LTC3815_15 Datasheet, PDF(36/42 Page) Linear Technology – 6A Monolithic Synchronous DC/DC Step-Down Converter with Digital Power System Management

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

LTC3815_15 Datasheet, PDF (36/42 Pages) Linear Technology – 6A Monolithic Synchronous DC/DC Step-Down Converter with Digital Power System Management

◁

LTC3815

PMBus Command Details

Table 8. Status Word Bit Descriptions and Conditions

BIT

0 (LSB)

15 (MSB)

DESCRIPTION

None of the Above

Communication Failure

Temperature Fault

VIN Undervoltage Fault

Output Overcurrent Fault

Output Overvoltage Fault

OFF

Busy

Unknown

Other

Fans

PGOOD

Manufacturer Specific

Input Voltage/ Current/Power Fault

Output Current/Power Fault

Output Voltage Fault

CONDITION

If b[15] set due to VOUT undervoltage

(See Note 1)

Temp > 150Â°C

Not Implemented

VOUT > PGOOD High Threshold

No Power to the Output (Note 2)

Not Implemented

Inverted state of PGOOD pin

Not Implemented

VOUT outside PGOOD window

(Note 3)

SET ALERT?

Yes

CLEARABLE BY

WRITING â1â TO BIT?

Yes

Note 1: Communication failure is one of following faults: host sends too

few bits, host reads too few bits, host writes too few bytes, host reads too

many bytes, improper R/W bit set, unsupported command code, attempt

to write to a read-only command. See PMBus Specification v1.2, Part II,

Sections 10.8 and 10.9 for more information.

Note 2: Power may be off due to any one of the following conditions:

RUN_STBY low, OPERATION ON cleared, PVIN undervoltage or

overtemperature warning. When the power is off due to RUN_MSTR

low or due to a more serious fault conditions such as VIN low or

overtemperature fault, the PMBus interface is turned off instead of

asserting the OFF bit.

Note 3: This bit is disabled when drivers are off for any reason, soft-start

not complete, or the VOUT has not reached the PGOOD window for the first

time.

3815p

For more information www.linear.com/LTC3815

▷