Datasheet

TC1016
DS21666B-page 8 © 2005 Microchip Technology Inc.
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 (SHDN)
The regulator is fully enabled when a logic-high is
applied to SHDN
. The regulator enters shutdown when
a logic-low is applied to this input. During shutdown, the
output voltage falls to zero and the supply current is
reduced to 0.05 µA (typ.)
3.2 Ground Terminal (GND)
For best performance, it is recommended that the
ground pin be tied to a ground plane.
3.3 Regulated Voltage Output (V
OUT
)
Bypass the regulated voltage output to GND with a
minimum capacitance of 1 µF. A ceramic bypass
capacitor is recommended for best performance.
3.4 Unregulated Supply Input (V
IN
)
The minimum V
IN
has to meet two conditions in order
to ensure that the output maintains regulation:
V
IN
≥ 2.7V and V
IN
≥ [(V
R
+ 2.5%) + V
DROPOUT
]. The
maximum V
IN
should be less than or equal to 6V.
Power dissipation may limit V
IN
to a lower potential in
order to maintain a junction temperature below 125°C.
Refer to Section 5.0 “Thermal Considerations”, for
determining junction temperature.
It is recommended that V
IN
be bypassed to GND with a
ceramic capacitor.
5-Pin
SC-70
Pin No.
5-Pin SOT-23
Name Function
13
SHDN
Shutdown control input
2 4 NC No connect
3 2 GND Ground terminal
45V
OUT
Regulated voltage output
51V
IN
Unregulated supply input