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2022 Microchip Technology Inc. and its subsidiaries

DS20006355A-page 7

MIC2171

3.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PIN FUNCTION TABLE

Pin Number Pin Name

Description

1

COMP

Frequency Compensation: Output of transconductance-type error amplifier. Primary

function is for loop stabilization. Can also be used for output voltage soft-start and

current limit tailoring.

2

FB

Feedback: Inverting input of error amplifier. Connect to external resistive divider to set

switching regulator output voltage.

3

GND

Ground: Connect directly to the input filter capacitor for proper operation (see

applications info).

4

SW

Power Switch Collector: Collector of NPN switch. Connect to external inductor or input

voltage depending on circuit topology.

5

IN

Supply Voltage: 3.0V to 40V