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IRU3048CS Datasheet

  • IRU3048CS

  • DUAL SYNCHRONOUS PWM CONTROLLER CIRCUITRY AND LDO CONTROLLER

  • 18頁

  • IRF

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Data Sheet No.PD94253
IRU3048
DUAL SYNCHRONOUS PWM CONTROLLER
CIRCUITRY AND LDO CONTROLLER
PRELIMINARY DATA SHEET
FEATURES
Dual Synchronous Controller in 16-Pin Package
with 1808 out-of-phase operation
LDO Controller with 40mA drive
Configured as 2-Independent PWM Controller
Flexible, Same or Separate Supply Operation
Operation from 4V to 25V Input
Internal 200KHz Oscillator
Soft-Start controls all outputs
Fixed Frequency Voltage Mode
500mA Peak Output Drive Capability
Programmable Outputs
DESCRIPTION
The IRU3048 IC combines a Dual synchronous Buck
controller and a linear regulator controller, providing a
cost-effective, high performance and flexible solution for
multi-output applications. The Dual synchronous con-
troller is configured as 2-independent PWM controller.
IRU3048 provides a separate adjustable output by driv-
ing a switch as a linear regulator. This device features an
internal 200KHz oscillator, under-voltage lockout for all
input supplies, an external programmable soft start func-
tion 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
Graphic Card
Hard Disk Drive
Power supplies requiring multiple outputs
TYPICAL APPLICATION
12V
5V
VcH1
Vcc
3.3V
C1
R1
V
OUT3
C2
R2
C3
R3
Comp1
R4
Comp2
Fb3
VcH2
HDrv1
Q2
L1
V
OUT1
Q1
V
OUT3
LDrv1
Q3
C6
U1
IRU3048
PGnd
R5
Fb1
Fb2
HDrv2
Q4
L2
V
OUT2
LDrv2
Q5
R7
C7
R6
C4
SS
C5
Gnd
R8
Figure 1 - Typical application of IRU3048 configured as 2-independent converter.
PACKAGE ORDER INFORMATION
T
A
(擄C)
0 To 70
0 To 70
Rev. 1.7
09/12/02
DEVICE
IRU3048CF
IRU3048CS
www.irf.com
PACKAGE
16-Pin TSSOP (F)
16-Pin SOIC NB (S)
1

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