Datasheet LT8309 (Analog Devices) - 6

LT8309
pin FuncTions GATE (Pin 1):
N-Channel MOSFET Gate Driver Output.
VCC (Pin 4):
Input Voltage. This pin supplies current to the Switches between INTVCC and GND. Driven to GND during internal start-up circuitry and to the INTVCC LDO. This pin undervoltage lockout of INTVCC. must be locally bypassed with a capacitor.
GND (Pin 2):
Ground.
DRAIN (Pin 5):
Current Sense Pin. This pin senses
INTV
the voltage across the drain-to-source of the external
CC (Pin 3):
Regulated Supply for Internal Loads, and GATE Driver. Supplied from V N-channel MOSFET. A series resistor is needed to set the CC and regulates to 7V (typical). INTV offset voltage and needs to be at least 800Ω. The offset CC must be bypassed with a 4.7µF capacitor placed close to the pin. is equal to:  R 20mV • 1−    2000
block DiagraM
4 VCC 1.25V + 10µA 10µA – INTVCC 3 VBIAS DRAIN 5 + – VBIAS INTVCC LOGIC GATE 1 GND 2 8309 BD 8309fa 6 For more information www.linear.com/LT8309