MCP1702-1502ESLASHMB datasheet(13/32 Pages) MICROCHIP

13 / 32 page

DS22008D-page 13

MCP1702

3.0

PIN DESCRIPTIONS

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

TABLE 3-1:

PIN FUNCTION TABLE

3.1

Ground Terminal (GND)

Regulator ground. Tie GND to the negative side of the

output and the negative side of the input capacitor.

Only the LDO bias current (2.0 µA typical) flows out of

this pin; there is no high current. The LDO output

regulation is referenced to this pin. Minimize voltage

drops between this pin and the negative side of the

load.

3.2

Regulated Output Voltage (VOUT)

Connect VOUT to the positive side of the load and the

positive terminal of the output capacitor. The positive

side of the output capacitor should be physically

located as close to the LDO VOUT pin as is practical.

The current flowing out of this pin is equal to the DC

load current.

3.3

Unregulated Input Voltage Pin

(VIN)

Connect VIN to the input unregulated source voltage.

Like all LDO linear regulators, low source impedance is

necessary for the stable operation of the LDO. The

amount of capacitance required to ensure low source

impedance will depend on the proximity of the input

source

capacitors

battery

type.

For

most

applications, 1 µF of capacitance will ensure stable

operation of the LDO circuit. For applications that have

load currents below 100 mA, the input capacitance

requirement can be lowered. The type of capacitor

used

can

ceramic,

tantalum

aluminum

electrolytic. The low ESR characteristics of the ceramic

will yield better noise and PSRR performance at

high-frequency.

Pin No.

SOT-23A

Pin No.

SOT-89

Pin No.

TO-92

Symbol

Function

111

GND

Ground Terminal

233

VOUT

Regulated Voltage Output

32, Tab2

VIN

Unregulated Supply Voltage

–

No connection

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