Data Sheet

ADP322/ADP323

Rev. E | Page 7 of 24

12

11

10

1

3

4

GND

NIC

VIN3

9

FB3

EN1

VIN1/VIN2

2

VBIAS

FB1

TOP VIEW

(Not to Scale)

ADP323

NOTES

1. NIC = NOT INTERNALLY CONNECTED.

2. CONNECT EXPOSED PAD TO GROUND PLANE.

Figure 4. ADP323 Pin Configuration

Table 6. ADP323 Pin Function Descriptions

Pin No.

Mnemonic

Description

1

EN1

Enable Input for Regulator 1. Drive EN1 high to turn on Regulator 1; drive it low to turn off Regulator 1. For

automatic startup, connect EN1 to VBIAS.

2

VBIAS

Input Voltage Bias Supply. Bypass VBIAS to GND with a 1 µF or greater capacitor.

3

VIN1/VIN2

Regulator Input Supply for Output Voltage 1 and Output Voltage 2. Bypass VIN1/VIN2 to GND with a 1 µF or

greater capacitor.

4

FB1

Connect the midpoint of the voltage divider from VOUT1 to GND to set VOUT1.

5

VOUT1

Regulated Output Voltage 1. Connect a 1 µF or greater output capacitor between VOUT1 and GND.

6

VOUT2

Regulated Output Voltage 2. Connect a 1 µF or greater output capacitor between VOUT2 and GND.

7

FB2

Connect the midpoint of the voltage divider from VOUT2 to GND to set VOUT2.

8

VOUT3

Regulated Output Voltage 3. Connect a 1 µF or greater output capacitor between VOUT3 and GND.

9

FB3

Connect the midpoint of the voltage divider from VOUT3 to GND to set VOUT3.

10

VIN3

Regulator Input Supply for Output Voltage 3. Bypass VIN3 to GND with a 1 µF or greater capacitor.

11

NIC

Not Internally Connected. This pin is not connected internally.

12

GND

Ground Pin.

13

NIC

Not Internally Connected. This pin is not connected internally.

14

NIC

Not Internally Connected. This pin is not connected internally.

15

EN3

Enable Input for Regulator 3. Drive EN3 high to turn on Regulator 3; drive it low to turn off Regulator 3. For

automatic startup, connect EN3 to VBIAS.

16

EN2

Enable Input for Regulator 2. Drive EN3 high to turn on Regulator 2; drive it low to turn off Regulator 2. For

automatic startup, connect EN2 to VBIAS.

EP

Exposed pad for enhanced thermal performance. Connect to copper ground plane.