PXE1110C

PDS-PXE1-PXM1-C-001A

8

Pin #

Name

I/O

Type

Description

10

AVREN

I

1.2V CMOS

Note G

Active high Output Enable input. Asserting the AVREN pin will activate the

digital controller, pending status of the internal power-on-reset circuit and

any existing fault states. De-asserting then asserting AVREN after a

latched-fault based shutdown will cause the controller to enter the soft-

start state. Faults will be cleared when AVREN is reasserted.

11

VRHOT#

O

Open Drain

Active low external temperature indicator. VRHOT# is asserted at the

temperature defined by the programmable TEMP_MAX register.

12

PINALRT#

O

Open Drain

Active low external input supply power alert. PINALRT# is asserted when

the input power reaches the threshold defined by the programmable

PIN_MAX register. Unused PINALRT# may be left open.

13

MP0

I/O

Note D

Multi-purpose pin-0 configurable as BVRRDY, FAULT1, FAULT2,

ADREN, BDREN, or LPM. Unused MP pins may be left open. Note F

14

MP1

I/O

Note D

Multi-purpose pin-1 configurable as BVREN, BVRRDY, FAULT1,

FAULT2, ADREN, BDREN, or SMBAlert#. Note F

15

VCLK

I

1.2V CMOS

SVID clock interface. Note E

16

VDIO

I/O

Open Drain

SVID bi-directional data interface. Note E

17

VALRT#

O

Open Drain

SVID active low ALERT# signal. This output is asserted to indicate the

status of the VR has changed. Note E

18

MP2

I/O

Note D

Multi-purpose pin-2 configurable as FAULT2, SMBAlert#, or IMON. Note

F

19

AVSEN

I

Analog

Loop_A voltage sense inputs. AVSEN (+) and AVREF (-) are inputs to the

precision differential remote sense amplifier and should be connected to

the sense pins of the remote load. To attenuate high frequency noise

coupled onto the sense lines, it is recommended that an RC filter (10Ω

and 220pF) be placed close to the controller.

20

AVREF

I

Analog

21

AIREF1

I

Analog

Loop_A phase #1 current sense inputs. The AIREF1 (-) and AISEN1 (+)

pins are used to differentially sense the corresponding channel current.

The sensed current is used for channel-to-channel current balancing,

loadline regulation, and over-current protection. Unused AIREFx/AISENx

pins may be left open or tied to ground.

22

AISEN1

I

Analog

23

GND

Tie pin directly to GND (no internal connection to GND).

24

DNC

Do not connect (leave floating).

25

BIREF1

I

Analog

Loop_B current sense inputs. Refer to AIREF1/AISEN1 description. If

Loop_B is not used, these pins may be left open/grounded.

26

BISEN1

I

Analog

27

GND

Tie pin directly to GND (no internal connection to GND).

28

DNC

Do not connect (leave floating).

29

BVSEN

I

Analog

Loop_B voltage sense inputs. Refer to AVSEN/AVREF description.

30

BVREF

I

Analog

31

MP3

I/O

Note D

Multi-purpose pin-3 configurable as FAULT2 or SMBAlert#. Note F

32

MP4

I/O

Note D

Multi-purpose pin-4 configurable as FAULT1 or SMBAlert#. Note F

33

XADDR2

I

Analog

Used in conjunction with XADDR1, the I2C address of the controller is set

by tying an external resistor between this pin and GND.

34

BTSEN

I

Analog

Loop_B external temperature sense input. Refer to ATSEN description.