ISL6226 Datasheet, PDF (5/17 Pages) Intersil Corporation – Advanced PWM and Linear Power Controller for Portable Applications

ISL6226
UGATE (Pin18)
This pin provides the gate drive for the upper MOSFET.
Connect UGATE pin to the PWM converter’s upper
MOSFET gate.
BOOT (Pin 19)
Power is supplied to the upper MOSFET driver of the PWM
converter via the BOOT pin. Connect this pin to the junction
the bootstrap capacitor with the cathode of the bootstrap
diode. The anode of the bootstrap diode is connected to pin
6, VCC.
ISEN (Pin 20)
This pin is used to monitor the voltage drop across the lower
MOSFET for current feedback control. For more precise
current detection, this input can be connected to optional
current sense resistors placed in series with the source of
the lower MOSFET.
PGOODP (Pin 21)
PGOODP is an open drain output used to indicate the status
of the PWM converter’s output voltages. This pin is pulled
low when the output is not within of their respective nominal
voltage.
FPWM (Pin 22)
This pin when pulled to VCC restrains hysterectic operation
in light loads.
VSEN (Pin 23)
This pin is connected to the PWM voltage divider to provide
the voltage feedback signal for the PWM controller. The
PGOODP, overvoltage protection (OVP) and undervoltage
shutdown circuits use this signal to determine output voltage
status and/or to initiate undervoltage shut down.
VOUT (Pin 24)
The output voltage is sensed on this pin to provide feedback
during the PWM to Hysteretic mode transition.
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