Datasheet

LP3972
SNVS468K –SEPTEMBER 2006–REVISED MAY 2013 www.ti.com
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_BUCK2 TARGET VOLTAGE REGISTER (B2TV) 8H’85
Bit 7 6 5 4
(1)
3
(1)
2
(1)
1
(1)
0
(1)
Designation Reserved Buck2 Output Voltage (B2OV)
Reset Value 0 0 0 1 1 0 0 1
(1) One time factory programmable EPROM registers for default values
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_BUCK2 TARGET VOLTAGE REGISTER (B2TV) 8H’85 DEFINITIONS
Bit Access Name Description
7:5 — Reserved
4:0 R/W B2OV Output Voltage
Data Code (V) Data Code (V)
5h’01 0.80 5h’0D 1.40
5h’02 0.85 5h’0E 1.45
5h’03 0.90 5h’0F 1.50
5h’04 0.95 5h’10 1.55
5h’05 1.00 5h’11 1.60
5h’06 1.05 5h’12 1.65
5h’07 1.10 5h’13 1.70
5h’08 1.15 5h’14 1.80
5h’09 1.20 5h’15 1.90
5h’0A 1.25 5h’16 2.50
5h’0B 1.30 5h’17 2.80
5h’0C 1.35 5h’18 3.00
5h’19 3.30
BUCK3 TARGET VOLTAGE REGISTER (B3TV) 8H’86
Bit 7 6 5 4
(1)
3
(1)
2
(1)
1
(1)
0
(1)
Designation Reserved Buck3 Output Voltage (B3OV)
Reset Value 0 0 0 1 0 1 0 0
(1) One time factory programmable EPROM registers for default values
BUCK3 TARGET VOLTAGE REGISTER (B3TV) 8H’86 DEFINITIONS
Bit Access Name Description
7:5 — Reserved
4:0 R/W B3OV Output Voltage
Data Code (V) Data Code (V)
5h’01 0.80 5h’0D 1.40
5h’02 0.85 5h’0E 1.45
5h’03 0.90 5h’0F 1.50
5h’04 0.95 5h’11 1.60
5h’05 1.00 5h’12 1.65
5h’06 1.05 5h’13 1.70
5h’07 1.10 5h’14 1.80 Default
5h’08 1.15 5h’15 1.90
5h’09 1.20 5h’16 2.50
5h’0A 1.25 5h’17 2.80
5h’0B 1.30 5h’18 3.00
5h’0C 1.35 5h’19 3.30
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_BUCK3:2 VOLTAGE RAMP CONTROL REGISTER (B32RC)
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_Buck3:2 Voltage Ramp Control Register (B32RC) 8h’87
Bit 7 6 5 4 3 2 1 0
Designation Ramp Rate (B3RR) Ramp Rate (B2RR)
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