TC1266

DS21377B-page 4

© 2002 Microchip Technology Inc.

2.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 2-1.

TABLE 2-1:

PIN FUNCTION TABLE

3.0

DETAILED DESCRIPTION

FIGURE 3-1:

APPLICATION CIRCUIT

Pin No.

(8-Pin SOIC)

(8-Pin MSOP)

Symbol

Description

Main input supply for the TC1266, nominally 5V.

2

NC

Not connected.

Auxiliary input supply, nominally 3.3V.

4

GND

Logic and power ground.

5

NC

Not connected.

6

SENSE

LDO 3.3V output.

Driver output for external P-channel MOSFET pass element.

NC

GND

NC

SENSE

U1

TC1266

1

2

3

4

5

6

7

8

NOTE: External switch (Q1): use Motorola MGSF1P02ELT1 or equivalent

5V

3.3V

Q1

C1

0.1

µF

C2

4.7

µF

C3

0.1

µF

C4

4.7

µF

C5

0.1

µF

3.3V