Pin Description
Pin
Pin Number
Name
GND
10 Lead
DFN
1
8 Lead
SOIC
1
Description
Ground: This pin is ground for the gate driver and control circuitry.
Gate Drive Output: This pin drives the gate of the external N-channel MOSFET.
GATE
2
2
Under normal operating conditions, the GATE pin pulls high to VC-0.5V. The
controller turns the gate off during a reverse current fault that exceeds the reverse
voltage threshold.
Controller Input Supply: This pin is the supply pin for the control circuitry and gate
VC
3
3
driver. Connect a 1 μ F capacitor between VC pin and the GND pin. Voltage on this pin
is limited to 11V by an internal shunt regulator. For high voltage auxiliary supply
applications connect a shunt resistor between VC and the auxiliary supply.
FC
5
4
Fault Clamp Input: Connect the FT pin to FC when it is pulled by a resistor to a
voltage higher than the VC pin to clamp it to VC plus a diode. Leave this pin open if
unused.
Fault State Output: This open collector pin pulls low when a fault occurs. Fault logic
FT
6
5
inputs are VC Under-Voltage, Reverse Current, Forward Over-Current, and light load.
Leave this pin open if unused.
Positive Sense Input & Clamp: Connect SP pin to the Source pin of the external N-
SP
7
6
channel MOSFET close to the GND pin. The polarity of the voltage difference
between SP and SN provides an indication of current flow direction through the
MOSFET.
Negative Sense Input & Clamp: Connect SN to the Drain pin of the external N-
SN
8
7
channel MOSFET. The polarity of the voltage difference between SP and SN provides
an indication of current flow direction through the MOSFET.
Package Pin-Outs
10 Lead DFN (3mm x 3mm)
Top view
8 Lead SOIC (5mm x 6mm)
Top view
Picor Corporation ? picorpower.com
PI2003
Rev 1.1
Page 2 of 16
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