Data Sheet

ADPL42005

analog.com

Rev. 0

8 of 26

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

Figure 3. LFCSP Package

Figure 4. Narrow Body SOIC Package

Pin Descriptions

Table 5. Pin Descriptions

PIN

NAME

DESCRIPTION

CFG 1

1

VOUT

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

2

SENSE/ADJ

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 voltages

only. Adjust Input (ADJ). An external resistor divider sets the output voltage. This

function applies to adjustable voltages only.

3

GND

Ground

4

NC

Do Not Connect to This Pin.

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 part is in shutdown, current limit, thermal shutdown, or falls below 90% of the

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

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

8

VIN

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

EPAD

Exposed Pad. Exposed paddle on the bottom of the package. The EPAD enhances

thermal performance and is electrically connected to GND inside the package. It is

highly recommended that the EPAD be connected to the ground plane on the board.

NOTES

1. NC = NO CONNECT. DO NOT CONNECT TO

THIS PIN.

2. 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

NC

1

VOUT

2

SENSE/ADJ

6 GND

5 EN/UVLO

8 VIN

7 PG

ADPL42005

TOP VIEW

(Not to Scale)

EXPOSED PAD

NOTES

1. NC = NO CONNECT. DO NOT CONNECT TO

THIS PIN.

2. 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

NC 4

VIN

8

PG

7

GND

6

EN/UVLO

5

ADPL42005

TOP VIEW

(Not to Scale)

EXPOSED PAD