Datasheet

Data Sheet ADP322/ADP323
Rev. A | Page 7 of 24
12
11
10
1
3
4
GND
NC
VIN3
9FB3
EN1
VIN1/VIN2
2
VBIAS
FB1
6
VOUT2
5
VOUT1
7
FB2
8
VOUT3
16
EN2
15
EN3
14
NC
13
NC
TOP VIEW
(Not to Scale)
ADP323
NOTES
1. NC = NO CONNE
C
T.
2
. CONNECT EXPOSED PAD TO GROUND PLANE.
09288-054
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 NC Not connected internally.
12 GND Ground Pin.
13 NC Not connected internally.
14 NC 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.