TC1017-1.8VCT datasheet(9/22 Pages) MICROCHIP

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 2003 Microchip Technology Inc.

DS21813B-page 9

TC1017

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,

output voltage falls to zero, and supply current is

reduced to 0.05 µA (typ.)

3.2

Ground Terminal

For best performance, it is recommended that the

ground pin be tied to a ground plane.

3.3

Regulated Voltage Output (VOUT)

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 (VIN)

The minimum VIN has to meet two conditions in order

to ensure that the output maintains regulation:

VIN ≥ 2.7V and VIN ≥ [(VR + 2.5%) + VDROPOUT]. The

maximum VIN should be less than or equal to 6V.

Power dissipation may limit VIN 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 VIN be bypassed to GND with a

ceramic capacitor.

Pin No.

(5-Pin SC-70)

Pin No.

(5-Pin SOT-23)

Symbol

Description

SHDN

Shutdown Control Input

No Connect

GND

Ground Terminal

VOUT

Regulated Voltage Output

VIN

Unregulated Supply Input

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