ADP1764

Data Sheet

Rev. A | Page 6 of 20

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

12

11

10

1

3

4

9

2

VIN

VIN

VIN

VIN

VOUT

NOTES

1. THE EXPOSED PAD IS ELECTRICALLY

CONNECTED TO GND. IT IS RECOMMENDED

THAT THIS PAD BE CONNECTED TO A GROUND

PLANE ON THE PCB. THE EXPOSED PAD IS

ON THE BOTTOM OF THE PACKAGE.

VOUT

VOUT

VOUT

ADP1764

TOP VIEW

(Not to Scale)

Figure 3. Pin Configuration

Table 6. Pin Function Descriptions

Pin No.

Mnemonic

Description

1 to 4

VIN

Regulator Input Supply. Bypass VIN to GND with a 22 µF or greater capacitor. Note that all four VIN pins must be

connected to the source supply.

5

REFCAP

Reference Filter Capacitor. Connect a 1 µF capacitor from the REFCAP pin to ground. Do not connect a load from

this pin to ground.

6

VREG

Regulated Input Supply to LDO Amplifier. Bypass VREG to GND with a 1 µF or greater capacitor. Do not connect a

load from this pin to ground.

7

GND

Ground.

8

VADJ

Adjustable Voltage Pin for the Adjustable Output Option. Connect a 10 kΩ external resistor between the VADJ pin

and ground to set the output voltage to 1.5 V. For the fixed output option, leave this pin floating.

9 to 12

VOUT

Regulated Output Voltage. Bypass VOUT to GND with a 22 µF or greater capacitor. Note that all four VOUT pins

must be connected to the load.

13

SENSE

Sense Input. The SENSE pin measures the actual output voltage at the load and feeds it to the error amplifier.

Connect SENSE as close to the load as possible to minimize the effect of IR drop between VOUT and the load.

14

SS

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

15

PG

Power-Good Output. This open-drain output requires an external pull-up resistor. If the device is in shutdown

output voltage, the PG pin immediately transitions to low.

16

EN

Enable Input. Drive the EN pin high to turn on the regulator. Drive the EN pin low to turn off the regulator. For

automatic startup, connect the EN pin to the VIN pin.

EP

Exposed Pad. The exposed pad is electrically connected to GND. It is recommended that this pad be connected to

a ground plane on the PCB. The exposed pad is on the bottom of the package.