ADP7105

Data Sheet

Rev. 0 | Page 6 of 28

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

Figure 3. Pin Configuration, LFCSP Package

Figure 4. Pin Configuration, Narrow-Body SOIC Package

Table 5. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

VOUT

Regulated Output Voltage. Bypass VOUT to GND with a 1 µF or greater capacitor.

2

SENSE/ADJ

Sense (SENSE). SENSE measures the actual output voltage at the load and feeds it to the error

amplifier. Connect SENSE as close as possible to the load to minimize the effect of IR drop

between the regulator output and the load. This function applies to fixed voltage models only.

Adjust Input (ADJ). An external resistor divider sets the output voltage. This function applies to

adjustable voltage models only.

3

GND

Ground.

4

SS

Soft Start. A capacitor connected to this pin determines the soft start time.

5

EN/UVLO

Enable Input (EN). Drive EN high to turn on the regulator; drive EN low to turn off the regulator.

For automatic startup, connect EN to VIN.

Programmable Undervoltage Lockout (UVLO). When the programmable UVLO function is used,

the upper and lower thresholds are determined by the programming resistors.

6

GND

Ground.

7

PG

Power Good. This open-drain output requires an external pull-up resistor to VIN or VOUT. If the

of the nominal output voltage, PG immediately transitions low. If the power-good function is

not used, the pin can be left open or connected to ground.

8

VIN

Regulator Input Supply. Bypass VIN to GND with a 1 µF or greater capacitor.

EPAD

Exposed Pad. The exposed pad on the bottom of the package enhances thermal performance

and is electrically connected to GND inside the package. It is highly recommended that the

exposed pad be connected to the ground plane on the board.

NOTES

1. IT IS HIGHLY RECOMMENDED THAT THE

EXPOSED PAD ON THE BOTTOM OF THE

PACKAGE BE CONNECTED TO THE GROUND

PLANE ON THE BOARD.

3

GND

4

SS

1

VOUT

2

SENSE/ADJ

6 GND

5 EN/UVLO

8 VIN

7 PG

ADP7105

TOP VIEW

(Not to Scale)

NOTES

1. IT IS HIGHLY RECOMMENDED THAT THE

EXPOSED PAD ON THE BOTTOM OF THE

PACKAGE BE CONNECTED TO THE GROUND

PLANE ON THE BOARD.

VOUT

1

SENSE/ADJ

2

GND

3

SS

4

VIN

8

PG

7

GND

6

EN/UVLO

5

ADP7105

TOP VIEW

(Not to Scale)