LTC3554 Datasheet, PDF (5/36 Pages) Linear Technology – Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators

LTC3554
PUSHBUTTON INTERFACE ELECTRICAL CHARACTERISTICS
The l denotes specifications that apply over the full operating temperature range, otherwise specifications are at T_A = 25°C.
V_BAT = 3.8V unless otherwise noted.
SYMBOL PARAMETER
Pushbutton Pin (ON)
CONDITIONS
MIN TYP MAX UNITS
V_{CC_PB}
V_{ON_TH}
I_ON
Pushbutton Operating Supply Range
ON Threshold Rising
ON Threshold Falling
ON Input Current
(Notes 4 , 9)
V_ON = V_CC (Note 4)
l 2.7
5.5
V
0.8
1.2
V
0.4
0.7
V
–1
1
μA
R_{PB_PU}
Pushbutton Pull-Up Resistance
Logic Input Pins (PWR_ON1, PWR_ON2)
Pull-Up to V_CC (Note 4)
200 400
600
kΩ
V_{PWR_ONx}
PWR_ONx Threshold Rising
PWR_ONx Threshold Falling
0.8
1.2
V
0.4
0.7
V
I_{PWR_ONx}
PWR_ONx Input Current
Status Output Pins (PBSTAT, PGOOD)
–1
1
μA
I_PBSTAT
PBSTAT Output High Leakage Current V_PBSTAT = 3V
–1
1
μA
V_PBSTAT
PBSTAT Output Low Voltage
I_PBSTAT = 3mA
0.1
0.4
V
I_PGOOD
PGOOD Output High Leakage Current V_PGOOD = 3V
–1
1
μA
V_PGOOD
PGOOD Output Low Voltage
I_PGOOD = 3mA
0.1
0.4
V
V_THPGOOD PGOOD Threshold Voltage
(Note 10)
–8
%
Pushbutton Timing Parameters (Note 11)
t_{ON_PBSTATL} Minimum ON Low Time to Cause PBSTAT ON Brought Low During Power-On (PON) or
50
ms
Low
Power-Up (PUP1, PUP2) States
t_{ON_PBSTATH} Delay from ON High to PBSTAT High
Power-On (PON) State, After PBSTAT Has
Been Low for at Least t_{PBSTAT_PW}
900
μs
t_{ON_PUP}
Minimum ON Low Time to Enter
Starting in the Hard Reset (HR) or Power-Off
400
ms
Power-Up (PUP1 or PUP2) State
(POFF) States
t_{ON_HR}
Minimum ON Low Time to Hard Reset ON Brought Low During the Power-On (PON)
4
5
6
s
or Power-Up (PUP1, PUP2) States
t_{PBSTAT_PW} PBSTAT Minimum Pulse Width
Power-On (PON) or Power-Up (PUP1, PUP2)
40
50
ms
States
t_EXTPWR
Power-Up from USB Present to Power-Up Starting in the Hard Reset (HR) or Power-Off
100
ms
(PUP1 or PUP2) State
(POFF) States
t_{PON_UP}
Any PWR_ONx High to Power-On State Starting With Both PWR_ONx Low in the
Power-Off (POFF) State
900
μs
t_{PON_DIS}
t_PUP
t_PDN
PWR_ONx Low to Buckx Disabled
Power-Up (PUP1 or PUP2) State Duration
Power-Down (PDN1 or PDN2) State
Duration
1
μs
5
s
1
s
t_PGOODH
Bucks in Regulation to PGOOD High
All Enabled Bucks Within PGOOD Threshold
230
ms
Voltage
t_PGOODL
Bucks Disabled to PGOOD Low
All Bucks Disabled
100
μs
Note 1. Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2. The LTC3554 is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and
correlation with statistical process controls.
3554p
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