ISL6594BCBZ-T

DATASHEET ISL6594A, ISL6594B Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features FN9157 Rev 6.00 Sep 11, 2015 The ISL6594A and ISL6594B are high frequency MOSFET drivers specifically designed to drive upper and lower power N-Channel MOSFETs in a synchronous rectified buck converter topology. These drivers combined with the ISL6592 Digital Multi-Phase Buck PWM controller and N-Channel MOSFETs form a complete core-voltage regulator solution for advanced microprocessors. Features The ISL6594A drives the upper gate to 12V, while the lower gate can be independently driven over a range from 5V to 12V. The ISL6594B drives both upper and lower gates over a range of 5V to 12V. This drive-voltage provides the flexibility necessary to optimize applications involving trade-offs between gate charge and conduction losses. • Supports High Switching Frequency (up to 2MHz) - 3A Sinking Current Capability - Fast Rise/Fall Times and Low Propagation Delays An adaptive zero shoot-through protection is integrated to prevent both the upper and lower MOSFETs from conducting simultaneously and to minimize the dead time. These products add 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 during initial start-up. These drivers also feature a three-state PWM input which, working together with Intersil’s multi-phase PWM controllers, prevents a negative transient on the output voltage when the output is shut down. This feature eliminates the Schottky diode that is used in some systems for protecting the load from reversed output voltage events. • Dual MOSFET Drives for Synchronous Rectified Bridge • Adjustable Gate Voltage (5V to 12V) for Optimal Efficiency • 36V Internal Bootstrap Schottky Diode • Bootstrap Capacitor Overcharging Prevention • Three-State PWM Input for Output Stage Shutdown • Three-State PWM Input Hysteresis for Applications with Power Sequencing Requirement • Pre-POR Overvoltage Protection • VCC Undervoltage 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 • Pb-Free Available (RoHS Compliant) Applications • 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 TB417 for Power Train Design, Layout Guidelines, and Feedback Compensation Design FN9157 Rev 6.00 Sep 11, 2015 Page 1 of 11 ISL6594A, ISL6594B Ordering Information PART NUMBER PART MARKING ISL6594ACRZ* (Note) 94AZ ISL6594BCBZ* (Note) 6594 BCBZ (No longer available, recommended replacement: ISL6594ACRZ-T) TEMP. RANGE (°C) PACKAGE (RoHS Compliant) PKG. DWG. # 0 to +85 10 Ld 3x3 DFN L10.3x3 0 to +85 8 Ld SOIC M8.15 *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. Pinouts ISL6594ACR, ISL6594BCR (10 LD 3x3 DFN) TOP VIEW ISL6594ACB, ISL6594BCB (8 LD SOIC) TOP VIEW UGATE 1 BOOT 2 PWM 3 GND NO 4 ER NG O L E BL LA I A AV ED RT 8 POPHASE P SU R 7 PVCC O 6 5 VCC LGATE Block Diagram UGATE 1 10 PHASE BOOT 2 9 PVCC N/C 3 8 N/C PWM 4 7 VCC GND 5 6 LGATE ISL6594A AND ISL6594B BOOT UVCC VCC UGATE PRE-POR OVP FEATURES +5V 13.6k PWM 6.4k SHOOTTHROUGH PROTECTION POR/ CONTROL LOGIC PHASE (LVCC) PVCC UVCC = VCC FOR ISL6594A UVCC = PVCC FOR ISL6594B LGATE GND PAD FN9157 Rev 6.00 Sep 11, 2015 FOR DFN -DEVICES, THE PAD ON THE BOTTOM SIDE OF THE PACKAGE MUST BE SOLDERED TO THE CIRCUIT’S GROUND. Page 2 of 11 ISL6594A, ISL6594B FN9157 Rev 6.00 Sep 11, 2015 Typical Application - 4-Channel Converter Using ISL6592 and ISL6594A Gate Drivers +12V ISL6594 +5V +3.3V VDD V12_SEN 2 BOOT PVCC 7 3 PWM VCC 6 4 GND LGATE 5 ISL6594 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 ISL6594 1 UGATE PHASE 8 2 BOOT PVCC 7 3 PWM VCC 6 4 GND LGATE 5 RTN ISEN4 OUT9 RESET_N OUT10 ISL6594 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 ISL6594A, ISL6594B Absolute Maximum Ratings Thermal Information Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15V Supply Voltage (PVCC) . . . . . . . . . . . . . . . . . . . . . . . . . VCC + 0.3V BOOT Voltage (VBOOT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36V Input Voltage (VPWM) . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 7V UGATE. . . . . . . . . . . . . . . . . . . VPHASE - 0.3VDC to VBOOT + 0.3V VPHASE - 3.5V (