REV. 0

ADP3510

–6–

Table I. LDO Control Logic

Phone Status

State #1 battery

deep discharged

L

XXXXXOFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

State #2 phone off

H

L

XXXXOFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

State #3 phone off,

turn on allowed

H

H

L

H

L

X

OFF

OFF

OFF

OFF

OFF

ON

OFF

OFF

State #4 charger

applied

HHHX

X

L

ON

ON

ON

ON

ON

ON

OFF

** ON

State #5 phone

turned on by user key

H

H

X

L

X

L

ON

ON

ON

ON

ON

ON

OFF

** ON

State #6 phone

turned on by BB

H

H

L

H

H

L

ON

ON

ON

OFF

ON

ON

OFF

ON

State #7 phone and

TCXO LDO kept

on by BB

HHL

HHHON

ON

ON

ON

ON

ON

ON

ON

*UVLO is only active when phone is turned off. UVLO is ignored once the phone is turned on.

**Controlled by TCXOEN.