TC57 Datasheet, PDF (5/16 Pages) Microchip Technology – Line Regulator Controller

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 10µF (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 1µA. Normal operation
resumes when SHDN is brought low. If the shutdown
mode is not used, SHDN should be tied to V_IN.
TABLE 3-1: COMPONENT SUPPLIERS
Device
CAPACITORS
267 Series
F95 Tantalum Series
595 Tantalum Series
OS-CON Series
LXF Series
TRANSISTORS
ZTX749
2N4403
2N2907A
FZT749
Mounting
Method
Manufacturer
Website
Surface Mount
Surface Mount
Surface Mount
Through-Hole
Through-Hole
Matsuo
Nichicon
Sprague
Sanyo
United Chemi-Con
http://www.matsuoelectronics.com
http://www.nichicon-us.com
http://www.vishay.com/brands/sprague
http://www.sanyovideo.com
http://chemi-con.com
Through-Hole
Through-Hole
Through-Hole
Surface Mount
Zetex
ON SEMI
ON SEMI
Zetex
http://www.zetex.com
http://www.onsemi.com/home
http://www.onsemi.com/home
http://www.zetex.com
© 2002 Microchip Technology Inc.
DS21437B-page 5