MAX34440 datasheet(33/43 Pages) MAXIM

Part #	MAX34440

Description	PMBus 6-Channel Power-Supply Manager

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Manufacturer	MAXIM [Maxim Integrated Products]

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PMBus 6-Channel Power-Supply Manager

33

STATUS_VOUT (7Ah)

The STATUS_VOUT command returns 1 byte of information with contents as described in Table 18.

STATUS_CML (7Eh)

The STATUS_CML command returns 1 byte of information with contents as described in Table 19.

STATUS_MFR_SPECIFIC (80h)

The STATUS_MFR_SPECIFIC command returns 1 byte of information with a summary of the reason for a fault. The

STATUS_MFR_SPECIFIC message content is described in Table 20.

Note: The settings of the OFF and POWER_GOOD# bits do not assert the ALERT signal.

Table 20. STATUS_MFR_SPECIFIC

Table 19. STATUS_CML

Table 18. STATUS_VOUT

BIT

BIT NAME

MEANING

7

OFF

This bit is set if the power supply is off (due to either a fault or sequencing delay; this bit is

not set if the power supply is disabled).

6

OT_WARN

Overtemperature warning.

5

OT_FAULT

Overtemperature fault.

4

WATCHDOG

A watchdog reset has occurred.

3

MARGIN_FAULT

This bit is set if the device cannot properly close-loop margin the power supply.

2

POWER_GOOD#

Power-supply voltage has fallen from POWER_GOOD_ON to less than POWER_GOOD_OFF.

1

OC_FAULT

IOUT overcurrent fault.

0

OC_WARN

IOUT overcurrent warning.

BIT

BIT NAME

MEANING

7

COMM_FAULT

An invalid or unsupported command has been received.

6

DATA_FAULT

An invalid or unsupported data has been received.

5:1

0

These bits always return a 0.

0

FAULT_LOG_FULL

MFR_NV_FAULT_LOG is full and needs to be cleared.

BIT

BIT NAME

MEANING

7

VOUT_OV_FAULT

VOUT overvoltage fault.

6

VOUT_OV_WARN

VOUT overvoltage warning.

5

VOUT_UV_WARN

VOUT undervoltage warning.

4

VOUT_UV_FAULT

VOUT undervoltage fault.

3

0

This bit always returns a 0.

2

TON_MAX_FAULT

TON maximum fault.

1:0

0

These bits always return a 0.

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