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ADP5020ACPZ-R7 Datasheet(PDF) 19 Page - Analog Devices

No. de pieza ADP5020ACPZ-R7
Descripción Electrónicos  Power Management Unit for Imaging Modules
PDF  28 Pages
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
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ADP5020ACPZ-R7 Datasheet(HTML) 19 Page - Analog Devices

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ADP5020
Rev. 0 | Page 19 of
28
POWER-ON SEQUENCE USING THE I2C INTERFACE
When the EN pin is low, the regulator sequence is controlled by
the application processor sending I2C commands to control the
activation. When Bit 4 (EN_ALL) in the REG_CONTROL_
STATUS register (Address 0x03) is set to 1, the regulator sequence
is as follows:
1.
Buck 1
2.
LDO
3.
Buck 2
This sequence can be factory programmed through fuses.
Unused regulators can also be fuse programmed to be turned
off during sequencing.
tREG1
<50µs
tREG2
tREG3
tXSHTDN
VDDx
VUVLOR
VUVLOF
POR
INTERNAL
POR
EN
BUCK 1
BUCK 2
LDO
XSHTDN
I2C BUS
I2C SET/CLEAR
xxx_XSHTDN BITS
Figure 25. Activation and Power Failure Conditions
EN
BK1_EN
= 1
BK2_EN
= 1
FORCE_XS
= 1
FORCE_XS
= 0
BK1_EN,
LDO_EN,
BK2_EN = 0
LD0_EN
= 1
I2C BUS
BUCK 1
BUCK 2
XSHTDN
LDO
Figure 26. Individual Activation Through I2C Commands



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