)
Q2 MOSFET
1 IRL3303 (TO-220)
IRL3103S (TO-263) (Note 1)
D2 Diode, GP
1 1N4148
D1
Schottky Diode
1 MBR1045CT (TO-220)
MBRB1545CT (TO-263) (Note1)
L2 Inductor
1 Core: T50-18, L=4mH
Turns: 10T, 18 AWG
L1 Inductor
1 L=2mH
R1 Resistor
1 22V, 5%, SMT 1206 size
R2 Resistor
1 10V, 5%, SMT 1206 size
R3 Resistor
1 324KV, 1%, SMT 0805 size
R4A*
Resistor
1 806V, 1%, SMT 0805 size
R4B*
Resistor
1 90.9KV, 1%, SMT 0805 size
R5A Resistor
1 1.24KV, 1%, SMT 0805 size
R5B Resistor
1 2.49KV, 1%, SMT 0805 size
R5C
Resistor
1 4.99KV, 1%, SMT 0805 size
R5D
Resistor
1 1KV, 1%, SMT 0805 size
R5E Resistor
1 1.30KV, 1%, SMT 0805 size
R6 Resistor
1 2 KV, 1%, SMT 0805 size
R7 Resistor
1 1.21KV,1%, SMT 0805 size
R8 Resistor
1 1 KV, 5%, SMT 0805 size
R9 Resistor
1 10V, 5%, SMT 0805 size
R10 Resistor
1 1KV, 5%, SMT 0805 size
R11 Resistor
1 2.4KV, 5%, SMT 0805 size
R13 Resistor
1 7.5KV, 5%, SMT 0805 size
C1 Capacitor
1 6MV1500GX, 1500µF, 6.3V, Elect
C2 Capacitor
1 6MV1500GX, 1500µF, 6.3V, Elect
C3 Capacitor
1 1mF, Ceramic, SMT 0805 size
C4 Capacitor
1 470pF, Ceramic, SMT 0805 size
C5 Capacitor
1 10pF, Ceramic, SMT 0805 size
C6 Capacitor
1 6MV1500GX, 1500mF, 6.3V, Elect
C7 Capacitor
4 6MV1500GX, 1500mF, 6.3V, Elect
C8 Capacitor
1 1mF, Ceramic, SMT 0805 size
C9 Capacitor
1 470p, Ceramic, SMT 0805 size
HS1 Heat Sink
1 For MOSFET, 577002
HS2 Heat Sink
1 For Schottky Diode , 577002
HS3 Heat Sink
1 For Q1, 507222 (I/O curren<5A)
576602 (I/O current< 3.5A)
*R4 is a parallel combination of R4A and R4B.
Manuf
IR
Motorola
IR
Motorola
Micro Metal
(core)
Sanyo
Sanyo
Sanyo
Sanyo
Sanyo
Aavid
Aavid
Aavid
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.
Rev. 1.7
07/17/02
www.irf.com
5
5 Page 
(S) SOIC Package
8-Pin Surface Mount, Narrow Body
A
B
C
H
IRU3033
E
PIN NO. 1
D
TF
DETAIL-A
0.386 0.015 x 458
K
L
DETAIL-A
I
J
G
8-PIN
SYMBOL MIN
A 4.80
MAX
4.98
B 1.27 BSC
C 0.53 REF
D 0.36 0.46
E 3.81 3.99
F 1.52 1.72
G 0.10 0.25
H 78 BSC
I 0.19 0.25
J 5.80 6.20
K 08 88
L 0.41 1.27
T 1.37 1.57
NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS.
Rev. 1.7
07/17/02
www.irf.com
11
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| PDF Descargar | [ Datasheet IRU3033.PDF ] | |
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