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IRU3034CSPBF

Description
8-PIN PWM SWITCHER CONTROLLER IC WITH CURRENT LIMITING
CategoryPower/power management    The power supply circuit   
File Size147KB,12 Pages
ManufacturerInternational Rectifier ( Infineon )
Websitehttp://www.irf.com/
Environmental Compliance
Download Datasheet Parametric Compare View All

IRU3034CSPBF Overview

8-PIN PWM SWITCHER CONTROLLER IC WITH CURRENT LIMITING

IRU3034CSPBF Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerInternational Rectifier ( Infineon )
Parts packaging codeSOIC
package instructionSOP, SOP8,.25
Contacts8
Reach Compliance Codeunknow
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Nominal input voltage12 V
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length4.89 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.72 mm
surface mountYES
Switch configurationSINGLE
technologyBICMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.9 mm
Data Sheet No. PD94148 revA
IRU3034 & (PbF)
8-PIN PWM SWITCHER CONTROLLER IC
WITH CURRENT LIMITING
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.
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
C8
SS
CS+
CS-
C6
Drv
IRU3034
Gnd
12V
R1
L1
V
12
V
FB
V
HYST
C3
R3
C5
L2
R8
R7
R6
C7
V
OUT
5V
C1
C2
Q2
C4
R2
D1
R4
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
T
A
(°C)
0 To 70
Basic Device Leadfree Device
IRU3034CS
IRU3034CS(PbF)
Parts per
Tube
8-Pin Plastic SOIC(S)
95
www.irf.com
Package
Parts per
Reel
2500
T&R
Orientation
see
Fig. A
1

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