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IRU3048CF-IRU3048CS
Dual Synchronous PWM Controller with Current sharing Circuitry and LDO Controller
Data Sheet No.PD94253
IRU3048
International
TOR Rectifier
DUAL SYNCHRONOUS PWM CONTROLLER
CIRCUITRY AND LDO CONTROLLER
PRELIMINARY DATA SHEET
FEATURES DESCRIPTION
El Dual Synchronous Controller in 16-Pin Package The IRU3048 IC combines a Dual synchronous Buck
with 180° out-of-phase operation controller and a linear regulator controller, providing a
El LDO Controller with 40mA drive cost-effective, high performance and flexible solution for
D Configured as 2-lndependent PWM Controller multi-output applications. The Dual synchronous con-
Cl Flexible, Same or Separate Supply Operation troller is configured as 2-independent PWM controller.
ta Operation from 4V to 25V Input IRU3048 provides a separate adjustable output by driv-
IZI Internal 200KHz Oscillator ing a switch as a linear regulator. This device features an
El Soft-Start controls all outputs internal 200KHz oscillator, under-voltage lockout for all
El Fixed Frequency Voltage Mode input supplies, an external programmable soft start func-
D 500mA Peak Output Drive Capability tion as well as output under-voltage detection that latches
D Programmable Outputs off the device when an output short is detected.
APPLICATIONS
El DDR Memory Source Sink Vtt Application
El Graphic Card
EI Hard Disk Drive
El Power supplies requiring multiple outputs
l YPICAL APPLICATION
VcH1 VCH2 r-
v HDrv1 :: 02 L1
3.3V ' Q1 I LDrv1 :E Q3
Cl til Voum
T _ RI U1 PGnd =--
VCUT3\ ttt - Fb3
'__ c2 ' IRU3048
T T F-s/il- Comp1 Fb2
C4 R4 Comp2 HDrv2 [r-Cot L
T LDrv2 {E 05
I ss Gnd
T 1 s T
Figure 1 - Typical application of IRU3048 configured as 2-independent converter.
PACKAGE ORDER INFORMATION
Two) DEVICE PACKAGE
0 To 70 IRU3048CF 16-Pin TSSOP (F)
0 To 70 IRU3048CS 16-Pin SOIC NB (S)
Rev. 1.7 1
09I12I02
International
IRU3048 TOR Rectifier
ABSOLUTE MAXIMUM RATINGS
Vcc Supply Voltage ..................................................
VcH1=VcH2 Supply Voltage ......................................
Storage Temperature Range ......................................
Operating Junction Temperature Range .....................
PACKAGE INFORMATION
30V (not rated for inductive load)
-65°C To 150°C
0°C To 125°C
16-PIN PLASTIC TSSOP (F) 16-PIN PLASTIC SOIC NB (S)
TOP VIEW TOP VIEW
Gnd l: q E Ftal GndlI E Fta1
szlZ El ss WE Elss
CommE E Fb3 Comp1E EH33
Comple 1:3] VOUT3 Comple EVOUTa
Vd-IZE 1:2] VcH1 VcHzE ENS-il
HDn/ZE E] HDrv1 HDn/zlE EHDM
LIAU E E LDrv1 LIAu E E LDN1
PGndE El Vcc PGndE EIVoc
6JA=90°CIW 6JA=85°CNV
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Vcc=5V, VcH1=VcH2=12V, 'le=0 to 70°C. Typical
values refer to TA=25°C. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to
the ambient temperature.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Reference Voltage
Fb Voltage VFB 1.225 1.250 1.275 V
Fb Voltage Line Regulation LREG 5
UVLO Threshold - Vcc UVLOVcc Supply Ramping Up 4.2 V
UVLO Hysteresis - Vcc 0.25 V
UVLO Threshold - VcH1 UVLOVcH1 Supply Ramping Up 3.5 V
UVLO Hysteresis - VcH1 0.2 V
UVLO Threshold - VcH2 UVLOVcH2 Supply Ramping Up 3.5 V
UVLO Hysteresis - VcH2 0.2 V
UVLO Threshold - Fb UVLOFB Fb Ramping Down 0.6 V
UVLO Hysteresis - Fb 0.1 V
Supply Current
Vcc Dynamic Supply Current Dyn Icc Freq=200KHz, CL=1500pF 5 mA
VcH1 Dynamic Supply Current Dyn ch1 Freq=200KHz, CL=1500pF 7 mA
VcH2 Dynamic Supply Current Dyn LH2 Freq=200KHz, CL=15OOpF 7 mA
Vcc Static Supply Current Icco SS=0V 3.5 mA
VcH1 Static Supply Current ch1Q SS=0V 2 mA
VcH2 Static Supply Current lcH2Q SS=OV 2 mA
Soft-Start Section
Charge Current SSIB SS=0V 15 25 30 wA
Rev. 1.7
09I12I02
