

2016 - 2021 Microchip Technology Inc. and its subsidiaries.

DS20005677B-page 9

MIC5021

4.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 4-1.

TABLE 4-1:

PIN FUNCTION TABLE

Pin Number

Pin Name

Description

1

Supply (+12V to 36V). Decouple with ≥ 10 µF capacitor.

2

INPUT

TTL-Compatible Input. Logic high turns the external MOSFET on. An internal

pull-down returns an open pin logic low.

3

CT

(duty cycle adjustment):

Open = Approximately 20% duty cycle.

Capacitor-to-Ground = Approximately 20% to <1% duty cycle.

Pull-Up Resistor = Approximately 20% to approximately 75% duty cycle.

Ground = Maintained shutdown upon overcurrent condition.

4

GND

Circuit Ground.

5

SENSE+

Current-Sense Comparator (+) Input. Connect to high side of sense resistor or cur-

rent sensing MOSFET sense lead. A built-in offset in conjunction with RSENSE

sets the load overcurrent trip point.

6

SENSE– Current-Sense Comparator (–) Input. Connect to the low side of the sense resistor

(usually the high side of the load).

7

GATE

maximum to prevent gate-to-source damage. Will sink-and-source current.

8

source pin supplies charge to quickly enhance the gate output during turn-on.