Enterprise / Memory Line

PDS-PXE1-PXM1-C-001A

11

Pin #

Name

I/O

Type

Description

10

AVREN

I

1.2V CMOS

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

AIREF2

I

Analog

Loop_A phase #2 current sense inputs. Refer to AIREF1/AISEN1

description.

24

AISEN2

I

Analog

25

AIREF3

I

Analog

Loop_A phase #3 current sense inputs. Refer to AIREF1/AISEN1

description.

26

AISEN3

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. If

unused, these pins should be grounded or left open.

30

BVREF

I

Analog

31

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.

32

BISEN1

I

Analog

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.

35

ATSEN

I

Analog

Loop_A external temperature sense input. If the digital controllers

’ internal

temperature sensor is selected and/or the external temperature reporting is

not required, the ATSEN pin may be left open (floating).