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IC / 6269ACRZ / ISL6269ACRZ / QFN-16

تولید کننده: Intersil
مدل کالا: ISL6269ACRZ
موجودی:
تماس 8893- 6186
قیمت: 0تومان

6269ACRZ - ISL6269ACRZ – Intersil – QFN-16

High-Performance Notebook PWM Controller

عملکرد بالا PWM کنترل نوت بوک

 

The ISL6269A 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 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 window 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 VW sets the steady-state PWM frequency. Both edges of the PWM can be modulated in response to input voltage transients and output load transients, much faster than conventional fixed-frequency PWM controllers. Unlike a conventional hysteretic converter, the ISL6269A has an error amplifier that provides ±1% voltage regulation at the FB pin

The ISL6269A has a 1.5ms digital soft-start and can be started into a prebiased output voltage. A resistor divider is used to program the output voltage setpoint. The ISL6269A can be configured to operate in Continuous Conduction Mode (CCM) or Diode Emulation Mode (DEM), which improves light-load efficiency. In CCM the controller always operates as a synchronous rectifier, however when DEM is enabled, the low-side MOSFET is permitted to stay off, blocking negative current flow into the low-side MOSFET from the output inductor

 

Features

 High performance R3™ Technology

Fast transient response

±1% regulation accuracy: -10°C to +100°C and -40°C to +100°C

Wide input voltage range: +5.0V to +25.0V

Output voltage range: +0.6V to +3.3V

Wide output load range: 0A to 25A

Selectable diode emulation mode for increased light load efficiency

Programmable PWM frequency: 200kHz to 600kHz

Prebiased output start-up capability

Integrated MOSFET drivers and bootstrap diode

Internal digital soft-start

Power good monitor

Fault protection

Undervoltage protection

Soft crowbar overvoltage protection

Low-side MOSFET rDS(ON) overcurrent protection

Over-temperature protection

Fault identification by PGOOD pull down resistance

Pb-free /RoHS compliant

 

Applications

PCI express graphical processing unit

Auxiliary power rail

VRM

Network adapter

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