Datasheet

LTC3589/LTC3589-1/
LTC3589-2
40
3589ff
For more information www.linear.com/3589
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] DEFAULT
0x26 B2DTV1 Unused PGOOD
Mask:
0 = PGOOD
Low When
Slewing
1 = PGOOD
Not Forced
Low When
Slewing.
Step-Down Switching Regulator 2 Feedback Reference Input (V1)
00000 = 362.5mV
11001 = 675mV
11111 = 750mV
12.5mV Step Size
0001 1001
0x27 B2DTV2 Keep-Alive
Mode:
0 = Normal
Shutdown
1 = Keep-Alive
Phase
Select:
0 = Clock
Phase 1
1 = Clock
Phase 2
Step-Down
Switching
Regulator 2
Clock Rate
0 = 2.25MHz
1 = 1.125MHz
Step-Down Switching Regulator 2 Feedback Reference Input (V2)
00000 = 362.5mV
11001 = 675mV
11111 = 750mV
12.5mV Step Size
0001 1001
0x29 B3DTV1 Unused PGOOD
Mask:
0 = PGOOD
Low When
Slewing
1 = PGOOD
Not Forced
Low When
Slewing.
Step-Down Switching Regulator 3 Feedback Reference Input (V1)
00000 = 362.5mV
11001 = 675mV
11111 = 750mV
12.5mV Step Size
0001 1001
0x2A B3DTV2 Keep-Alive
Mode:
0 = Normal
Shutdown
1 = Keep-Alive
Phase
Select:
0 = Clock
Phase 1
1 = Clock
Phase 2
Step-Down
Switching
Regulator 3
Clock Rate
0 = 2.25MHz
1 = 1.125MHz
Step-Down Switching Regulator 3 Feedback Reference Input (V2)
00000 = 362.5mV
11001 = 675mV
11111 = 750mV
12.5mV Step Size
0001 1001
0x32 L2DTV1 Keep-Alive
Mode:
0 = Normal
Shutdown
1 = Keep-Alive
Unused PGOOD
Mask:
0 = PGOOD
Low When
Slewing
1 = PGOOD
Not Changed
When
Slewing.
LDO 2 Feedback Reference Input (V1)
00000 = 362.5mV
11001 = 675mV
11111 = 750mV
12.5mV Step Size
0001 1001