EN5335QI

3

www.altera.com/enpirion

Pin Descriptions

PIN

NAME

FUNCTION

1-3

NC

NO CONNECT – Do not electrically connect these pins to each other or to

PCB.

4-6

NC(SW)

No Connect. These pins are internally connected to the switch node of the

internal MOSFETs. NC(SW) pins are not to be electrically connected to any

external signal, ground, or voltage.

7

NC

No connect – Do not electrically connect these pins to each other or to PCB.

8-14

VOUT

Regulated converter output. Connect these pins to the load and place output

capacitor from these pins the PGND pins 17-18

15

NC(SW)

No Connect. These pins are internally connected to the switch node of the

internal MOSFETs. NC(SW) pins are not to be electrically connected to any

external signal, ground, or voltage.

16

NC

No connect – Do not electrically connect these pins to each other or to PCB.

17-20

PGND

Output power ground. Connect these pins to the ground electrode of the

output filter capacitors. Refer to layout guideline section.

21-24

PVIN

Input power supply. Connect to input power supply. Decouple with input

capacitor to PGND (pins 19-20).

25-26

NC

No connect – Do not electrically connect these pins to each other or to PCB.

27

ROCP

Optional Over Current Protection adjust pin. Place ROCP resistor between

this pin and AGND (pin 40) to increase the over current trip point by 50%.

28

AVIN

Analog voltage input for the controller circuits. Connect this pin to the input

power supply.

29

AGND

Analog ground for the controller circuits.

30-31

NC

No connect – Do not electrically connect these pins to each other or to PCB.

32

VS2

Voltage select line 2 input. See Table 1.

33

VS1

Voltage select line 1 input. See Table 1.

34

VS0

Voltage select line 0 input. See Table 1.

35

POK

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

is a logic high when VOUT is with -10% to +20% of VOUT nominal.

36

VSENSE

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

to be regulated.

37

SS

Soft-Start node. The soft-start capacitor is connected between this pin and

AGND. The value of this resistor determines the startup timing.

38

EAIN

Optional Error Amplifier input. Allows for customization of the control loop.

39

EAOUT

Optional Error Amplifier output. Allows for customization of the control loop.

40

COMP

Optional Error Amplifier Buffer output. Allows for customization of the control

loop.

41

ENABLE

Input Enable. Applying a logic high, enables the output and initiates a soft-

start. Applying a logic low disables the output.

42-44

NC

No connect – Do not electrically connect these pins to each other or to PCB.

00846

October 11, 2013

Rev J