ISL6269_06 Datasheet, PDF (6/17 Pages) Intersil Corporation – High-Performance Notebook PWM Controller with Bias Regulator and Audio-Frequency Clamp

ISL6269
PHASE Pin-15 (Input)
The PHASE pin is the return current path for the UG
MOSFET driver. The PHASE pin also measures the polarity
of the low-side MOSFET drain voltage for the diode
emulation function. Connect the PHASE pin to the node
consisting of the high-side MOSFET source, the low-side
MOSFET drain, and the output inductor. Refer to Figure 1,
Typical Application Schematic.
PGOOD Pin-16 (Output)
The PGOOD pin is an open-drain output that is high
impedance when the converter is in regulation, or when the
EN pin is pulled below the falling threshold voltage V_ENTHF.
The PGOOD pin has three distinct pull-down impedances
that correspond to an OVP fault, OCP/SCP, or UVP and
soft-start. Connect the PGOOD pin to a pull-up resistor.
6
FN9177.1
August 7, 2006