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LP3971 数据表(PDF) 29 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LP3971
功能描述  POWER MANAGEMENT UNIT FOR ADVANCED APPLICATION PROCESSORS
PDF  42 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP3971 数据表(HTML) 29 Page - National Semiconductor (TI)

Back Button LP3971 Datasheet HTML 25Page - National Semiconductor (TI) LP3971 Datasheet HTML 26Page - National Semiconductor (TI) LP3971 Datasheet HTML 27Page - National Semiconductor (TI) LP3971 Datasheet HTML 28Page - National Semiconductor (TI) LP3971 Datasheet HTML 29Page - National Semiconductor (TI) LP3971 Datasheet HTML 30Page - National Semiconductor (TI) LP3971 Datasheet HTML 31Page - National Semiconductor (TI) LP3971 Datasheet HTML 32Page - National Semiconductor (TI) LP3971 Datasheet HTML 33Page - National Semiconductor (TI) Next Button
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I
2C Register Definitions (Continued)
BUCK 3 VOLTAGE RAMP CONTROL REGISTER (B3RC) 8h’34
Bit
7654
3210
Designation
Reserved
Ramp Rate
Reset Value
0000
1010
BUCK 2 VOLTAGE RAMP CONTROL REGISTER (B2RC) 8h’34 DEFINITIONS
Bit
Access
Name
Description
7:5
...
...
Reserved
4:0
R/W
B2RS
DVM Ramp Speed
Data Code
Ramp Rate
(mV/µs)
4h’0
Instant
4h’1
1
4h’2
2
4h’3
3
4h’4
4
4h’5
5
4h’6
6
4h’7
7
4h’8
8
4h’9
9
4h’A
10
BUCK FUNCTION REGISTER (BFR) 8h’38
Bit
76543
2
1
0
Designation
Reserved
SHBU
BK_SLOMOD
BK_SSEN
Reset Value
00000
0
1
0
BUCK FUNCTION REGISTER (BFR) 8h’38 DEFINITIONS
Bit
Access
Name
Description
7:3
...
...
Reserved
SHBU
Shut down Back up battery to prevent battery drain during shipping
0 = Back up Battery Enabled
1 = Back up Battery Disabled
1
R
BK_SLOMOD
Buck Spread Spectrum Modulation Buck 1–3
0 = 10 kHz triangular wave spread spectrum modulation
1 = 2 kHz triangular wave spread spectrum modulation
0
R
BK_SSEN
Spread spectrum function Buck 1–3
0 = SS Output Disabled
1 = SS Output Enabled
www.national.com
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