LTC4055-1_15 Datasheet, PDF (3/24 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
Current Limit
I_LIM
Current Limit
R_ON
ON Resistance V_IN to V_OUT
R_CLPROG = 100k, HPWR = 5V
R_CLPROG = 100k, HPWR = 0V
HPWR = 5V, 400mA Load
HPWR = 0V, 80mA Load
l 465
490
515
mA
l 89
97
105
mA
0.2
Ω
0.2
Ω
V_PROG
Programming Pin Voltage
(PROG, CLPROG)
I_SS
V_CLEN
ΔV_CLEN
V_ALEN
Soft-Start Inrush Current
Input Current Limit Enable Threshold
Input Current Limit Enable Threshold
Automatic Limit Enable Threshold
Voltage
Battery Charger
R_CLPROG = R_PROG = 100k
R_CLPROG = R_PROG = 50k
IN or OUT
V_IN Rising
V_IN Rising – V_IN Falling
(V_IN – V_OUT) V_IN Rising
(V_IN – V_OUT) V_IN Falling
l 0.98
l 0.98
l 3.5
25
–75
1.000
1.000
5
3.8
125
50
– 50
1.02
V
1.02
V
mA/μs
4
V
mV
75
mV
–25
mV
V_FLOAT
I_BAT
I_BAT(MAX)
ΔI_B/ΔI_O
I_TRKL
V_TRKL
V_CENI
V_CENO
V_UVCL
V_RECHRG
t_TIMER
Regulated BAT Voltage
Current Mode Charge Current
Maximum Charge Current
(0°C to 85°C) I_BAT = 2mA (LTC4055)
I_BAT = 2mA (LTC4055)
(0°C to 85°C). I_BAT = 2mA (LTC4055-1)
I_BAT = 2mA (LTC4055-1)
R_PROG = 100k, HPWR = 5V, No Load
R_PROG = 100k, HPWR = 0V, No Load
R_PROG = 100k, V_OUT = 5V, V_IN = 0V,
V_WALL = 2V
R_PROG = 50k, HPWR = 5V, No Load
R_PROG = 50k, V_OUT = 5V, V_IN = 0V,
V_WALL = 2V
(Note 8)
Charge Current Load Dependency
Trickle-Charge Current
Trickle-Charge Threshold Voltage
Input Charger Enable Threshold
Voltage
Output Charger Enable Threshold
Voltage
Input/Output Undervoltage Current Limit
Recharge Battery Threshold Voltage
TIMER Accuracy
Recharge Time
ΔI_BAT/ΔI_OUT, I_OUT = 100mA
V_BAT = 2V, R_PROG = 100k
V_BAT Rising
(V_IN – V_BAT) High to Low
(V_IN – V_BAT) Low to High
(V_OUT – V_BAT) High to Low
(V_OUT – V_BAT) Low to High
I_BAT = I_CHG/2
V_FLOAT – V_RECHRG
C_TIMER = 0.1μF
Percent of Total Charge Time
4.165
l 4.158
4.066
l 4.059
l 445
l 45
l 445
l 900
l 900
l 0.95
30
l 2.7
l 4.23
l 65
4.200
4.200
4.100
4.100
485
80
485
980
980
1
1
45
2.85
70
80
70
80
4.3
100
±10
50
4.235
V
4.242
V
4.134
V
4.141
V
525
mA
110
mA
525
mA
1060
mA
1060
mA
A
1.05 mA/mA
60
mA
3
V
mV
mV
mV
mV
4.37
V
135
mV
%
%
Low Battery Trickle-Charge Time
Percent of Total Charge Time, V_BAT < 2.8V
25
%
T_LIM
Junction Temperature in Constant
Temperature Mode
105
°C
Ideal Diode
R_FWD
R_DIO,ON
V_FWD
V_OFF
I_FWD
I_MAX
On Resistance, V_ON Regulation
V_BAT = 3.5V, 100mA Load
0.1
Ω
On Resistance V_BAT to V_OUT
V_BAT = 3.5V, 600mA Load
0.2
Ω
Voltage Forward Drop (V_BAT – V_OUT)
V_BAT = 3.5V, 5mA Load
V_BAT = 3.5V, 100mA Load
V_BAT = 3.5V, 600mA
l 10
30
50
mV
55
mV
120
mV
Diode Disable Battery Voltage
V_BAT Falling
2.8
V
Load Current Limit for V_ON Regulation V_IN = 3.5V
550
mA
Diode Current Limit
V_BAT = 3.5V, V_OUT = 2.8V, Pulsed with
10% Duty Cycle
1.4
1.8
2.2
A
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