IRU3048CS

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 controller is configured as 2-independent PWM controller. IRU3048 provides a separate adjustable output by driving 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 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 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 VOUT1 Q1 VOUT3 LDrv1 Q3 C6 U1 IRU3048 PGnd R5 Fb1 Fb2 HDrv2 Q4 L2 VOUT2 LDrv2 Q5 R7 C7 R6 C4 SS C5 Gnd R8 Figure 1 - Typical application of IRU3048 configured as 2-independent converter. PACKAGE ORDER INFORMATION TA (°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 IRU3048 ABSOLUTE MAXIMUM RATINGS Vcc Supply Voltage .................................................. VcH1=VcH2 Supply Voltage ...................................... Storage Temperature Range ...................................... Operating Junction Temperature Range ..................... 25V 30V (not rated for inductive load) -65°C To 150°C 0°C To 125°C PACKAGE INFORMATION 16-PIN PLASTIC TSSOP (F) TOP VIEW 16-PIN PLASTIC SOIC NB (S) TOP VIEW Gnd 1 Fb2 2 Comp1 3 Comp2 4 VcH2 5 HDrv2 6 LDrv2 7 PGnd 8 16 Fb1 15 SS 14 Fb3 13 VOUT3 12 VcH1 11 HDrv1 10 LDrv1 9 Vcc Gnd 1 Fb2 2 Comp1 3 Comp2 4 VcH2 5 HDrv2 6 LDrv2 7 PGnd 8 16 Fb1 15 SS 14 Fb3 13 VOUT3 12 VcH1 11 HDrv1 10 LDrv1 9 Vcc uJA=908C/W uJA=858C/W ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over Vcc=5V, VcH1=VcH2=12V, T =0 to 70°C. Typical A 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 Reference Voltage Fb Voltage Fb Voltage Line Regulation UVLO UVLO Threshold - Vcc UVLO Hysteresis - Vcc UVLO Threshold - VcH1 UVLO Hysteresis - VcH1 UVLO Threshold - VcH2 UVLO Hysteresis - VcH2 UVLO Threshold - Fb UVLO Hysteresis - Fb Supply Current Vcc Dynamic Supply Current VcH1 Dynamic Supply Current VcH2 Dynamic Supply Current Vcc Static Supply Current VcH1 Static Supply Current VcH2 Static Supply Current Soft-Start Section Charge Current SYM VFB LREG TEST CONDITION MIN 1.225 5