LTC3589 Linear Technology, LTC3589 Datasheet - Page 36

• Manufacturer Part Number: LTC3589
• Description: 8-Output Regulator
• Manufacturer: Linear Technology

OPERATION
Table 16. LTC3589 Command Register Table
REG
0x07 SCR1
0x10 OVEN
0x12 SCR2
0x20 VCCR
0x21 CLIRQ
0x23 B1DTV1 Step-Down Switching
LTC3589
36
NAME
B[7]
Software
Control Mode:
0 = Enable
with Pin
or OVEN
Register
1 = Enable/
Disable
with OVEN
Register Only
Mask
PGOOD
Hard
Shutdown:
0 = Allow
PGOOD
Timeout
Hard
Shutdown.
1 = Inhibit
PGOOD
Hard
Shutdown.
LDO2
Reference
Select:
0 =
L2DTV1[4-0]
1 =
L2DTV2[4-0]
Regulator Switch DV/DT
Control:
00 = 1ns
01 = 2ns
10 = 4ns
11 = 8ns
B[6]
Buck-Boost
Mode:
0 =
Continuous
1 = Burst
Mode
EN_LDO4
LDO4 Startup:
0 = Wait for
Output <
300mV Before
Enable
1 = Don’t Wait
and Disable
Discharge
Resistor.
Start LDO2
Slew:
0 = Went
1 = GO
B[5]
Step-Down Switching
Regulator 3 Mode :
0 0 = Pulse-Skipping
0 1 = Burst
1 0 = Forced Continuous
EN_LDO3
LDO3
Startup:
0 = Wait
for Output
< 300mV
Before Enable
1 = Don’t Wait
and Disable
Discharge
Resistor.
Step-Down
Switching
Regulator 3
Reference
Select:
0 =
B3DTV1[4-0]
1 =
B3DTV2[4-0]2
PGOOD
Mask:
0 = PGOOD
Low When
Slewing
1 = PGOOD
Not Forced
Low When
Slewing.
B[4]
EN_LDO2
LDO2
Startup:
0 = Wait
for Output
< 300mV
Before
Enable
1 = Don’t Wait
and Disable
Discharge
Resistor.
Start
Step-Down
Switching
Regulator 3
Slew:
0 = Went
1= GO
Step-Down Switching Regulator 1 Feedback Reference Input (V1)
B[3]
Step-Down Switching
Regulator 2 Mode :
0 0 = Pulse-Skipping
0 1 = Burst
1 0 = Forced Continuous
EN4
Buck-Boost
Startup:
0 = Wait
for Output
< 300mV
Before Enable
1 = Don’t Wait
and Disable
Discharge
Resistor.
Step-Down
Switching
Regulator 2
Reference
Select:
0 =
B2DTV1[4-0]
1 =
B2DTV2[4-0]
B[2]
EN3
Step-Down
Switching
Regulator 3
Startup:
0 = Wait
for Output
< 300mV
Before Enable
1 = Don’t Wait
and Disable
Discharge
Resistor.
Start
Step-Down
Switching
Regulator 2
Slew:
0 = Went
1= GO
B[1]
Step-Down Switching
Regulator 1 Mode :
0 0 = Pulse-Skipping
0 1 = Burst
1 0 = Forced Continuous
EN2
Step-Down
Switching
Regulator 2
Startup:
0 = Wait
for Output
< 300mV
Before Enable
1 = Don’t Wait
and Disable
Discharge
Resistor.
Step-Down
Switching
Regulator 1
Reference
Select:
0 =
B1DTV1[4-0]
1 =
B1DTV2[4-0]2
B[0]
EN1
Step-Down
Switching
Regulator 1
Startup:
0 = Wait
for output
< 300mV
Before Enable
1 = Don’t
Wait and
Disable
Discharge
Resistor.
Start
Step-Down
Switching
Regulator 1
Slew:
0 = Went
1= GO
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DEFAULT
0000 0000
0000 0000
0000 0000
0000 0000
0001 1001
3589p