LTC3589-2_15 Datasheet, PDF (40/50 Pages) Linear Technology – 8-Output Regulator with Sequencing and I2C

LTC3589/LTC3589-1/
LTC3589-2
OPERATION
Table 17. LTC3589 Command Register Table
REG
NAME B[7]
B[6]
B[5]
B[4]
B[3]
B[2]
B[1]
B[0]
0x26
B2DTV1 Unused
PGOOD Mask: Step-Down Switching Regulator 2 Feedback Reference Input (V1)
0 = PGOOD
Low When
Slewing
1 = PGOOD
Not Forced
Low When
Slewing.
00000 = 362.5mV
11001 = 675mV
11111 = 750mV
12.5mV Step Size
0x27
B2DTV2 Keep-Alive Phase
Step-Down Step-Down Switching Regulator 2 Feedback Reference Input (V2)
Mode:
Select:
Switching
0 = Normal 0 = Clock
Shutdown Phase 1
1 = Keep-Alive 1 = Clock
Phase 2
Regulator 2 00000 = 362.5mV
Clock Rate 11001 = 675mV
0 = 2.25MHz ^{11111 = 750mV}
12.5mV Step Size
1 = 1.125MHz
0x29
B3DTV1 Unused
PGOOD Mask: Step-Down Switching Regulator 3 Feedback Reference Input (V1)
0 = PGOOD
Low When
Slewing
1 = PGOOD
Not Forced
Low When
Slewing.
00000 = 362.5mV
11001 = 675mV
11111 = 750mV
12.5mV Step Size
0x2A
B3DTV2 Keep-Alive Phase
Step-Down Step-Down Switching Regulator 3 Feedback Reference Input (V2)
Mode:
Select:
Switching
0 = Normal 0 = Clock
Shutdown Phase 1
1 = Keep-Alive 1 = Clock
Phase 2
Regulator 3 00000 = 362.5mV
Clock Rate 11001 = 675mV
0 = 2.25MHz ^{11111 = 750mV}
12.5mV Step Size
1 = 1.125MHz
0x32
L2DTV1 Keep-Alive Unused
PGOOD Mask: LDO 2 Feedback Reference Input (V1)
Mode:
0 = Normal
Shutdown
1 = Keep-Alive
0 = PGOOD
Low When
Slewing
00000 = 362.5mV
11001 = 675mV
11111 = 750mV
12.5mV Step Size
1 = PGOOD
Not Changed
When
Slewing.
DEFAULT
0001 1001
0001 1001
0001 1001
0001 1001
0001 1001
40
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