MCP1501-18ESLASHRW datasheet(15/36 Pages) MICROCHIP

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 2015-2016 Microchip Technology Inc.

DS20005474C-page 15

MCP1501

3.0

PIN FUNCTION TABLE

The pin functions are described in Table 3-1.

3.1

Buffered VREF Output (OUT)

This is the Buffered Reference Output. On the WDFN

and SOIC package, this should be connected to the

FEEDBACK pin at the device. The output driver is

tristated when in shutdown.

3.2

Buffered VREF Feedback

(FEEDBACK)

This is the buffer amplifier feedback pin. On the WDFN

and SOIC package, this should be connected to the

OUT pin at the device. This connection is internal on

the SOT-23 package. Note that if there is routing

impedance or IR-drop between the OUT and

FEEDBACK pins, it is the FEEDBACK pin which accu-

rately holds the output voltage. This can be used in an

application to remove IR-drop effects on output voltage

caused by the Printed Circuit Board (PCB) or

interconnect resistance with a high-current load.

3.3

System Ground (GND)

This is the power supply return and should be

connected to system ground.

3.4

Shutdown Pin (SHDN)

This is a digital input that will place the device in

Shutdown. This pin is active low.

3.5

Power Supply Input (VDD)

This power pin also serves as the input voltage for the

voltage reference. Refer to the Electrical Tables to

determine minimum voltage, based on the device.

3.6

Exposed Thermal Pad (EP)

Not internally connected, but recommend grounding.

TABLE 3-1:

PIN FUNCTION TABLE

SOT-23

SOIC

2 x 2 WDFN

Symbol

Function

OUT

Buffered VREF Output

—

FEEDBACK

Buffered VREF Feedback

2,3,5

2,4,5,6

GND

System Ground

SHDN

Shutdown Pin Active Low

VDD

Power Supply Input

—

Exposed Thermal Pad

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