TC1054_12 Datasheet, PDF (8/20 Pages) Microchip Technology – 50 mA, 100 mA and 150 mA CMOS LDOs with Shutdown and ERROR Output

TC1054/TC1055/TC1186
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
Pin No.
SOT-23
1
2
3
4
5
PIN FUNCTION TABLE
Symbol
V_IN
GND
SHDN
ERROR
V_OUT
Description
Unregulated supply input
Ground terminal
Shutdown control input
Out-of-Regulation Flag (Open-drain output)
Regulated voltage output
3.1 Unregulated Supply Input (V_IN)
Connect unregulated input supply to the V_IN pin. If
there is a large distance between the input supply and
the LDO regulator, some input capacitance is
necessary for proper operation. A 1 µF capacitor
connected from V_IN to ground is recommended for
most applications.
3.2 Ground Terminal (GND)
Connect the unregulated input supply ground return to
GND. Also connect the negative side of the 1 µF typical
input decoupling capacitor close to GND and the
negative side of the output capacitor C_OUT to GND.
3.3 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 SHDN. During shutdown,
output voltage falls to zero, ERROR is open-circuited
and supply current is reduced to 0.5 µA (maximum).
3.4 Out Of Regulation Flag (ERROR)
ERROR goes low when V_OUT is out-of-tolerance by
approximately -5%.
3.5 Regulated Voltage Output (V_OUT)
Connect the output load to V_OUT of the LDO. Also
connect the positive side of the LDO output capacitor
as close as possible to the V_OUT pin.
DS21350E-page 8
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