LT8330
6
8330fa
For more information
www.linear.com/LT8330
pin FuncTions
EN/UVLO:
Shutdown and Undervoltage Detect Pin. The
LT8330 is shut down when this pin is low and active
when this pin is high. Below an accurate 1.6V threshold
the part enters undervoltage lockout and stops switching.
This allows an undervoltage lockout (UVLO) threshold to
be programmed for system input voltage by resistively
dividing down system input voltage to the EN/UVLO pin.
An 80mV pin hysteresis ensures part switching resumes
when the pin exceeds 1.68V. EN/UVLO pin voltage below
0.2V reduces V
IN
current below 1µA. If shutdown and
UVLO features are not required, the pin can be tied directly
to system input.
FBX:
Voltage Regulation Feedback Pin for Positive or
Negative Outputs. Connect this pin to a resistor divider
between the output and GND. FBX reduces the switching
frequency during start-up and fault conditions when FBX
is close to GND.
GND:
Ground Connection for the LT8330. The DFN pack-
age has the best thermal performance due to an exposed
pad (Pin 9) on the bottom of the package. This exposed
pad must be soldered to a ground plane. Pin 5 of the DFN
package (and Pin 2 of the TSOT package) should also be
connected to a ground plane. The ground plane should be
connected to large copper layers to spread heat dissipated
by the LT8330.
INTV
CC
:
Regulated 3V Supply for Internal Loads. The
INTV
CC
pin must be bypassed with a minimum 1µF low ESR
ceramic capacitor to ground. No additional components
or loading is allowed on this pin.
NC:
No Internal Connection. Tie directly to local ground.
SW:
The Output of Internal Power Switch. Minimize the
metal trace area connected to this pin to reduce EMI.
V
IN
:
Input Supply. This pin must be locally bypassed. Be
sure to place the positive terminal of the input capacitor as
close as possible to the V
IN
pin, and the negative terminal
as close as possible to the GND pin.
