Data Sheet

ADP5037

Rev. D | Page 7 of 28

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

NOTES

1. NC = NOT INTERNALLY CONNECTED.

2. IT IS RECOMMENDED THAT THE EXPOSED PAD

BE SOLDERED TO THE GROUND PLANE.

1

2

3

4

5

6

15

16

17

18

14

13

ADP5037

TOP VIEW

(Not to Scale)

AGND

AVIN

VIN1

SW1

PGND1

MODE

FB4

EN4

VIN2

SW2

PGND2

NC

Figure 2. Pin Configuration—View from the Top of the Die

Table 8. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

FB4

LDO2 Feedback Input. For device models with adjustable output voltage, connect this pin to the middle of the

LDO2 resistor divider. For device models with fixed output voltage, connect this pin to the top of the capacitor on

VOUT4.

2

EN4

LDO2 Enable Pin. High level turns on this regulator, and low level turns it off.

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 or connect to ground.

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, leave this pin unconnected.

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

LDO1 Feedback Input. For device models with adjustable output voltage, connect this pin to the middle of the

LDO1 resistor divider. For device models with fixed output voltage, connect this pin to the top of the capacitor on

VOUT3.

20

VOUT3

LDO1 Output Voltage.

21

VIN3

LDO1 Input Supply (1.7 V to 5.5 V).

22

EN3

LDO1 Enable Pin. High level turns on this regulator, and low level turns it off.

23

VIN4

LDO2 Input Supply (1.7 V to 5.5 V).

24

VOUT4

LDO2 Output Voltage.

EPAD (EP)

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