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TC1121

100mA Charge Pump Voltage Converter with Shutdown

Microchip Technology 

TC1121

2.0 PIN DESCRIPTIONS

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

TABLE 2-1: PIN FUNCTION TABLE

Pin No.

(8-Pin MSOP,

PDIP, SOIC)

1

2

3

4

5

6

7

8

Symbol

Description

FC

CAP+

GND

CAP–

OUT

SHDN

OSC

V+

Frequency control for internal oscillator, FC = open, FOSC = 10 kHz typ; FC = V+, FOSC

= 200 kHz typ; FC has no effect when OSC pin is driven externally.

Charge-pump capacitor, positive terminal.

Power-supply ground input.

Charge-pump capacitor, negative terminal.

Output, negative voltage.

Shutdown.

Oscillator control input. An external capacitor can be added to slow the oscillator. Take

care to minimize stray capacitance. An external oscillator also may be connected to

overdrive OSC.

Power-supply positive voltage input.

DS21358C-page 4

© 2006 Microchip Technology Inc.

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