MIC7400_15 Datasheet, PDF (49/68 Pages) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator Plus One-Boost with HyperLight Load® and I2C Control

Micrel, Inc.
MIC7400
Appendix B
Register Settings Descriptions
Power Good Register (00’h)
This register indicates when the regulators 1 − 6 output voltage is above 91% of the target value. The MIC7400 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
Register Name
Address
PGOOD1-6_REG
Field
bit R/W
Default
PGOOD1
0
R
0
PGOOD2
1
R
0
PGOOD3
2
R
0
PGOOD4
3
R
0
PGOOD5
4
R
0
PGOOD6
5
R
0
Power Good Status Register
0x00’h
Description
Power Good indicator for Regulator 1
0 = Buck Not Valid
1 = Buck Valid
Power Good indicator for Regulator 2
0 = Buck Not Valid
1 = Buck Valid
Power Good indicator for regulator 3
0 = Buck Not Valid
1 = Buck Valid
Power Good indicator for Regulator 4
0 = Buck Not Valid
1 = Buck Valid
Power Good indicator for Regulator 5
0 = Buck Not Valid
1 = Buck Valid
Power Good indicator for Regulator 6
0 = Boost Not Valid
1 = Boost Valid
Reserved
6 R/W
0
Not Used
Reserved
7 R/W
0
Not Used
March 3, 2015
49
Revision 2.0