DATASHEET ISL6269B FN6280 Rev 3.00 High-Performance Notebook PWM Controller With Audio-Frequency Clamp November 17, 2014 The ISL6269B 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. -40 to +100C Intersils R3 Technology combines the best features of Wide input voltage range: +5V to +25V 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 Pre-biased output start-up capability the steady-state PWM frequency. Both edges of the PWM can be Integrated MOSFET drivers and bootstrap diode modulated in response to input voltage transients and output Internal digital soft-start load transients, much faster than conventional fixed-frequency PWM controllers. Unlike a conventional hysteretic converter, the Power-good monitor ISL6269B has an error amplifier that provides 1% voltage PWM minimum frequency above audible spectrum regulation at the FB pin. Fault protection The ISL6269B has a 1.5ms digital soft-start and can be - Undervoltage protection started into a pre-biased output voltage. A resistor divider is - Soft crowbar overvoltage protection used to program the output voltage setpoint. The ISL6269B can be configured to operate in Continuous Conduction Mode -Low-side MOSFET r overcurrent protection DS(ON) (CCM) or Diode Emulation Mode (DEM), which improves - Over-temperature protection light-load efficiency. In CCM the controller always operates as a - Fault identification by PGOOD pull-down resistance synchronous rectifier, however when DEM is enabled, the Pb-free (RoHS compliant) low-side MOSFET is permitted to stay off, blocking negative current flow into the low-side MOSFET from the output Applications inductor. PCI express graphical processing unit Auxiliary power rail VRM Network adapter FN6280 Rev 3.00 Page 1 of 16 November 17, 2014ISL6269B Ordering Information PART NUMBER PART TEMP RANGE PACKAGE (Notes 1, 2, 3) MARKING (C) (RoHS Compliant) PKG. DWG. ISL6269BCRZ 62 69BCRZ -10 to +100 16 Ld 4x4 QFN L16.4x4 ISL6269BIRZ 62 69BIRZ -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. 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. 3. For Moisture Sensitivity Level (MSL), please see product information page for ISL6269B. For more information on MSL, please see tech brief TB363. Pin Configuration ISL6269B (16 LD 4x4 QFN) TOP VIEW 16 15 14 13 PVCC VIN 1 12 2 LG VCC 11 GND FCCM 3 10 PGND EN 4 9 ISEN 576 8 FN6280 Rev 3.00 Page 2 of 16 November 17, 2014 PGOOD COMP FB PHASE FSET UG BOOT VO