DATASHEET ISL6269A FN9253 Rev 3.00 High-Performance Notebook PWM Controller November 18, 2014 The ISL6269A IC is a Single-phase Synchronous-Buck PWM Features controller featuring Intersil s Robust Ripple Regulator R3 High performance R3 Technology Technology that delivers truly superior dynamic response to input voltage and output load transients. Integrated MOSFET Fast transient response drivers and bootstrap diode result in fewer components and 1% regulation accuracy: -10C to +100C and smaller implementation area. -40C to +100C Intersils R3 Technology combines the best features of Wide input voltage range: +5.0V to +25.0V fixed-frequency PWM and hysteretic PWM while eliminating Output voltage range: +0.6V to +3.3V many of their shortcomings. R3 Technology employs an innovative modulator that synthesizes an AC ripple voltage Wide output load range: 0A to 25A signal V , analogous to the output inductor ripple current. The R Selectable diode emulation mode for increased light load AC signal V enters a window comparator where the lower R efficiency threshold is the error amplifier output V , and the upper COMP Programmable PWM frequency: 200kHz to 600kHz threshold is a programmable voltage reference V resulting in W, generation of the PWM signal. The voltage reference V sets W Prebiased output start-up capability the steady-state PWM frequency. Both edges of the PWM can Integrated MOSFET drivers and bootstrap diode be modulated in response to input voltage transients and Internal digital soft-start output load transients, much faster than conventional fixed-frequency PWM controllers. Unlike a conventional Power good monitor hysteretic converter, the ISL6269A has an error amplifier that Fault protection provides 1% voltage regulation at the FB pin. - Undervoltage protection The ISL6269A has a 1.5ms digital soft-start and can be - Soft crowbar overvoltage protection started into a prebiased output voltage. A resistor divider is -Low-side MOSFET r overcurrent protection DS(ON) used to program the output voltage setpoint. The ISL6269A - Over-temperature protection can be configured to operate in Continuous Conduction Mode (CCM) or Diode Emulation Mode (DEM), which improves - Fault identification by PGOOD pull down resistance light-load efficiency. In CCM the controller always operates as a Pb-free (RoHS compliant) synchronous rectifier, however when DEM is enabled, the low-side MOSFET is permitted to stay off, blocking negative Applications current flow into the low-side MOSFET from the output PCI express graphical processing unit inductor. Auxiliary power rail VRM Network adapter FN9253 Rev 3.00 Page 1 of 15 November 18, 2014ISL6269A Pin Configuration ISL6269A (16 LD 4x4 QFN) TOP VIEW 16 15 14 13 1 12 PVCC VIN 2 11 LG VCC GND 3 10 PGND FCCM 4 9 ISEN EN 576 8 Ordering Information PART NUMBER TEMP RANGE PACKAGE (Notes 1, 2, 3)PART MARKING (C) (RoHS Compliant) PKG. DWG. ISL6269ACRZ 62 69ACRZ -10 to +100 16 Ld 4x4 QFN L16.4x4 ISL6269AIRZ 62 69AIRZ -40 to +100 16 Ld 4x4 QFN L16.4x4 NOTES: 1. Add -T* suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are 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. 3. For Moisture Sensitivity Level (MSL), please see product information page for ISL6269A. For more information on MSL, please see tech brief TB363. FN9253 Rev 3.00 Page 2 of 15 November 18, 2014 COMP PGOOD FB PHASE FSET UG BOOT VO