Datasheet

LTC3577/LTC3577-1
9
3577fa
ELECTRICAL CHARACTERISTICS
Pushbutton Controller. The l denotes the specifi cations which apply
over the full operating temperature range, otherwise specifi cations are at T
A
= 25°C. V
OUT
= 3.8V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Pushbutton Pin (ON)
V
OUT
Pushbutton Operating Supply Range (Note 9)
l
2.7 5.5 V
V
OUT
UVLO V
OUT
Falling
V
OUT
Rising
Pushbutton is Disabled Below V
OUT
UVLO 2.5 2.7
2.8 2.9
V
V
V
ON_TH
ON Threshold Rising
ON Threshold Falling 0.4
0.8
0.7
1.2 V
V
I
ON
ON Input Current V
ON
= V
OUT
V
ON
= 0V
–1
–4 –9
1
–14
A
A
Power-On Input Pin (PWR_ON)
V
PWR_ON
PWR_ON Threshold Rising
PWR_ON Threshold Falling 0.4
0.8
0.7
1.2 V
V
I
PWR_ON
PWR_ON Input Current V
PWR_ON
= 3V –1 1 A
Status Output Pins (PBSTAT, WAKE, PG_DCDC)
I
PBSTAT
PBSTAT Output High Leakage Current V
PBSTAT
= 3V –1 1 A
V
PBSTAT
PBSTAT Output Low Voltage I
PBSTAT
= 3mA 0.1 0.4 V
I
WAKE
Wake Output High Leakage Current V
WAKE
= 3V –1 1 A
V
WAKE
Wake Low Output Voltage I
WAKE
= 3mA 0.1 0.4 V
I
PG_DCDC
PG_DCDC Output High Leakage Current V
PG_DCDC
= 3V –1 1 A
V
PG_DCDC
PG_DCDC Output Low Voltage I
PG_DCDC
= 3mA 0.1 0.4 V
V
THPG_DCDC
PG_DCDC Threshold Voltage (Note 13) –8 %
Pushbutton Timing Parameters
t
ON_PBSTAT1
ON Low Time to PBSTAT Low WAKE High 50 ms
t
ON_PBSTAT2
ON High to PBSTAT High PBSTAT Low > t
PBSTAT_PW
900 s
t
ON_WAKE
ON Low Time to WAKE High WAKE Low > t
PWR_ONBK2
400 ms
t
ON_HR
ON Low to Hard Reset Hard Reset = All Supplies Disabled 4.2 5 5.8 Seconds
t
PBSTAT_PW
PBSTAT Minimum Pulse Width 40 50 60 ms
t
WAKE_EXTP
WAKE High from USB or Wall Present WAKE Low > t
PWR_ONBK2
100 ms
t
WAKE_DCDC
WAKE High to Buck1 Enable WAKE Low > t
PWR_ONBK2
5µs
t
PWR_ONH
PWR_ON High to WAKE High WAKE Low > t
PWR_ONBK2
50 ms
t
PWR_ONL
PWR_ON Low to WAKE Low WAKE High > t
PWR_ONBK1
50 ms
t
PWR_ONBK1
PWR_ON Power-Up Blanking WAKE Rising Until PWR_ON Low Recognized 5 Seconds
t
PWR_ONBK2
PWR_ON Power-Down Blanking WAKE Falling Until PWR_ON High Recognized 1 Seconds
t
PG_DCDCH
Bucks in Regulation to PG_DCDC High All Bucks Within PG_DCDC Threshold Voltage 230 ms
t
PG_DCDCL
Bucks Disabled to PG_DCDC Low All Bucks Disabled 44 s