ISL6313BIRZ Renesas

DATASHEET ISL6313B FN6809 Rev 0.00 Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for Intel VR11 November 6, 2008 and AMD Applications The ISL6313B two-phase PWM control IC provides a Features precision voltage regulation system for advanced Integrated Multi-Phase Power Conversion microprocessors. The integration of power MOSFET drivers - 2-Phase or 1-Phase Operation with Internal Drivers into the controller IC marks a departure from the separate PWM controller and driver configuration of previous Precision Core Voltage Regulation multi-phase product families. By reducing the number of - Differential Remote Voltage Sensing external parts, this integration is optimized for a cost and - 0.5% System Accuracy Over Temperature space saving power management solution. - Adjustable Reference-Voltage Offset One outstanding feature of this controller IC is its Optimal Transient Response multiprocessor compatibility, allowing it to work with both Intel - Active Pulse Positioning (APP) Modulation and AMD microprocessors. Included are programmable VID - Adaptive Phase Alignment (APA) codes for Intel VR11 as well as AMD 5-bit and 6-bit DAC tables. Fully Differential, Continuous DCR Current Sensing A circuit is provided for remote voltage sensing, compensating - Integrated Programmable Current Sense Resistors for any potential difference between remote and local grounds. - Accurate Load Line Programming The output voltage can also be positively or negatively offset - Precision Channel Current Balancing through the use of a single external resistor. Variable Gate Drive Bias: 5V to 12V The ISL6313B also includes advanced control loop features for optimal transient response to load apply and removal. Multi-Processor Compatible One of these features is highly accurate, fully differential, - Intel VR11 Mode of Operation continuous DCR current sensing for load line programming - AMD Mode of Operation and channel current balance. Active Pulse Positioning (APP) Microprocessor Voltage Identification Inputs Modulation and Adaptive Phase Alignment (APA) are two - 8-Bit DAC other unique features, allowing for quicker initial response to - Selectable between Intel VR11, AMD 5-bit, and AMD high di/dt load transients. With this quicker initial response to 6-bit DAC tables load transients, the number of output bulk capacitors can be - Dynamic VID Technology reduced, helping to reduce cost. Dynamic VID Compensation Integrated into the ISL6313B are user programmable current Overcurrent Protection sense resistors, which require only a single external resistor to set their values. No external current sense resistors are Multi-tiered Overvoltage Protection required. Another unique feature of the ISL6313B is the Digital Soft-Start addition of a dynamic VID compensation pin that allows Selectable Operation Frequency up to 1.5MHz Per Phase optimizing compensation to be added for well controlled dynamic VID response. Pb-Free (RoHS Compliant) Protection features of this controller IC include a set of Ordering Information sophisticated overvoltage, undervoltage, and overcurrent PART TEMP. protection. Furthermore, the ISL6313B includes protection NUMBER PART RANGE PACKAGE PKG. against an open circuit on the remote sensing inputs. (Note) MARKING (C) (Pb-free) DWG. Combined, these features provide advanced protection for the ISL6313BCRZ* 6313B CRZ 0 to +70 36 Ld 6x6 TQFN L36.6x6 microprocessor and power system. ISL6313BIRZ* 6313B IRZ -40 to +85 36 Ld 6x6 TQFN L36.6x6 *Add -T suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN6809 Rev 0.00 Page 1 of 34 November 6, 2008ISL6313B Pinout ISL6313B (36 LD TQFN) TOP VIEW 36 35 34 33 32 31 30 29 28 PGOOD PHASE1 1 27 VID7 UGATE1 2 26 VID6 3 25 BOOT1 VID5 4 24 LGATE1 37 VID4 5 23 PVCC GND VID3 LGATE2 6 22 VID2 BOOT2 7 21 VID1 UGATE2 8 20 VID0 9 19 PHASE2 10 11 12 13 14 15 16 17 18 ISL6313B Integrated Driver Block Diagram PVCC BOOT UGATE 20k PWM SHOOT- GATE PHASE THROUGH CONTROL LOGIC PROTECTION SOFT-START AND 10k FAULT LOGIC LGATE FN6809 Rev 0.00 Page 2 of 34 November 6, 2008 IOUT EN REF SS DVC FS APA ISEN1- COMP ISEN1+ FB ISEN2+ OFS ISEN2- VSEN RSET RGND VCC