Rev 1.0 – July 2005

www.enpirion.com

EN5330

6

Pin Descriptions

PIN

NAME

FUNCTION

1

COMP

Output of the buffer leading to the error amplifier. Used for external modifications of

the compensation network.

2

XFB

External feedback voltage input. Option for programming the output voltage with a

3

VSENSE

Remote voltage sense input. Connect this pin to the load voltage at the point to be

regulated.

4

EAIN

Input of the error amplifier for external modifications of the compensation network.

5

EAOUT

Output of the error amplifier for external modifications of the compensation network.

6

ENABLE

Enable input. An input high enables operation. An input low disables operation.

7

NC

NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.

8

XOV

Over-Voltage set-point input. When using an external voltage divider and the XFB pin. When

VS0, VS1 and VS2 are left OPEN or pulled high, an additional voltage divider separate from

the XFB pin is required to set the OVP set-point. In this mode, the OVP function is disabled if

this voltage divider is not present.

9

10

11

12

PGND

Power ground for the power stage circuits.

13

14

15

16

17

18

VOUT

Voltage and power output.

19

VDRAIN

Test point between the power FETs and Inductor.

20

21

22

23

PGND

Power ground for the power stage circuits.

24

NC

NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.

25

26

27

28

PVIN

Power voltage input for the power stage circuits.

29

VS2

Voltage select line 2 input. See Table 1.

30

ROCP

Over-Current trip point adjust input. Used for adjusting the OCP trip point.

31

VS1

Voltage select line 1 input. See Table 1.

32

AVIN

Analog voltage input for the controller circuits.

33

AGND

Analog ground for the controller circuits.

34

VS0

Voltage select line 0 input. See Table 1.

35

POK

Power OK is an open drain transistor for power system state indication.

36

SS

Soft-Start node. A capacitor is connected between this pin and AGND.

NOTES:

5. This pin is used for engineering test purposes and reserved for future use. Solder, but do not electrically connect this pin to

the PCB.