MIC4680

DS20006623A-page 10

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2021 Microchip Technology Inc. and its subsidiaries

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

SHDN

Shutdown (Input): Logic low enables regulator. Logic high (>1.6V) shuts down regulator.

2

VIN

Supply Voltage (Input): Unregulated +4V to +34V supply voltage.

3

SW

Switch (Output): Emitter of NPN output switch. Connect to external storage inductor and

Schottky diode.

4

FB

Feedback (Input): Connect to output on fixed output voltage versions, or to 1.23V tap of

voltage-divider network for adjustable version.

5, 6, 7, 8

GND

Ground.