LP3971SQ-2G16/NOPB National Semiconductor, LP3971SQ-2G16/NOPB Datasheet - Page 31

• Manufacturer Part Number: LP3971SQ-2G16/NOPB
• Description: IC PMU FOR APPL PROCESSORS 40LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3971SQ-2G16/NOPB

• Applications: Processor
• Current - Supply: 60µA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP3971SQ-2G16; LP3971SQ-2G16; LP3971SQ-2G16TR

Designation
Reset Value
VOLTAGE CHANGE CONTROL REGISTER 1 (V
VOLTAGE CHANGE CONTROL REGISTER 1 (V
Bit
Bit
3:2
2
1
0
7
6
5
4
1
0
Access
Access
Bit
R/W
R/W
R/W
R/W
R/W
R/W
—
—
R
R
LDO2_OK
LDO1_OK
B3GO
B2GO
B1GO
Name
Name
B3VS
B2VS
B1VS
—
—
B3VS
7
0
LDO_2 Output Voltage Status
0 = (V
1 = (V
LDO_1 Output Voltage Status
0 = (V
1 = (V
Reserved
Buck 3 Target Voltage Select
0 = Buck 3 Output Voltage to B3TV1
1 = Buck 3 Output Voltage to B3TV2
Start Buck 3 Voltage Change
0 = Hold Buck 3 Output Voltage at current level
1 = Ramp Buck 3 Output Voltage as selected by B3VS
Buck 2 Target Voltage Select
0 = Buck 2 Output Voltage to B2TV1
1 = Buck 2 Output Voltage to B2TV2
Start Buck 2 Voltage Change
0 = Hold Buck 2 Output Voltage at current level
1 = Ramp Buck 2 Output Voltage as selected by B2VS
Reserved
Buck 1 Target Voltage Select
0 = Buck 1 Output Voltage to B1TV1
1 = Buck 1 Output Voltage to B1TV2
Start Buck 1 Voltage Change
0 = Hold Buck 1 Output Voltage at current level
1 = Ramp Buck 1 Output Voltage as selected by B1VS
CC
CC
CC
CC
B3GO
_LDO2) output voltage <90% of selected value
_LDO2) output voltage >90% of selected value
_LDO1) output voltage <90% of selected value
_LDO1) output voltage >90% of selected value
6
0
CC
CC
1) 8H'20
1) 8H'20 DEFINITIONS
B2VS
5
0
31
B2GO
4
0
Description
Description
3
0
Reserved
2
0
B2VS
1
0
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B2GO
0
0