LP3971SQ-G824/NOPB National Semiconductor, LP3971SQ-G824/NOPB Datasheet - Page 30

• Manufacturer Part Number: LP3971SQ-G824/NOPB
• Description: IC PMU MULTI FUNCT PROGR 40-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3971SQ-G824/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
• For Use With: LP3971SQ-B410EV - BOARD EVALUATION LP3971SQ-B410
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP3971SQ-G824TR

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Designation
Reset Value
Designation
Reset Value
LDO OUTPUT VOLTAGE ENABLE REGISTER (LDOEN) 8H'12
Note: ** denotes EPROM programmable registers for default value.
LDO OUTPUT VOLTAGE ENABLE REGISTER (LDOEN) 8H'12 DEFINITIONS
LDO OUTPUT VOLTAGE STATUS REGISTER (LDOVS) 8H'13
LDO OUTPUT VOLTAGE STATUS REGISTER (LDOVS) 8H'13 DEFINITIONS
Bit
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
Bit
Bit
Access
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—
R
R
R
R
L5EC**
0**
LDOS_OK
7
LDO5_OK
LDO4_OK
LDO3_OK
LDO5_EN
LDO4_EN
LDO3_EN
LDO2_EN
LDO1_EN
LDO_OK
Name
Name
L5EC
L4EC
7
0
—
—
L4EC**
0**
6
Connects LDO5 enable to SYS_EN or PWR_EN Logic Control pin
0 = LDO 5 enable connected to PWR_EN
1 = LDO 5 enable connected to SYS_EN
Connects LDO4 enable to SYS_EN or PWR_EN Logic Control pin
0 = LDO 4 enable connected to PWR_EN
1 = LDO 4 enable connected to SYS_EN
LDO_5 Output Voltage Enable
0 = LDO5 Supply Output Disabled
1 = LDO5 Supply Output Enabled
LDO_4 Output Voltage Enable
0 = LDO4 Supply Output Disabled
1 = LDO4 Supply Output Enabled
LDO_3 Output Voltage Enable
0 = LDO3 Supply Output Disabled
1 = LDO3 Supply Output Enabled
LDO_2 Output Voltage Enable
0 = LDO2 Supply Output Disabled
1 = LDO2 Supply Output Enabled
LDO_1 Output Voltage Enable
0 = LDO1 Supply Output Disabled
1 = LDO1 Supply Output Enabled
Reserved
LDO 1–5 Supply Output Voltage Status
0 = (LDO 1–5) output voltage <90% of selected value
1 = (LDO 1–5) output voltage >90% of selected value
Reserved
LDO_5 Output Voltage Status
0 = (V
1 = (V
LDO_4 Output Voltage Status
0 = (V
1 = (V
LDO_3 Output Voltage Status
0 = (V
1 = (V
N/A
6
0
CC
CC
CC
CC
CC
CC
LDO5_EN
_LDO5) output voltage <90% of selected value
_LDO5) output voltage >90% of selected value
_LDO4) output voltage <90% of selected value
_LDO4) output voltage >90% of selected value
_LDO3) output voltage <90% of selected value
_LDO3) output voltage >90% of selected value
LDO5_0K
5
1
5
0
LDO4_EN
LDO4_OK
4
1
30
4
0
LDO3_EN
Description
Description
LDO3_OK
3
1
3
0
LDO2_EN
2
1
LDO2_OK
2
0
LDO1_EN
1
1
LDO1_OK
1
0
Reserved
0
0
N/A
0
0