ADP5020ACPZ-R7 datasheet(19/28 Pages) AD

部件名	ADP5020ACPZ-R7

功能描述	Power Management Unit for Imaging Modules

PDF	28 Pages

Scroll/Zoom	100%

制造商	AD [Analog Devices]

网页	http://www.analog.com

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19 / 28 page

ADP5020

Rev. 0 | Page 19 of

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:

Buck 1

LDO

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

BUCK 1

BUCK 2

LDO

XSHTDN

I2C BUS

I2C SET/CLEAR

xxx_XSHTDN BITS

Figure 25. Activation and Power Failure Conditions

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

ADP5020ACPZ-R7 数据表(PDF) 19 Page - Analog Devices

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