Datasheet LT8335 (Analog Devices) - 6

LT8335
PIN FUNCTIONS EN/UVLO:
Shutdown and Undervoltage Detect Pin. The
GND:
Ground Connection for the LT8335. The DFN package LT8335 is shut down when this pin is low and active has an exposed pad (Pin 9) on the bottom of the package. when this pin is high. Below an accurate 1.6V threshold This exposed pad must be soldered to a ground plane. the part enters undervoltage lockout and stops switching. Pin 5 should also be connected to a ground plane. The This allows an undervoltage lockout (UVLO) threshold to ground plane should be connected to large copper layers be programmed for system input voltage by resistively to spread heat dissipated by the LT8335. dividing down system input voltage to the EN/UVLO pin.
INTV
An 80mV pin hysteresis ensures part switching resumes
CC:
Regulated 3V Supply for Internal Loads. The INTV when the pin exceeds 1.68V. EN/UVLO pin voltage below CC pin must be bypassed with a minimum 1µF low ESR ceramic capacitor to ground. No additional components 0.2V reduces VIN current below 1µA. If shutdown and or loading is allowed on this pin. UVLO features are not required, the pin can be tied directly to system input.
NC:
No Internal Connection. Tie directly to local ground.
FBX:
Voltage Regulation Feedback Pin for Positive or
SW:
The Output of Internal Power Switch. Minimize the Negative Outputs. Connect this pin to a resistor divider metal trace area connected to this pin to reduce EMI. between the output and GND. FBX reduces the switching
V
frequency during start-up and fault conditions when FBX
IN:
Input Supply. This pin must be locally bypassed. Be sure to place the positive terminal of the input capacitor as is close to GND. close as possible to the VIN pin, and the negative terminal as close as possible to the GND pin. 8335f 6 For more information www.linear.com/LT8335