TC1054 datasheet(8/18 Pages) MICROCHIP

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TC1054/TC1055/TC1186

DS21350D-page 8

3.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Unregulated Supply Input (VIN)

Connect unregulated input supply to the VIN 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 VIN 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 COUT 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 (max).

3.4

Out Of Regulation Flag (ERROR)

ERROR goes low when VOUT is out-of-tolerance by

approximately -5%.

3.5

Regulated Voltage Output (VOUT)

Connect the output load to VOUT of the LDO. Also

connect the positive side of the LDO output capacitor

as close as possible to the VOUT pin.

Pin No.

Symbol

Description

1VIN

Unregulated supply input

GND

Ground terminal

3SHDN

Shutdown control input

4ERROR

Out-of-Regulation Flag

(Open-drain output)

5VOUT

Regulated voltage output

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