LP3971 Datasheet, PDF (32/57 Pages) National Semiconductor (TI) – POWER MANAGEMENT UNIT FOR ADVANCED APPLICATION PROCESSORS

LP3971
SNVS432U – JANUARY 2006 – REVISED OCTOBER 2008
Bit
Access
4:0
R/W
Name
B2RS
DVM Ramp Speed
Data Code
4h'0
4h'1
4h'2
4h'3
4h'4
4h'5
4h'6
4h'7
4h'8
4h'9
4h'A
Description
Ramp Rate
(mV/µs)
Instant
1
2
3
4
5
6
7
8
9
10
BUCK 3 TARGET VOLTAGE 1 REGISTER (B3TV1) 8H'32
Bit
7
6
5
Designation
Reserved
Reset Value
0
0
0
4
3
2
1
Buck 3 Output Voltage (B3OV)**
1**
0**
1**
0**
BUCK 3 TARGET VOLTAGE 1 REGISTER (B3TV1) 8H'32 DEFINITIONS
Bit
Access
7:5
—
4:0
R/W
Name
—
B3OV
Reserved
Output Voltage
Data Code
5h'01
5h'02
5h'03
5h'04
5h'05
5h'06
5h'07
5h'08
5h'09
5h'0A
5h'0B
5h'0C
Description
(V)
Data Code
0.80
5h'0D
0.85
5h'0E
0.90
5h'0F
0.95
5h'11
1.00
5h'12
1.05
5h'13
1.10
5h'14
1.15
5h'15
1.20
5h'16
1.25
5h'17
1.30
5h'18
1.35
5h'19
BUCK 3 TARGET VOLTAGE 2 REGISTER (B3TV2) 8H'33
Bit
7
6
5
Designation
Reserved
Reset Value
0
0
0
4
3
2
1
Buck 2 Output Voltage (B2OV)**
1**
0**
1**
0**
BUCK 3 TARGET VOLTAGE 2 REGISTER (B3TV2) 8H'33 DEFINITIONS
Bit
Access
7:5
—
Name
—
Reserved
Description
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0
0**
(V)
1.40
1.45
1.50
1.60
1.65
1.70
1.80
1.90
2.50
2.80
3.00
3.30
0
0**
32
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