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PDF IRU3034 Data sheet ( Hoja de datos )
| Número de pieza | IRU3034 | |
| Descripción | 8-PIN PWM SWITCHER CONTROLLER IC | |
| Fabricantes | International Rectifier | |
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Data Sheet No. PD94148 revA
IRU3034 & (PbF)
8-PIN PWM SWITCHER CONTROLLER IC
WITH CURRENT LIMITING
FEATURES
8-Pin SOIC switching controller with
HICCUP current limiting reduces diode power
dissipation to less than 1% of normal operation
Soft-Start capacitor allows for smooth output
voltage ramp up
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
TYPICAL APPLICATION
DESCRIPTION
The IRU3034 IC provides a low cost switching controller
with true short circuit protection all in a compact 8-pin
surface mount package, providing a low cost switching
solution for dual supply processor applications that re-
quire switching regulator for the 3.3V supply such as
the applications with AGP on-board. Typically in these
applications, a dual supply regulator converts 5V to 3.3V
for I/O supply and a jumper programmable supply of
1.25V to 3.5V for Core supply. 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 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.
12V
5V
C8
R1
SS CS+ CS-
Drv IRU3034 Gnd
V12 VFB VHYST
C3
R3
L1
C1
Q2
C2
C4
R2
C5
D1
C6
R8 R7
L2 R6
R4
VOUT
C7
R5
Figure 1 - Typical application of IRU3034.
Notes: 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
Basic Device Leadfree Device
IRU3034CS IRU3034CS(PbF)
Package
Parts per
Tube
8-Pin Plastic SOIC(S) 95
Parts per
Reel
2500
T&R
Orientation
see
Fig. A
www.irf.com
1
1 page  
IRU3034 & (PbF)
PENTIUM CORE SUPPLY APPLICATION PARTS LIST
(IRU3034 and IRU3033 Dual Layout) Low Cost 4-Bit VID
Ref Desig Description Qty
U1 LDO/Switcher IC 1
Q2 MOSFET
1
D1 Schottky Diode 1
L2 Inductor
1
L1
R1
R2
R3
R4A *
R4B *
R5A
R5B
R5C
R5D
R5E
R6
R7
R8
R9
C1
C2
C3
C4
C5
C7
C8
C6
HS1
HS2
Inductor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Heat Sink
Heat Sink
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
1
1
1
1
Part #
IRU3034CS (8-Pin SOIC)
IRL3303 (TO-220)
IRL3103S (TO-263) (Note 1)
MBR1045CT (TO-220)
MBRB1545CT (TO-263) (Note1)
Core: T50-18, L=4µH
Turns: 10T, 18 AWG
L=2µH
22Ω, 5%, SMT 1206 size
10Ω, 5%, SMT 1206 size
324KΩ, 1%, SMT 0805 size
806Ω, 1%, SMT 0805 size
90.9KΩ, 1%, SMT 0805 size
1.24KΩ, 1%, SMT 0805 size
2.49KΩ, 1%, SMT 0805 size
4.99KΩ, 1%, SMT 0805 size
10KΩ, 1%, SMT 0805 size
1.30Ω, 1%, SMT 0805 size
5mΩ, 5%, 2W
4.99KΩ, 1%, SMT 0805 size
4.7KΩ, 5% for IRU3034, open for 3033
Open for IRU3034, 10Ω for IRU3033
6MV1500GX, 1500µF, 6.3V, Elect
6MV1500GX, 1500µF, 6.3V, Elect
1µF, Ceramic, SMT 0805 size
470pF, Ceramic, SMT 0805 size
10pF, Ceramic, SMT 0805 size
6MV1500GX, 1500µF, 6.3V, Elect
0.047µF for 3034 , 0.1µF for IRU3033
4700pF for IRU3034, open for IRU3033
For MOSFET, 577002
For Schottky Diode, 577002
*R4 is a parallel combination of R4A and R4B.
Manuf
IR
IR
Motorola
Micro Metal
(core)
Sanyo
Sanyo
Sanyo
Sanyo
Aavid
Aavid
Note: 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.
www.irf.com
5
5 Page 
IRU3034 & (PbF)
(S) SOIC Package
8-Pin Surface Mount, Narrow Body
A
B
C
H
E
PIN NO. 1
D
TF
DETAIL-A
0.38±0.015 x 45
K
L
DETAIL-A
I
GJ
8-PIN
SYMBOL MIN MAX
A 4.80 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 7 BSC
I 0.19 0.25
J 5.80 6.20
K 08
L 0.41 1.27
T 1.37 1.57
NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS.
www.irf.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet IRU3034.PDF ] | |
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