ISL6208BCRZ-T

DATASHEET ISL6208, ISL6208B FN9115 Rev 7.00 July 14, 2014 High Voltage Synchronous Rectified Buck MOSFET Drivers The ISL6208 and ISL6208B are high frequency, dual MOSFET drivers, optimized to drive two N-Channel power MOSFETs in a synchronous-rectified buck converter topology. They are especially suited for mobile computing applications that require high efficiency and excellent thermal performance. These drivers, combined with an Intersil multiphase Buck PWM controller, form a complete single-stage core-voltage regulator solution for advanced mobile microprocessors. ISL6208 and ISL6208B have the same function but different packages. The descriptions in this datasheet are based on ISL6208 and also apply to ISL6208B. The ISL6208 features 4A typical sinking current for the lower gate driver. This current is capable of holding the lower MOSFET gate off during the rising edge of the Phase node. This prevents shoot-through power loss caused by the high dv/dt of phase voltages. The operating voltage matches the 30V breakdown voltage of the MOSFETs commonly used in mobile computer power supplies. The ISL6208 also features a three-state PWM input that, working together with Intersil’s multiphase PWM controllers, will prevent negative voltage output during CPU shutdown. This feature eliminates a protective Schottky diode usually seen in a microprocessor power systems. MOSFET gates can be efficiently switched up to 2MHz using the ISL6208. Each driver is capable of driving a 3000pF load with propagation delays of 8ns and transition times under 10ns. Bootstrapping is implemented with an internal Schottky diode. This reduces system cost and complexity, while allowing the use of higher performance MOSFETs. Adaptive shoot-through protection is integrated to prevent both MOSFETs from conducting simultaneously. A diode emulation feature is integrated in the ISL6208 to enhance converter efficiency at light load conditions. This feature also allows for monotonic start-up into pre-biased outputs. When diode emulation is enabled, the driver will allow discontinuous conduction mode by detecting when the inductor current reaches zero and subsequently turning off the low side MOSFET gate. Features • Dual MOSFET drives for synchronous rectified bridge • Adaptive shoot-through protection • 0.5 On-resistance and 4A sink current capability • Supports high switching frequency up to 2MHz - Fast output rise and fall time - Low propagation delay • Three-state PWM input for power stage shutdown • Internal bootstrap schottky diode • Low bias supply current (5V, 80µA) • Diode emulation for enhanced light load efficiency and prebiased start-up applications • VCC POR (power-on-reset) feature integrated • Low three-state shutdown holdoff time (typical 160ns) • Pin-to-pin compatible with ISL6207 • QFN and DFN package: - Compliant to JEDEC PUB95 MO-220 QFN - Quad flat no leads - package outline DFN - Dual flat no leads - package outline - Near chip scale package footprint, which improves PCB efficiency and has a thinner profile • Pb-free (RoHS compliant) Applications • Core voltage supplies for Intel® and AMD® mobile microprocessors • High frequency low profile DC/DC converters • High current low output voltage DC/DC converters • High input voltage DC/DC converters 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 MLFP Packages” • Technical Brief TB447 “Guidelines for Preventing Boot-to-Phase Stress on Half-Bridge MOSFET Driver ICs” FN9115 Rev 7.00 July 14, 2014 Page 1 of 13 ISL6208, ISL6208B Ordering Information PART NUMBER (Notes 3, 4) PART MARKING TEMP. RANGE (°C) PACKAGE (Pb-free) PKG. DWG. # ISL6208CBZ (Note 1) ISL62 08CBZ -10 to +100 8 Ld SOIC M8.15 ISL6208CRZ (Note 1) 208Z -10 to +100 8 Ld 3x3 QFN L8.3x3 ISL6208BCRZ-T (Note 2) 8BC -10 to +100 8 Ld 2x2 DFN L8.2x2D ISL6208IBZ (Note 1) ISL62 08IBZ -40 to +100 8 Ld SOIC M8.15 ISL6208IRZ (Note 1) 8IRZ -40 to +100 8 Ld 3x3 QFN L8.3x3 ISL6208BIRZ-T (Note 2) 8BI -40 to +100 8 Ld 2x2 DFN L8.2x2D NOTES: 1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. Please refer to TB347 for details on reel specifications. 3. 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. 4. For Moisture Sensitivity Level (MSL), please see device information page for ISL6208, ISL6208B. For more information on MSL please see techbrief TB363. Pin Configurations ISL6208BCRZ, ISL6208BIRZ (8 LD 2x2 DFN) TOP VIEW ISL6208CRZ, ISL6208IRZ (8 LD 3x3 QFN) TOP VIEW UGATE 1 8 PHASE UGATE PHASE ISL6208CBZ, ISL6208IBZ (8 LD SOIC) TOP VIEW BOOT 2 7 FCCM 8 7 PWM 3 6 VCC GND 4 5 LGATE 66 FCCM BOOT 1 PWM 2 3 4 GND LGATE 5 VCC UGATE 1 86 PHASE BOOT 2 7 FCCM PWM 3 66 VCC GND 4 5 LGATE Block Diagram VCC BOOT FCCM UGATE PHASE SHOOTTHROUGH PROTECTION CONTROL LOGIC PWM VCC LGATE 10k GND THERMAL PAD (FOR QFN AND DFN PACKAGE ONLY) FIGURE 1. BLOCK DIAGRAM ti FN9115 Rev 7.00 July 14, 2014 Page 2 of 13 ISL6208, ISL6208B ti Absolute Maximum Ratings Thermal Information Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V Input Voltage (VFCCM, VPWM) . . . . . . . . . . . . . . . . . . . . -0.3V to VCC + 0.3V BOOT Voltage (VBOOT-GND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 33V BOOT To PHASE Voltage (VBOOT-PHASE). . . . . . . . . . . . . . . . -0.3V to 7V (DC) -0.3V to 9V (