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IRU3038CS

Description
SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS
CategoryPower/power management    The power supply circuit   
File Size132KB,18 Pages
ManufacturerInternational Rectifier ( Infineon )
Websitehttp://www.irf.com/
Download Datasheet Parametric Compare View All

IRU3038CS Overview

SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS

IRU3038CS Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerInternational Rectifier ( Infineon )
Parts packaging codeSOIC
package instructionSOP, SOP14,.25
Contacts14
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage12 V
Minimum input voltage4.15 V
Nominal input voltage5 V
JESD-30 codeR-PDSO-G14
JESD-609 codee0
length8.65 mm
Humidity sensitivity level3
Number of functions1
Number of terminals14
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current0.5 A
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP14,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)245
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency440 kHz
technologyBIPOLAR
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.9 mm
Data Sheet No. PD94250
IRU3038
SYNCHRONOUS PWM CONTROLLER
FOR TERMINATION POWER SUPPLY APPLICATIONS
PRELIMINARY DATA SHEET
FEATURES
Synchronous Controller in 14-Pin Package
Operating with single 5V or 12V supply voltage
200KHz to 400KHz operation set by an external
resistor
Soft-Start Function
Fixed Frequency Voltage Mode
500mA Peak Output Drive Capability
Uncommitted Error Amplifier available for DDR
voltage tracking application
1.25V Reference Voltage
Protects the output when control FET is shorted
DESCRIPTION
The IRU3038 controller IC is designed to provide a low
cost synchronous Buck regulator for voltage tracking
applications such DDR memory and general purpose
on-board DC to DC converter. Modern micro processors
combined with DDR memory, need high-speed bandwidth
data bus which requires a particular bus termination volt-
age. This voltage will be tightly regulated to track the
half of chipset voltage for best performance. The IRU3038
together with dual N-channel MOSFETs such as IRF7313,
provide a low cost solution for such applications. This
device features a programmable frequency set from
200KHz to 400KHz, under-voltage lockout for both Vcc
and Vc supplies, an external programmable soft-start
function as well as output under-voltage detection that
latches off the device when an output short is detected.
APPLICATIONS
DDR memory source sink Vtt application
Low cost on-board DC to DC such as
5V to 3.3V, 2.5V or 1.8V
Graphic Card
Hard Disk Drive
TYPICAL APPLICATION
5V
12V
V
DDQ
(2.5V)
C1
0.1uF
C2
1uF
C3
10TPB100M,
100uF, 55m
V
L1
1uH
C4
47uF
DDR
Memory
R1
1K
R2
1K C5
0.1uF
Vcc
V
REF
V
P
SS
Vc
HDrv
D1
BAT54
or 1N4148
Q1
1/2 of IRF7313
L2
Vtt
1.25V @ 3A
C6
2x 6TPB150M,
150uF, 55m
V
U1
IRU3038
LDrv
PGnd
Fb
Gnd
D03316P-103, 10uH, 3.9A
Q2
1/2 of IRF7313
Rt
Comp
C7
2200pF
R3
33K
Figure 1 - Typical application of IRU3038 when Vtt tracks the V
DDQ
.
PACKAGE ORDER INFORMATION
T
A
(°C)
0 To 70
0 To 70
Rev. 2.0
09/12/02
DEVICE
IRU3038CF
IRU3038CS
PACKAGE
14-Pin Plastic TSSOP (F)
14-Pin Plastic SOIC NB (S)
www.irf.com
1

IRU3038CS Related Products

IRU3038CS IRU3038 IRU3038CF
Description SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS
Is it Rohs certified? incompatible - incompatible
Maker International Rectifier ( Infineon ) - International Rectifier ( Infineon )
Parts packaging code SOIC - TSSOP
package instruction SOP, SOP14,.25 - TSSOP, TSSOP14,.25
Contacts 14 - 14
Reach Compliance Code compliant - compli
ECCN code EAR99 - EAR99
Analog Integrated Circuits - Other Types SWITCHING CONTROLLER - SWITCHING CONTROLLER
control mode VOLTAGE-MODE - VOLTAGE-MODE
Control Technology PULSE WIDTH MODULATION - PULSE WIDTH MODULATION
Maximum input voltage 12 V - 12 V
Minimum input voltage 4.15 V - 4.15 V
Nominal input voltage 5 V - 5 V
JESD-30 code R-PDSO-G14 - R-PDSO-G14
JESD-609 code e0 - e0
length 8.65 mm - 5 mm
Humidity sensitivity level 3 - 3
Number of functions 1 - 1
Number of terminals 14 - 14
Maximum operating temperature 70 °C - 70 °C
Maximum output current 0.5 A - 0.5 A
Package body material PLASTIC/EPOXY - PLASTIC/EPOXY
encapsulated code SOP - TSSOP
Encapsulate equivalent code SOP14,.25 - TSSOP14,.25
Package shape RECTANGULAR - RECTANGULAR
Package form SMALL OUTLINE - SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 245 - NOT SPECIFIED
Certification status Not Qualified - Not Qualified
Maximum seat height 1.75 mm - 1.2 mm
surface mount YES - YES
Switch configuration PUSH-PULL - PUSH-PULL
Maximum switching frequency 440 kHz - 440 kHz
technology BIPOLAR - BIPOLAR
Temperature level COMMERCIAL - COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) - Tin/Lead (Sn/Pb)
Terminal form GULL WING - GULL WING
Terminal pitch 1.27 mm - 0.65 mm
Terminal location DUAL - DUAL
Maximum time at peak reflow temperature 30 - NOT SPECIFIED
width 3.9 mm - 4.4 mm
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