LP3906SQ-JXXI Datasheet, PDF (27/47 Pages) Texas Instruments – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C ompatible

LP3906
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SNVS456M – AUGUST 2006 – REVISED MAY 2013
BUCK AND LDO STATUS REGISTER (BKLDOSR) – 0X11
This register monitors whether the Bucks and LDOs meet the voltage output specifications.
Name
Access
Data
Reset
D7
D6
BKS_OK
LDOS_OK
R
R
0 – Buck 1-2 0 – LDO 1-2
Not Valid
Not Valid
1 – Bucks Valid 1 – LDOs Valid
0
0
D5
LDO2_OK
R
0 – LDO2 Not
Valid
1 – LDO2 Valid
0
D4
LDO1_OK
R
0 – LDO1 Not
Valid
1 – LDO1 Valid
0
D3
—
—
Reserve
d
0
D2
D1
BK2_OK
—
R
—
0 – Buck2 Not Reserve
Valid
d
1 – Buck2 Valid
0
0
D0
BK1_OK
R
0 – Buck1 Not
Valid
1 – Buck1 Valid
0
BUCK VOLTAGE CHANGE CONTROL REGISTER 1 (VCCR) – 0X20
This register selects and controls the output target voltages for the buck regulators.
Name
Access
Data
D7-6
—
—
Reserved
Reset 00
D5
B2VS
R/W
Buck2 Target Voltage
Select
0 – B2VT1
1 – B2VT2
0
D4
B2GO
R/W
Buck2 Voltage Ramp
CTRL
0 – Hold
1 – Ramp to B2VS
selection
0
D3-2
—
—
Reserved
00
D1
B1VS
R/W
Buck1 Target Voltage
Select
0 – B1VT1
1 – B1VT2
0
D0
B1GO
R/W
Buck1 Voltage Ramp
CTRL
0 – Hold
1 – Ramp to B1VS
selection
0
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