TC57 datasheet(5/16 Pages) MICROCHIP

5 / 16 page

DS21437B-page 5

TC57

3.4

Input Capacitor

The addition of an input capacitor further reduces

output noise, and negates the effects of power supply

input impedance. A 10

µF (min) Tantalum capacitor is

recommended.

3.5

Shutdown Mode

The TC57 enters a low power shutdown mode when

the shutdown input (SHDN) is high. During shutdown,

the regulator is disabled, the output capacitor is

discharged through the load, and supply current to the

TC57 decreases to less than 1

µA. Normal operation

resumes when SHDN is brought low. If the shutdown

mode is not used, SHDN should be tied to VIN.

TABLE 3-1:

COMPONENT SUPPLIERS

Device

Mounting

Method

Manufacturer

Website

CAPACITORS

267 Series

Surface Mount

Matsuo

http://www.matsuoelectronics.com

F95 Tantalum Series

Surface Mount

Nichicon

http://www.nichicon-us.com

595 Tantalum Series

Surface Mount

Sprague

http://www.vishay.com/brands/sprague

OS-CON Series

Through-Hole

Sanyo

http://www.sanyovideo.com

LXF Series

Through-Hole

United Chemi-Con

http://chemi-con.com

TRANSISTORS

ZTX749

Through-Hole

Zetex

http://www.zetex.com

2N4403

Through-Hole

ON SEMI

http://www.onsemi.com/home

2N2907A

Through-Hole

ON SEMI

http://www.onsemi.com/home

FZT749

Surface Mount

Zetex

http://www.zetex.com

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