ISL8104CBZ

DATASHEET ISL8104 FN9257 Rev 2.00 March 7, 2008 8V to 14V, Single-Phase Synchronous Buck Pulse-Width Modulation (PWM) Controller With Integrated Gate Drivers The ISL8104 is a 8V to 14V synchronous PWM controller with integrated MOSFET drivers. The controller features the ability to safely start-up into prebiased output loads and provides protection against overcurrent fault events. Overcurrent protection is implemented using top-side MOSFET rDS(ON) sensing, eliminating the need for a current sensing resistor. Features The ISL8104 employs voltage-mode control with dual-edge modulation to achieve fast transient response. The operating frequency is adjustable from 50kHz to 1.5MHz with full (0% to 100%) PWM duty cycle capability. The error amplifier features a 15MHz (typ) gain-bandwidth product and 6V/µs slew rate enabling high converter bandwidth. • Voltage-Mode PWM Control with Dual-Edge Modulation The output voltage of the converter can be regulated to as low as 0.597V with a tolerance of ±1.0% over the commercial temperature range (0°C to +70°C), and ±1.5% over industrial temperature range (-40°C to +85°C). Provided in the QFN package, a SS pin and REFIN pin enable supply sequencing and voltage tracking functionality. Pinouts SSDONE TSOC FSET VCC 15 14 13 3 10 PGND EN 4 9 TGATE FB LX 11 BGATE GND 2 REFIN COMP 8 BOOT 14 VCC TSOC 2 13 PVCC 12 BGATE COMP 4 11 PGND FB 5 10 BOOT EN 6 9 TGATE FN9257 Rev 2.00 March 7, 2008 • Lossless Programmable Overcurrent Protection - Top-Side MOSFET’s rDS(ON) Sensing - ~120ns Blanking Time Applications • Test and Measurement Instruments • Distributed DC/DC Power Architecture • Industrial Applications • Telecom/Datacom Applications PART NUMBER PART TEMP. (Note) MARKING RANGE (°C) FSET 1 GND 7 • Programmable Operating Frequency from 50kHz to 1.5MHz Ordering Information ISL8104 (14 LD SOIC) TOP VIEW SS 3 • Fast Transient Response - 15MHz (typ) Gain-Bandwidth Error Amplifier with 6V/µs slew rate - Full 0% to 100% Duty Cycle Support • Pb-free available (RoHS compliant) 12 PVCC 7 • 14V High Speed N-Channel MOSFET Gate Drivers - 2.0A Source/3A Sink at 14V Bottom-Side Gate Drive - 1.25A Source/2A Sink at 14V Top-Side Gate Drive • Soft-Start Done and an External Reference Pin for Tracking Applications are Available in the QFN Package 1 6 • 0.597V Internal Reference Voltage - 1.0% Over the Commercial Temperature Range - 1.5% Over the Industrial Temperature Range • Support for Start-Up into Prebiased Loads SS 5 - 1.5V to 15.4V Input Voltage Range • Sourcing and Sinking Current Capability ISL8104 (16 LD QFN) TOP VIEW 16 • +8V ±5% to +14V ±10% Bias Voltage Range 8 LX PACKAGE (Pb-free) PKG. DWG. # ISL8104CBZ* 8104CBZ 0 to +70 14 Ld SOIC M14.15 ISL8104IBZ* 8104IBZ -40 to +85 14 Ld SOIC M14.15 ISL8104CRZ* 81 04CRZ 0 to +70 16 Ld 4x4 QFN L16.4x4 ISL8104IRZ* 81 04IRZ -40 to +85 16 Ld 4x4 QFN L16.4x4 ISL8104EVAL1Z Evaluation Board ISL8104EVAL2Z Evaluation Board *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. Page 1 of 14 EN SS ISL8104 FN9257 Rev 2.00 March 7, 2008 Block Diagram VCC TSOC INTERNAL REGULATOR 200µA POWER-ON RESET (POR) 30A BOOT SOURCE OCP TGATE SOFT-START AND FAULT LOGIC SSDONE (QFN ONLY) FSET GATE CONTROL LOGIC OSCILLATOR 6µA LX PWM REFERENCE VREF = 0.597 V PVCC EA REFIN (QFN ONLY) BGATE GND PGND FB COMP Page 2 of 14 ISL8104 Typical Application with Single Power Supply +8V TO +14V VIN LIN RFILTER CF2 VCC CF1 DBOOT CBIN CHFIN PVCC BOOT RTSOC TSOC SSDONE (QFN ONLY) CTSOC REFIN (QFN ONLY) TGATE EN BGATE LOUT LX ISL8104 RFSET CBOOT Q1 Q2 VOUT CHFOUT CBOUT PGND FSET COMP R2 C2 SS R3 C1 FB CSS C3 GND R1 R0 Typical Application with Separated Power Supplies +1.5V TO +15.4V VIN +8V TO +14V VCC RFILTER CF2 CF1 VCC DBOOT CBIN CHFIN PVCC BOOT RTSOC TSOC SSDONE (QFN ONLY) CTSOC REFIN (QFN ONLY) FN9257 Rev 2.00 March 7, 2008 CHFOUT VOUT CBOUT PGND COMP C2 SS CSS Q2 BGATE ISL8104 FSET LOUT LX EN RFSET CBOOT Q1 TGATE FB GND R2 C3 R3 C1 R0 R1 Page 3 of 14 ISL8104 Absolute Maximum Ratings Thermal Information Supply Voltage, VPVCC, VVCC . . . . . . . . . . . . . GND - 0.3V to +16V Enable Voltage, VEN . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +16V Soft-start Done Voltage, VSSDONE . . . . . . . . . . GND - 0.3V to +16V TSOC Voltage, VTSOC. . . . . . . . . . . . . . . . . . . . GND - 0.3V to +16V BOOT Voltage, VBOOT . . . . . . . . . . . . . . . . . . . GND - 0.3V to +36V LX Voltage, VLX . . . . . . . . . . . . . . . . VBOOT - 16V to VBOOT + 0.3V All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 5.0V ESD Rating ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 2 Thermal Resistance (Typical) JA (°C/W) JC (°C/W) SOIC Package (Note 1) . . . . . . . . . . . . 95 N/A QFN Package (Notes 2, 3). . . . . . . . . . 47 8.5 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Operating Conditions Supply Voltage, VVCC . . . . . . . . . . . . . . . . .+8V 5% to +14V 10% Supply Voltage, VPVCC . . . . . . . . . . . . . . . .+8V 5% to +14V 10% Boot to Phase Voltage, VBOOT - VLX . . . . . . . . . . . . . . . . .