ADP5034

Data Sheet

Rev. E | Page 8 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

ADP5034

TOP VIEW

(Not to Scale)

AGND

AVIN

VIN1

SW1

PGND1

MODE

FB4

EN4

VIN2

SW2

PGND2

NC

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

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

VIN4

VOUT4

NC

VIN2

EN4

FB4

EN3

VOUT3

FB3

NC

VIN1

AVIN

AGND

SW2

PGND2

NC

FB2

VOUT2

EN2

NC

SW1

PGND1

MODE

FB1

VOUT1

EN1

NC

VIN3

TOP VIEW

(Not to Scale)

ADP5034

NOTES

1. NC = NOT INTERNALLY CONNECTED.

2. IT IS RECOMMENDED THAT THE EXPOSED PAD BE

SOLDERED TO THE GROUND PLANE.

Figure 3. TSSOP Pin Configuration—View from the Top of the Die

Table 8. Pin Function Descriptions

Pin No.

Mnemonic

Description

LFCSP

TSSOP

1

5

FB4

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

middle of the LDO2 resistor divider. For device models with a factory programmed output voltage,

connect FB4 to the top of the capacitor on VOUT4.

2

6

EN4

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

3

7

VIN2

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

4

8

SW2

BUCK2 Switching Node.

5

9

PGND2

Dedicated Power Ground for BUCK2.

6

4, 10, 11,

18, 25

NC

No Connect. Leave this pin unconnected or connect to ground.

7

12

EN2

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

8

13

FB2

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

middle of the BUCK2 resistor divider. For device models with a fixed output voltage, leave this pin

unconnected.

9

14

VOUT2

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

10

15

VOUT1

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

11

16

FB1

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

middle of the BUCK1 resistor divider. For device models with a fixed output voltage, leave this pin

unconnected.

12

17

EN1

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

13

19

MODE

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

operation.

14

20

PGND1

Dedicated Power Ground for BUCK1.

15

21

SW1

BUCK1 Switching Node.

16

22

VIN1

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

17

23

AVIN

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

18

24

AGND

Analog Ground.

19

26

FB3

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

middle of the LDO1 resistor divider. For device models with a factory programmed output voltage,

connect FB3 to the top of the capacitor on VOUT3.

20

27

VOUT3

LDO1 Output Voltage.

21

28

VIN3

LDO1 Input Supply (1.7 V to 5.5 V).

22

1

EN3

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

23

2

VIN4

LDO2 Input Supply (1.7 V to 5.5 V).

24

3

VOUT4

LDO2 Output Voltage.

EPAD

EPAD

EP

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