LTC3255 datasheet(8/28 Pages) LINER

8 / 28 page

LTC7820

7820fc

For more information www.linear.com/LTC7820

PIN FUNCTIONS

VLOW (Pin 20): Half Supply from VHIGH_SENSE. Connect a

bypass capacitor from this node to PGND.

VLOW_SENSE (Pin 19): Kelvin Sensing Input. Monitors the

voltage on VLOW.

FREQ(Pin5):FrequencySetPin.Thereisaprecision10µA

current flowing out of this pin. A resistor to ground sets

a voltage which in turn programs the frequency. See the

Applications Information section for detailed information.

NC (Pins 2, 10, 13, 26): No Connection. Always keep

these pins floating. These pins are intentionally skipped

to isolate adjacent high voltage pins.

GND (Exposed Pad Pin 29): Signal and Power Ground. All

small-signal components should connect to this ground,

which in turn connects to system power ground at one

point. The exposed pad must be soldered to the PCB,

providing a local ground for the control components of the

IC, which should be tied to system power ground under

the IC. For inverter applications, GND should connect to

the negative output and all small signal components still

referred to GND pin.

LTC3255 Datasheet(PDF) 8 Page - Linear Technology