Datasheet

LTC3676/LTC3676-1
30
3636fa
For more information www.linear.com/LTC3676
REG NAME B[7] B[6] B[5] B[4] B[3] B[2] B[1] B[0] DEFAULT
0x0F DVB3B Reserved Reserved PGOOD Mask:
0 = PGOOD
Low When
Slewing
1 = PGOOD
Not Forced
Low When
Slewing
Buck3 Feedback Reference Input (VB):
00000 = 412.5mV
11001 = 725mV
11111 = 800mV
12.5mV Step
Size
XX01 1001
0x10 DVB4A Reserved Reserved Buck4
Reference.
Select:
0 =
DVB4A[4-0]
1 =
DVB4B[4-0]
Buck4
Feedback Reference Input (VA):
00000 = 412.5mV
11001 = 725mV
11111 = 800mV
12.5mV Step
Size
XX01 1001
0x11 DVB4B Reserved Reserved PGOOD Mask:
0 = PGOOD
Low
When
Slewing
1 = PGOOD
Not Forced
Low When
Slewing
Buck4 Feedback Reference Input (VB):
00000 = 412.5mV
11001 = 725mV
11111 = 800mV
12.5mV Step
Size
XX01 1001
0x12 MSKIRQ Reserved Mask Over-
temperature
Shutdown
Mask Over-
temperature
Warning
Mask
Undervoltage
Shutdown
Mask
Undervoltage
Warning
Mask PGOOD
Timeout
Reserved Mask Push
Button Status
X000 00X0
0x13 MSKPG Allow LDO 4
PGOOD Fault
Allow LDO 3
PGOOD Fault
Allow LDO 2
PGOOD Fault
Not Available Allow Buck 4
PGOOD Fault
Allow Buck 3
PGOOD Fault
Allow Buck 2
PGOOD Fault
Allow Buck 1
PGOOD Fault
1111 1111
0x14 USER User Bit 7 User Bit 6 User Bit 5 User Bit 4 User Bit 3 User Bit 2 User Bit 1 User Bit 0 0000 0000
0x1E HRST Hard Reset Command. No Data.
0x1F CLIRQ Clear IRQ Command. No Data
Table 22. LTC3676 Status Registers
REG NAME B[7] B[6] B[5] B[4] B[3] B[2] B[1] B[0]
0x15 IRQSTAT Reserved Over-
temperature
Shutdown
Over-
temperature
Warning
Undervoltage
Shutdown
Undervoltage
Warning
PGOOD
Timeout
Hard Reset Pushbutton
Status (Real
Time)
0x16 PGSTATL LDO4 PGOOD
Hold 1ms
LDO3 PGOOD
Hold 1ms
LDO2 PGOOD
Hold 1ms
LDO1 PGOOD
Hold 1ms
Buck4 PGOOD
Hold 1ms
Buck3 PGOOD
Hold 1ms
Buck2 PGOOD
Hold 1ms
Buck1 PGOOD
Hold 1ms
0x17 PGSTATRT LDO4 PGOOD LDO3 PGOOD LDO2 PGOOD LDO1 PGOOD Buck4 PGOOD Buck3 PGOOD Buck2 PGOOD Buck1 PGOOD
OPERATION