© 2007 Microchip Technology Inc.

DS22061A-page 11

MCP1602

3.0

PIN DESCRIPTIONS

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

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Shutdown Control Input Pin

(SHDN)

The SHDN pin is a logic-level input used to enable or

will ensure that the regulator is disabled.

3.2

Analog Input Supply Voltage Pin

3.3

Power-Good Output Pin (PG)

PG is an output level indicating that the output voltage

is within 94% of regulation. The PG output is configured

as an open-drain output.

3.4

physical layout information in the

Section 5.8 “PCB

Layout Information” section for ground recommenda-

tions.

3.5

For the adjustable output voltage options, connect the

fixed-output voltage options, connect the output of the

3.6

Power Supply Input Voltage Pin

3.7

carries large signal-level current; all connections

should be made as short as possible.

3.8

These large signal level ground traces should have a

small loop area and length to prevent coupling of

switching noise to sensitive traces.

3.9

Exposed Metal Pad (EP)

For the DFN package, connect the Exposed Pad to

package.

MSOP

DFN

Sym

Description

1

1

SHDN

Shutdown Input Pin

22

Analog Input Supply Voltage Pin

3

3

PG

Power Good Output Pin

44

Analog Ground Pin

55

Feedback Voltage (Adjustable Version) / Output Voltage (Fixed Version) Pin

66

Input Supply Voltage Pin

77

Buck Inductor Output Pin

88

Power Ground Pin

—

Exposed

Pad

EP

For the DFN package, the center exposed pad is a thermal path to remove

heat from the device. Electrically this pad is at ground potential and should