MIC7401 datasheet(49/68 Pages) MICREL

49 / 68 page

Micrel, Inc.

MIC7401

March 16, 2015

Revision 1.0

Appendix B

Power Good Register (00’h)

This register indicates when the regulators 1

− 6 output voltage is above 91% of the target value. The MIC7401 deglitches

the input signal for 50µs in order to prevent false events. The global PG pin indicator is functional ‘AND’ of all the power

good indicators during sequencing. Once the power-up sequence is complete, the global power good output stays high

unless an output falls below its power-good limit, a thermal fault occurs, the input voltage drops below the lower UVLO

threshold or an output is turned OFF by setting the enable register bit to “0” if the PGOOD_MASK[x] bit is set to “0”.

Table 5. Power Good Status Register

PGOOD1-6_REG

Power Good Status Register

Address

0x00’h

Field

bit

R/W

Default

Description

PGOOD1

Power Good Indicator for Regulator 1

0 = Buck Not Valid

1 = Buck Valid

PGOOD2

Power Good Indicator for Regulator 2

0 = Buck Not Valid

1 = Buck Valid

PGOOD3

Power Good Indicator for regulator 3

0 = Buck Not Valid

1 = Buck Valid

PGOOD4

Power Good Indicator for Regulator 4

0 = Buck Not Valid

1 = Buck Valid

PGOOD5

Power Good Indicator for Regulator 5

0 = Buck Not Valid

1 = Buck Valid

PGOOD6

Power Good Indicator for Regulator 6

0 = Boost Not Valid

1 = Boost Valid

Reserved

R/W

Not Used

Reserved

R/W

Not Used

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