Datasheet

LP3972
SNVS468K –SEPTEMBER 2006–REVISED MAY 2013 www.ti.com
OUTPUT VOLTAGE ENABLE REGISTER 2
This 8 bit output register enables and disables the output voltages on the LDOs 2,3,4 supplies.
Output Voltage Enable Register 2 (OVER2) 8h’12
Bit 7 6 5 4
(1)
3
(1)
2
(1)
1 0
Designation Reserved LDO4_EN LDO3_EN LDO2_EN Reserved
Reset Value 0 0 0 0 0 0 0 0
(1) One-time factory programmable EPROM registers for default values
Output Voltage Enable Register 2 (OVER2) 8h’12 Definitions
Bit Access Name Description
7 — — Reserved
6 — — Reserved
5 — — Reserved
4 R/W LDO4_EN LDO4 Output Voltage Enable
0 = LDO4 Supply Output Disabled, Default
1 = LDO4 Supply Output Enabled
3 R/W LDO3_EN LDO3 Output Voltage Enable
0 = LDO3 Supply Output Disabled, Default
1 = LDO3 Supply Output Enabled
2 R/W LDO2_EN LDO2 Output Voltage Enable
0 = LDO2 Supply Output Disabled, Default
1 = LDO2 Supply Output Enabled
1 — — Reserved
0 — — Reserved
OUTPUT VOLTAGE STATUS REGISTER 2
Output Voltage Status Register 2 (OVSR2) 8h’13
Bit 7 6 5 4 3 2 1 0
Designation LDO_OK N/A N/A LDO4_OK LDO3_OK LDO2_OK N/A N/A
Reset Value 0 0 0 0 0 0 0 0
Output Voltage Status Register 2 (OVSR2) 8h’13 Definitions
Bit Access Name Description
7 R LDO_OK LDOs 2-4 Supply Output Voltage Status
0 - (LDOs 2-4) output voltage < 90% of selected value
1 - (LDOs 2-4) output voltage > 90% of selected value
6 — — Reserved
5 — — Reserved
4 R LDO4_OK LDO4 Output Voltage Status
0 - (V
CC
_LDO4) output voltage < 90% of selected value
1 - (V
CC
_LDO4) output voltage > 90% of selected value
3 R LDO3_OK LDO3 Output Voltage Status
0 - (V
CC
_LDO3) output voltage < 90% of selected value
1 - (V
CC
_LDO3) output voltage > 90% of selected value
2 R LDO2_OK LDO2 Output Voltage Status
0 - (V
CC
_LDO2) output voltage < 90% of selected value
1 - (V
CC
_LDO2) output voltage > 90% of selected value
1 — — Reserved
0 — — Reserved
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