ISL6594DCRZ-T

DATASHEET ISL6594D FN9282 Rev 1.00 Dec 3, 2007 Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features The ISL6594D is high frequency MOSFET driver specifically designed to drive upper and lower power N-Channel MOSFETs in a synchronous rectified buck converter topology. This driver combined with the ISL6594D Digital Multi-Phase Buck PWM controller and N-Channel MOSFETs forms a complete core-voltage regulator solution for advanced microprocessors. The ISL6594D drives both upper and lower gates over a range of 4.5V to 13.2V. This drive-voltage provides the flexibility necessary to optimize applications involving trade-offs between gate charge and conduction losses. Features • Dual MOSFET Drives for Synchronous Rectified Bridge • Pin-to-pin Compatible with ISL6596 • Advanced Adaptive Zero Shoot-Through Protection - Body Diode Detection - Auto-zero of rDS(ON) Conduction Offset Effect • Adjustable Gate Voltage for Optimal Efficiency • 36V Internal Bootstrap Schottky Diode • Bootstrap Capacitor Overcharging Prevention An advanced adaptive zero shoot-through protection is integrated to prevent both the upper and lower MOSFETs from conducting simultaneously and to minimize the dead time. The ISL6594D includes an overvoltage protection feature operational before VCC exceeds its turn-on threshold, at which the PHASE node is connected to the gate of the low side MOSFET (LGATE). The output voltage of the converter is then limited by the threshold of the low side MOSFET, which provides some protection to the microprocessor if the upper MOSFET(s) is shorted. • Supports High Switching Frequency (up to 2MHz) - 3A Sinking Current Capability - Fast Rise/Fall Times and Low Propagation Delays The ISL6594D also features an input that recognizes a high-impedance state, working together with Intersil multiphase PWM controllers to prevent negative transients on the controlled output voltage when operation is suspended. This feature eliminates the need for the Schottky diode that may be utilized in a power system to protect the load from negative output voltage damage. • VCC Undervoltage Protection Ordering Information • Pb-Free (RoHS Compliant) PART NUMBER PART TEMP. (Note) MARKING RANGE (°C) ISL6594DCBZ PACKAGE (Pb-free) PKG. DWG. # 6594 DCBZ 0 to +85 8 Ld SOIC M8.15 ISL6594DCBZ-T* 6594 DCBZ 0 to +85 8 Ld SOIC M8.15 Tape and Reel ISL6594DCRZ 94DZ 0 to +85 10 Ld 3x3 DFN L10.3x3 ISL6594DCRZ-T* 94DZ 0 to +85 10 Ld 3x3 DFN L10.3x3 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. FN9282 Rev 1.00 Dec 3, 2007 • Optimized for 3.3V PWM Input • Three-State PWM Input for Output Stage Shutdown • Three-State PWM Input Hysteresis for Applications With Power Sequencing Requirement • Pre-POR Overvoltage Protection • Expandable Bottom Copper Pad for Enhanced Heat Sinking • Dual Flat No-Lead (DFN) Package - Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile Applications • Optimized for POL DC/DC Converters for IBA Systems • Core Regulators for Intel® and AMD® Microprocessors • High Current DC/DC Converters • High Frequency and High Efficiency VRM and VRD Related Literature Technical Brief TB363 “Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)” Technical Brief TB389 “PCB Land Pattern Design and Surface Mount Guidelines for QFN (MLFP) Packages” Page 1 of 11 ISL6594D Pinouts ISL6594DCR (10 LD 3x3 DFN) TOP VIEW ISL6594DCB (8 LD SOIC) TOP VIEW UGATE 1 8 PHASE BOOT 2 7 PVCC PWM 3 6 VCC GND 4 5 LGATE Block Diagram 1 UGATE BOOT 2 N/C 3 PWM 4 GND 5 10 PHASE 9 PVCC GND 8 N/C 7 VCC 6 LGATE ISL6594D UVCC BOOT VCC UGATE Pre-POR OVP FEATURES +5V 13.6k PWM 6.4k SHOOTTHROUGH PROTECTION POR/ CONTROL LOGIC PHASE (LVCC) PVCC UVCC = PVCC FOR ISL6594D LGATE GND PAD FN9282 Rev 1.00 Dec 3, 2007 FOR DFN DEVICES, THE PAD ON THE BOTTOM SIDE OF THE PACKAGE MUST BE SOLDERED TO THE CIRCUIT’S GROUND. Page 2 of 11 ISL6594D FN9282 Rev 1.00 Dec 3, 2007 Typical Application - 4 Channel Converter Using ISL6592 and ISL6594D Gate Drivers +12V ISL6594D +5V +3.3V VDD V12_SEN 2 BOOT PVCC 7 3 PWM VCC 6 4 GND LGATE 5 ISL6594D 1 UGATE PHASE 8 OUT1 2 BOOT PVCC 7 VID4 OUT2 3 PWM VCC 6 VID3 ISEN1 4 GND LGATE 5 VID2 OUT3 VID1 OUT4 VID0 ISEN2 VID5 OUT5 LL0 OUT6 LL1 ISEN3 OUTEN OUT7 OUT8 TO µP PHASE 8 GND ISL6592 FROM µP 1 UGATE VCC_PWRGD Vout ISL6594D 1 UGATE PHASE 8 2 BOOT PVCC 7 3 PWM VCC 6 4 GND LGATE 5 RTN ISEN4 OUT9 RESET_N OUT10 ISL6594D ISEN5 1 UGATE PHASE 8 PVCC 7 FAULT FAULT1 OUT11 2 BOOT OUTPUTS FAULT2 OUT12 3 PWM VCC 6 ISEN6 4 GND LGATE 5 Page 3 of 11 I2C I/F BUS SDA TEMP_SEN SCL CAL_CUR_EN SADDR CAL_CUR_SEN VSENP VSENN RTHERM ISL6594D Absolute Maximum Ratings Thermal Information Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15V Supply Voltage (PVCC) . . . . . . . . . . . . . . . . . . . . . . . . . VCC + 0.3V BOOT Voltage (VBOOT-GND). . . . . . . . . . . . . . . . . . . . . . . . . . . .36V Input Voltage (VPWM) . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 7V UGATE. . . . . . . . . . . . . . . . . . . VPHASE - 0.3VDC to VBOOT + 0.3V VPHASE - 3.5V (