9.3 Feature Description
9.3.1 Ship Mode
Ship Mode is the lowest quiescent current state for the device. Ship Mode latches off the device and BAT FET
until V
IN
> V
BAT
+ V
SLP
or the MR button is depressed for t
WAKE1
and released. The following list shows the
events that are active during Ship Mode:
1. VIN_UV Comparator
2. MR Input (No clock or delay in this mode for lowest power consumption)
3. PMID active pull down
9.3.1.1 Ship Mode Entry and Exit
The device may only enter Ship Mode when there is not a valid VIN supply present (V
IN
< V
UVLO
). Once the
IN supply is removed there are two ways for the device to enter Ship Mode: through I
2
C command using the
EN_SHIPMODE bit and by doing a long button press when MRREC bit is set to 0. If the EN_SHIPMODE
bit is set while the IN supply is present, the device will enter Ship Mode upon removal of the supply. The
EN_SHIPMODE bit can be cleared using the I
2
C interface as well while the IN input is valid.
In addition to V
IN
< V
UVLO
, CD and MR must be high. Once all of these conditions are met the device will begin
the transition to Ship Mode. All three conditions must remain unchanged for a period of t
QUIET
to ensure proper
operation.
show the correct sequencing to ensure proper entry into the Ship Mode
through I
2
C command and MR button press respectively.
VIN
MR
CD
Shipmode
I
2
C
Write
xxxxxx
xxxxxx
xx
t
QUIET
Figure 9-1. CD, MR and VIN Sequencing for Ship Mode Entry Through I
2
C Command
VIN
MR
CD
Shipmode
I
2
C
Write
xxxxxx
xxxxxx
t > t
RESET
t
QUIET
Figure 9-2. CD, MR and VIN Sequencing for Ship Mode Entry Through Long MR Button Press
SLUSDI4A – OCTOBER 2018 – REVISED APRIL 2021
18
Copyright © 2022 Texas Instruments Incorporated
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