MAX34440 datasheet(30/43 Pages) MAXIM

Part #	MAX34440

Description	PMBus 6-Channel Power-Supply Manager

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

Logo

30 / 43 page

PMBus 6-Channel Power-Supply Manager

30

OT_WARN_LIMIT (51h)

The OT_WARN_LIMIT command sets the temperature, in degrees Celsius, of the selected temperature sensor at which

an overtemperature warning is detected. The 2 data bytes are in DIRECT format. In response to the OT_WARN_LIMIT

being exceeded, the device does the following:

1) Sets the TEMPERATURE bit in STATUS_BYTE.

2) Sets the TEMPERATURE and MFR bits in STATUS_WORD.

3) Sets the OT_WARN bit in STATUS_MFR_SPECIFIC.

4) Notifies the host through ALERT assertion (if enabled in MFR_MODE).

POWER_GOOD_ON (5Eh)

The POWER_GOOD_ON command sets the value of the output voltage that causes the PG output to assert. All enabled

power supplies must be above their associated POWER_GOOD_ON thresholds before the PG output is asserted.

All the enabled power supplies must also be above POWER_GOOD_ON for power-supply margining to begin. The

POWER_GOOD_ON level is normally set higher than the POWER_GOOD_OFF level and VOUT_UV_FAULT_LIMIT. The

2 data bytes are in DIRECT format.

Figure 1. Power-Supply Sequencing

TON_DELAY

OPERATION

COMMAND CODE OR

CONTROL PIN

PSEN PIN

(ACTIVE HIGH OR LOW/

OPEN DRAIN OR PUSH-PULL)

ADC INPUT

POWER_GOOD# BIT IN

STATUS_MFR_SPECIFIC

TON_MAX_FAULT_LIMIT

VOUT_UV_FAULT_LIMIT

TOFF_DELAY

POWER_GOOD_OFF

POWER_GOOD_ON

Similar Part No. - MAX34440

Manufacturer	Part #	Datasheet	Description
Maxim Integrated Produc...	MAX34440	1Mb / 43P	PMBus 6-Channel Power-Supply Manager Rev 2; 2/12
	MAX34440ETL++	1Mb / 43P	PMBus 6-Channel Power-Supply Manager Rev 2; 2/12
	MAX34440ETL++	705Kb / 43P	PMBus 6-Channel Power-Supply Manager 2015
	MAX34440ETL+T	1Mb / 43P	PMBus 6-Channel Power-Supply Manager Rev 2; 2/12
	MAX34440ETL+T	705Kb / 43P	PMBus 6-Channel Power-Supply Manager 2015

Manufacturer	Part #	Datasheet	Description
Maxim Integrated Produc...	MAX34441	2Mb / 53P	PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller Rev 0; 8/10
Maxim Integrated Produc...	MAX34440	1Mb / 43P	PMBus 6-Channel Power-Supply Manager Rev 2; 2/12
Linear Technology	LTC2977	927Kb / 92P	8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement
	LTC2978A	891Kb / 80P	8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement
	LTC2974CUP-PBF	1Mb / 98P	4-Channel PMBus Power System Manager
	LTC2972	2Mb / 112P	2-Channel PMBus Power System Manager Featuring Programmable Power Good Outputs
	LTC2979	243Kb / 20P	16-Channel PMBus Low-Voltage Power System Manager
Maxim Integrated Produc...	MAX34440	705Kb / 43P	PMBus 6-Channel Power-Supply Manager 2015
Maxim Integrated Produc...	MAX34441	1Mb / 53P	PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller 2012
Analog Devices	LTC2977	1Mb / 92P	8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement Rev. F