Datasheet

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