DATASHEET ISL6594D FN9282 Rev 1.00 Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features Dec 3, 2007 The ISL6594D is high frequency MOSFET driver specifically Features designed to drive upper and lower power N-Channel Dual MOSFET Drives for Synchronous Rectified Bridge MOSFETs in a synchronous rectified buck converter topology. This driver combined with the ISL6594D Digital Pin-to-pin Compatible with ISL6596 Multi-Phase Buck PWM controller and N-Channel MOSFETs Advanced Adaptive Zero Shoot-Through Protection forms a complete core-voltage regulator solution for - Body Diode Detection advanced microprocessors. - Auto-zero of r Conduction Offset Effect DS(ON) The ISL6594D drives both upper and lower gates over a range Adjustable Gate Voltage for Optimal Efficiency of 4.5V to 13.2V. This drive-voltage provides the flexibility necessary to optimize applications involving trade-offs between 36V Internal Bootstrap Schottky Diode gate charge and conduction losses. Bootstrap Capacitor Overcharging Prevention An advanced adaptive zero shoot-through protection is Supports High Switching Frequency (up to 2MHz) integrated to prevent both the upper and lower MOSFETs - 3A Sinking Current Capability from conducting simultaneously and to minimize the dead - Fast Rise/Fall Times and Low Propagation Delays time. The ISL6594D includes an overvoltage protection Optimized for 3.3V PWM Input feature operational before VCC exceeds its turn-on threshold, at which the PHASE node is connected to the Three-State PWM Input for Output Stage Shutdown gate of the low side MOSFET (LGATE). The output voltage Three-State PWM Input Hysteresis for Applications With of the converter is then limited by the threshold of the low Power Sequencing Requirement side MOSFET, which provides some protection to the microprocessor if the upper MOSFET(s) is shorted. Pre-POR Overvoltage Protection The ISL6594D also features an input that recognizes a VCC Undervoltage Protection high-impedance state, working together with Intersil multi- Expandable Bottom Copper Pad for Enhanced Heat phase PWM controllers to prevent negative transients on the Sinking controlled output voltage when operation is suspended. This Dual Flat No-Lead (DFN) Package feature eliminates the need for the Schottky diode that may - Near Chip-Scale Package Footprint Improves PCB be utilized in a power system to protect the load from Efficiency and Thinner in Profile negative output voltage damage. Pb-Free (RoHS Compliant) Ordering Information PART NUMBER PART TEMP. PACKAGE PKG. Applications (Note) MARKING RANGE (C) (Pb-free) DWG. Optimized for POL DC/DC Converters for IBA Systems ISL6594DCBZ 6594 DCBZ 0 to +85 8 Ld SOIC M8.15 Core Regulators for Intel and AMD Microprocessors ISL6594DCBZ-T* 6594 DCBZ 0 to +85 8 Ld SOIC M8.15 Tape and Reel High Current DC/DC Converters ISL6594DCRZ 94DZ 0 to +85 10 Ld 3x3 DFN L10.3x3 High Frequency and High Efficiency VRM and VRD ISL6594DCRZ-T* 94DZ 0 to +85 10 Ld 3x3 DFN L10.3x3 Tape and Reel Related Literature *Please refer to TB347 for details on reel specifications. Technical Brief TB363 Guidelines for Handling and NOTE: These Intersil Pb-free plastic packaged products employ Processing Moisture Sensitive Surface Mount Devices special Pb-free material sets molding compounds/die attach (SMDs) materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Technical Brief TB389 PCB Land Pattern Design and Pb-free soldering operations. Intersil Pb-free products are MSL Surface Mount Guidelines for QFN (MLFP) Packages 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 Page 1 of 11 Dec 3, 2007ISL6594D Pinouts ISL6594DCB ISL6594DCR (8 LD SOIC) (10 LD 3x3 DFN) TOP VIEW TOP VIEW UGATE 1 8 PHASE 1 10 UGATE PHASE BOOT 2 9 2 7 BOOT PVCC PVCC 3 GND 8 N/C N/C PWM 3 6 VCC PWM 4 7 VCC GND 4 5 LGATE GND 5 6 LGATE Block Diagram ISL6594D UVCC BOOT VCC UGATE Pre-POR OVP +5V PHASE FEATURES SHOOT- (LVCC) THROUGH 13.6k PVCC PROTECTION UVCC = PVCC FOR ISL6594D PWM POR/ CONTROL LOGIC LGATE 6.4k GND FOR DFN DEVICES, THE PAD ON THE BOTTOM SIDE OF PAD THE PACKAGE MUST BE SOLDERED TO THE CIRCUITS GROUND. FN9282 Rev 1.00 Page 2 of 11 Dec 3, 2007