Data Sheet

ADP5023

Rev. A | Page 7 of 28

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

2

1

3

4

5

6

18

17

16

15

14

13

NC

PGND2

NOTES

1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.

2. IT IS RECOMMENDED THAT THE EXPOSED PAD

BE SOLDERED TO THE GROUND PLANE.

SW2

VIN2

GND

GND

MODE

PGND1

SW1

VIN1

AVIN

AGND

ADP5023

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration—View from Top of Die

Table 7. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

AGND

Analog Ground.

2

AGND

Analog Ground.

3

VIN2

BUCK2 Input Supply (2.3 V to 5.5 V). Connect VIN2 to VIN1 and AVIN.

4

SW2

BUCK2 Switching Node.

5

PGND2

Dedicated Power Ground for BUCK2.

6

NC

No Connect. Leave this pin unconnected.

7

EN2

BUCK2 Enable Pin. High level turns on this regulator, and low level turns it off.

8

FB2

BUCK2 Feedback Input. For device models with adjustable output voltage, connect this pin to the middle of the

BUCK2 resistor divider. For device models with fixed output voltage, leave this pin unconnected.

9

VOUT2

BUCK2 Output Voltage Sensing Input. Connect VOUT2 to the top of the capacitor on VOUT2.

10

VOUT1

BUCK1 Output Voltage Sensing Input. Connect VOUT1 to the top of the capacitor on VOUT1.

11

FB1

BUCK1 Feedback Input. For device models with adjustable output voltage, connect this pin to the middle of the

BUCK1 resistor divider. For device models with fixed output voltage, connect this pin to the top of the capacitor

on VOUT3.

12

EN1

BUCK1 Enable Pin. High level turns on this regulator, and low level turns it off.

13

MODE

BUCK1/BUCK2 Operating Mode. MODE = high: forced PWM operation. MODE = low: auto PWM/PSM operation.

14

PGND1

Dedicated Power Ground for BUCK1.

15

SW1

BUCK1 Switching Node

16

VIN1

BUCK1 Input Supply (2.3 V to 5.5 V). Connect VIN1 to VIN2 and AVIN.

17

AVIN

Analog Input Supply (2.3 V to 5.5 V). Connect AVIN to VIN1 and VIN2.

18

AGND

Analog Ground.

19

FB3

LDO Feedback Input. For device models with adjustable output voltage, connect this pin to the middle of the LDO

resistor divider. For device models with fixed output voltage, leave this pin unconnected.

20

VOUT3

LDO Output Voltage.

21

VIN3

LDO Input Supply (1.7 V to 5.5 V).

22

EN3

LDO Enable Pin. High level turns on this regulator, and low level turns it off.

23

AGND

Analog Ground.

24

AGND

Analog Ground.

EPAD (EP)

Exposed Pad. It is recommended that the exposed pad be soldered to the ground plane.