Controller IC Chip - MOSFET ISL6269CRZ ISL6269 QFN-16 chip for laptop - Integrated Laptop Chip (Code 1-CHIP0511)

Controller IC Chip - MOSFET ISL6269CRZ ISL6269 QFN-16 chip for laptop- Integrated portable calculator chip(SKU.1-CHIP0511)

High-Performance Notebook PWM Controller with Bias Regulator and Audio-Frequency Clamp

The ISL6269 IC is a Single-Phase Synchronous-Buck PWM controller featuring Intersil's Robust Ripple Regulator (R3) technology that delivers truly superior dynamic response to input voltage and output load transients. Integrated MOSFET drivers, 5V LDO, and bootstrap diode result in fewer components and smaller implementation area.Intersil’s R3 technology combines the best features of fixed-frequency PWM and hysteretic PWM while eliminating many of their shortcomings. R3 technology employs an innovative modulator that synthesizes an AC ripple voltage signal VR, analogous to the output inductor ripple current. The AC signal VR enters a hysteretic comparator where the lower threshold is the error amplifier output VCOMP, and the upper threshold is a programmable voltage reference VW, resulting in generation of the PWM signal. The voltage reference VWsets the steady-state PWM frequency. Both rising and falling edges of the PWM are modulated, providing faster response to input voltage transients and output load transients than conventional fixed-frequency PWM controllers. Unlike a conventional hysteretic converter, the ISL6269 has an error amplifier that provides ±1% voltage regulation at the FB pin.The ISL6269 has a 1.5ms digital soft-start and can be started into a pre-biased output voltage. A resistor divider is used to program the output voltage setpoint. The ISL6269 can be configured to operate in forced-continuous-conduction-mode (FCCM) or in diode-emulation-mode (DEM), which improves light-load efficiency. In FCCM the controller always operates as a synchronous rectifier, switching the low-side MOSFET regardless of the output load, however with DEM enabled, the low-side MOSFET is disabled preventing negative current flow from the output inductor during low load operation. An audio filter prevents the PWM switching frequency from entering the audible spectrum due to extremely light load while in DEM.A PGOOD pin indicates when the converter is capable of supplying regulated voltage. The ISL6269 features a unique fault-identification capability that can drastically reduce trouble-shooting time and effort. The pull-down resistance of the PGOOD pin is 30Ω for an overcurrent fault, 60Ω for an overvoltage fault, or 90Ω for either an undervoltage fault or during soft-start. The overcurrent protection is accomplished by measuring the voltage drop across the rDS(ON) of the low-side MOSFET. A single resistor programs the overcurrent and short-circuit points. Overvoltage and undervoltage protection is monitored at the FB voltage feedback pin

• High performance synthetic ripple regulation• Extremely fast transient response• External type-two loop compensation• ±1% regulation accuracy: -10°C to +100°C• Starts into a pre-biased output• Wide input voltage range: +7.0V to +25.0V• Wide output voltage range: +0.6V to +3.3V• Wide output load range: 0A to 25A• Programmable PWM frequency: 200kHz to 600kHz• Power good monitor• Fault identification by PGOOD pull-down resistance• Integrated MOSFET drivers with shoot-through protection• Internal digital soft-start• Internal 5V LDO for self-biasing from up to 25V • Configure forced continuous conduction or diode emulation for increased light load efficiency• PWM minimum frequency above audible spectrum• Integrated boot-strap diode• Low-side MOSFET rDS(ON) overcurrent protection• Undervoltage protection• Soft crowbar overvoltage protection• Over-temperature protection• Pb-free plus anneal available (RoHS compliant)

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