LP3972SQ-I514EV National Semiconductor, LP3972SQ-I514EV Datasheet - Page 41

• Manufacturer Part Number: LP3972SQ-I514EV
• Description: BOARD EVALUATION LP3972SQ-I514
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3972SQ-I514EV

• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 9, Non-Isolated
• Voltage - Input: 2.7 ~ 5.5V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: LP3972
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Voltage - Output: -
• Power - Output: -
• Frequency - Switching: -

Designation
Reset Value
LOGIC OUTPUT ENABLE REGISTER (LOER) 8H’84
Note: ** denotes one time factory programmable EPROM registers for default values
LOGIC OUTPUT ENABLE REGISTER (LOER) DEFINITIONS 8H’84
Bit
7
6
5
4
3
2
1
0
Bit
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
Reserved
7
0
B3ENC
B2ENC
B1ENC
Name
L5EC
L4EC
L3EC
L2EC
—
B3ENC
6*
1
Reserved
Connects Buck3 enable to SYS_EN or PWR_EN Logic Control pin
0 - Buck3 enable connected to PWR_EN
1 - Buck3 enable connected to SYS_EN, Default
Connects Buck2 enable to SYS_EN or PWR_EN Logic Control pin
0 - Buck2 enable connected to PWR_EN
1 - Buck2 enable connected to SYS_EN, Default
Connects Buck1 enable to SYS_EN or PWR_EN Logic Control pin
0 - Buck1 enable connected to PWR_EN, Default
1 - Buck1 enable connected to SYS_EN
Connects LDO5 enable to SYS_EN or PWR_EN Logic Control pin
0 - LDO5 enable connected to PWR_EN, Default
1 - LDO5 enable connected to SYS_EN
Connects LDO4 enable to SYS_EN or PWR_EN Logic Control pin
0 - LDO4 enable connected to PWR_EN
1 - LDO4 enable connected to SYS_EN, Default
Connects LDO3 enable to SYS_EN or PWR_EN Logic Control pin
0 - LDO3 enable connected to PWR_EN
1 - LDO3 enable connected to SYS_EN, Default
Connects LDO2 enable to SYS_EN or PWR_EN Logic Control pin
0 - LDO2 enable connected to PWR_EN
1 - LDO2 enable connected to SYS_EN, Default
B2ENC
5*
1
41
B1ENC
4*
0
Description
L5EC
3*
0
L4EC
2*
1
L3EC
1*
1
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L2EC
0*
1