Datasheet

Data Sheet ADP5040
Rev. 0 | Page 7 of 40
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
14
13
12
1
3
4
VOUT2
15 FB2
VIN2
FB1
11
VOUT1
FB3
VIN3
2
VOUT3
EN3
5
NC
7
VIN1
6
AVIN
8
SW
9
PGND
10
EN1
19
NC
20
NC
18
NC
17
MODE
16
EN2
ADP5040
TOP VIEW
(Not to Scale)
NOTES
1. EXPOSED PAD MUST BE CONNECTED TO
SYSTEM GROUND PLANE.
09665-002
Figure 2. Pin Configuration—View from Top of the Die
Table 7. Preliminary Pin Function Descriptions
Pin No. Mnemonic Description
1 FB3 LDO2 Feedback Input.
2 VOUT3 LDO2 Output Voltage.
3 VIN3 LDO2 Input Supply (1.7 V to 5.5 V).
4 EN3 Enable LDO2. EN3 = high: turn on LDO2; EN3 = low: turn off LDO2.
6 AVIN Housekeeping Input Supply (2.3 V to 5.5 V).
7 VIN1 Buck Input Supply (2.3 V to 5.5 V).
8 SW Buck Switching Node.
9 PGND Dedicated Power Ground for Buck Regulator.
10 EN1 Enable Buck. EN1 = high: turn on buck; EN1 = low: turn off buck.
11 VOUT1 Buck Output Sensing Node.
12 FB1 Buck Feedback Input.
13 VIN2 LDO1 Input Supply (1.7 V to 5.5 V).
14 VOUT2 LDO1 Output Voltage.
15 FB2 LDO1 Feedback Input.
16 EN2 Enable LDO1. EN2 = high: turn on LDO1; EN2 = low: turn off LDO1.
17 MODE
Buck Mode. Mode = high: buck regulator operates in fixed PWM mode; mode = low: buck regulator operates in
power save mode (PSM) at light load and in constant PWM at higher load.
5, 18, 19, 20 NC Not Connected.
0 EPAD Exposed Pad. ( AGND = Analog Ground). The exposed pad must be connected to the system ground plane.