IR3503MTRPBF

IR3503 DATA SHEET XPHASE3TM CONTROL IC DESCRIPTION TM The IR3503 control IC combined with an XPHASE3 Phase IC provides a full featured and flexible way to implement a complete VR11.0 and VR11.1 power solution. The IR3503 provides overall system control TM and interfaces with any number of Phase ICs, each driving and monitoring a single phase. The XPhase3 architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. FEATURES • • • • • • • • • • • • • • • • • • • • • 1 to X phase operation with matching Phase IC 0.5% overall system set point accuracy Daisy-chain digital phase timing provides accurate phase interleaving without external components Programmable 250kHz to 9MHz clock oscillator frequency provides per phase switching frequency of 250kHz to 1.5MHz Programmable Dynamic VID Slew Rate Programmable VID Offset or No Offset Programmable Load Line Output Impedance High speed error amplifier with wide bandwidth of 30MHz and fast slew rate of 10V/us Programmable constant converter output current limit during soft start Hiccup over current protection with delay during normal operation Central over voltage detection and latch with programmable threshold and communication to phase ICs Over voltage signal output to system with overvoltage detection during powerup and normal operation Load current reporting capable of interfacing directly to the CPU Single NTC thermistor compensation for correct current reporting, OC Threshold, and Droop Detection and protection of open remote sense line Open control loop protection Programmable VRHOT function monitors temperature of power stage through a NTC thermistor Remote sense amplifier with true converter voltage sensing Simplified VR Ready (VRRDY) output provides indication of proper operation Small thermally enhanced 32L 5mm x 5mm MLPQ package RoHS Compliant ORDERING INFORMATION Device IR3503MTRPBF * IR3503MPBF • Package 32 Lead MLPQ (5 x 5 mm body) 32 Lead MLPQ (5 x 5 mm body) Order Quantity 3000 per reel 100 piece strips Samples only Page 1 of 39 February 12, 2010 IR3503 APPLICATION CIRCUIT +12V 12V PSI# PSI# VRRDY SHIFT RMON IIN IOUT CMON VCCL RMON1 CVCCL PHSIN VOSEN- PHSOUT 26 25 CLKOUT 27 PHSIN PHSOUT 28 VCCL 30 29 IIN SHIFT 31 VRRDY VID1 VN ENABLE VDRP 24 23 ROSC CSS/DEL 22 21 RVDAC 20 RSETPT 19 CVDAC VDAC RTCMP2 RTCMP3 18 17 RTHERM RTCMP1 16 9 VID0 EAOUT VDAC_BUFF FB 8 VID0 VSETPT VID2 VO 7 VID1 VID3 15 6 VID2 VDAC IR3503 VOSEN+ VID3 VID4 14 5 SS/DEL 13 VID4 VID5 VOSEN- 4 PSI# ROSC HOTSET VID5 VID6 12 3 VID7 VRHOT 2 VID6 11 VID7 EXPAD ENABLE 1 10 33 IMON 32 CLKOUT RDRP RTCMP3 RTCMP2 VRHOT RHOTSET1 RHOTSET3 RFB CFB RCP CCP EAOUT CHOTSET RFB1 CCP1 RHOTSET2 VOSEN+ VOSEN- Note: Pin 33 of IR3503 is the exposed pad located under the IC. It is connected to IC ground Figure 1: IR3503 Application Circuit Page 2 of 39 February 12, 2010 IR3503 IR3503 ERROR AMPLIFIER VDAC BUFFER AMPLIFIER EAOUT 1k + FB + VSETPT RVSETPT ISOURCE FAST VDAC VDAC RVDAC1 ISINK - IVDAC IVSETPT CVDAC1 IROSC ROSC BUFFER AMPLIFIER 0.6V LGND + IROSC CURRENT SOURCE GENERATOR ROSC ROSC1 VO REMOTE SENSE AMPLIFIER VOSEN+ EAOUT SYSTEM SET POINT VOSNSVOLTAGE + VOSEN- Figure 2: System set-point measurements Page 3 of 39 February 12, 2010 IR3503 ABSOLUTE MAXIMUM RATINGS Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. o Operating Junction Temperature……………..0 to 150 C o o Storage Temperature Range………………….-65 C to 150 C ESD Rating………………………………………HBM Class 1C JEDEC Standard MSL Rating………………………………………2 o Reflow Temperature…………………………….260 C PIN # PIN NAME VMAX VMIN ISOURCE ISINK 1-8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 VID7-0 ENABLE VRHOT HOTSET VOSENVOSEN+ VO FB EAOUT VDRP VN VDAC_BUFF VSETPT VDAC SS/DEL ROSC PSI# CLKOUT 7.5V 3.5V 7.5V 7.5V 1.0V 7.5V 7.5V 7.5V 7.5V 7.5V 7.5V 3.5V 3.5V 3.5V 7.5V 7.5V 7.5V 7.5V -0.3V -0.3V -0.3V -0.3V -0.5V -0.5V -0.5V -0.3V -0.3V -0.3V -0.3V -0.3V -0.3V -0.3V -0.3V -0.5V -0.3V -0.3V 1mA 1mA 1mA 1mA 5mA 5mA 35mA 1mA 35mA 35mA 1mA 1mA 1mA 1mA 1mA 1mA 1mA 100mA 1mA 1mA 50mA 1mA 1mA 1mA 5mA 1mA 5mA 1mA 1mA 35mA 1mA 1mA 1mA 1mA 1mA 100mA 26 27 28 PHSOUT PHSIN VCCL 7.5V 7.5V 7.5V -0.3V -0.3V -0.3V 10mA 1mA 1mA 10mA 1mA 20mA 29 IIN 7.5V -0.3V 1mA 1mA 30 SHIFT 7.5V -0.3V 1mA 1mA 31 VRRDY VCCL + 0.3V -0.3V 1mA 20mA 32 IMON 3.5V -0.3V 25mA 1mA 33 EXPAD n/a n/a 50mA 1mA Page 4 of 39 February 12, 2010 IR3503 ELECTRICAL SPECIFICATIONS o Unless otherwise specified, these specifications apply over: 4.75 V