LTC4055-1_15 Datasheet, PDF (4/24 Pages) Linear Technology – USB Power Controller and Li-Ion Charger

LTC4055/LTC4055-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN1 = V_IN2 = 5V, V_BAT = 3.5V, HPWR = 5V, WALL = 0V,
R_PROG = R_CLPROG = 100k, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Logic
V_OL
Output Low Voltage (CHRG, ACPR)
I_SINK = 5mA
l
0.2
0.4
V
V_IH
Enable Input High Voltage
SUSP, SHDN, HPWR Pin Low to High
l
1.2
V
V_IL
Enable Input Low Voltage
SUSP, SHDN, HPWR Pin High to Low
l 0.4
V
I_PULLDN
Logic Input Pull-Down Current
SUSP, SHDN, HPWR
2
μA
V_CHG,SD
Charger Shutdown Threshold Voltage TIMER Falling
on TIMER
l 0.15
0.4
V
I_CHG,SD
Charger Shutdown Pull-Up Current
on TIMER
V_TIMER = 0V
l2
4
μA
V_WALL
V_WALL,HYS
I_WALL
NTC
Wall Input Threshold Voltage
Wall Input Hysteresis
Wall Input Leakage Current
V_WALL Rising Threshold
l 0.98
1.000
1.02
V
V_WALL Rising – V_WALL Falling Threshold
35
mV
V_WALL = 1V
0
±50
nA
I_VNTC
V_VNTC
V_COLD
V_HOT
V_DIS
V_NTC Pin Current
V_NTC Bias Voltage
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Voltage
V_VNTC = 2.5V
I_VNTC = 500μA
Rising Threshold
Falling Threshold
Falling Threshold
Rising Threshold
NTC Input Voltage to GND (Falling)
Hysteresis
l 1.5
2.5
3.5
mA
l 3.4
3.8
V
0.74 • V_VNTC
V
0.72 • V_VNTC
V
0.29 • V_VNTC
V
0.30 • V_VNTC
V
l 75
100
125
mV
50
mV
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: V_CC is the greater of V_IN1, V_OUT or V_BAT.
Note 3: IN1 and IN2 should be tied together with a low impedance to
ensure that the difference between the two pins does not exceed 100mV.
Note 4: All voltage values are with respect to GND.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 6: The LTC4055EUF/LTC4055EUF-1 are 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.
Note 7: Guaranteed by long-term current density limitations.
Note 8: Accuracy of programmed current may degrade for currents greater
than 1A.
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