LTC4055 Linear Technology, LTC4055 Datasheet - Page 4

• Manufacturer Part Number: LTC4055
• Description: USB Power Controller and Li-Ion Linear Charger
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
LTC4055
temperature range, otherwise specifications are at T
R
SYMBOL
NTC
I
V
V
V
V
Note 1: Absolute Maximum Ratings are those beyond which the life of a
device may be impaired.
Note 2: V
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.
TYPICAL PERFOR A CE CHARACTERISTICS
4
VNTC
VNTC
COLD
HOT
DIS
PROG
600
500
400
200
900
800
700
300
100
0
–50
Input Supply Current
vs Temperature
= R
V
V
R
IN
BAT
CC
PROG
= 5V
CLPROG
–25
is the greater of V
= 4.2V
= R
CLPROG
TEMPERATURE ( C)
0
= 100k, unless otherwise noted.
PARAMETER
V
V
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Voltage
NTC
NTC
= 100k
25
Pin Current
Bias Voltage
IN1
50
, V
OUT
W
75
or V
4055 G01
U
BAT
100
60
50
40
30
20
10
0
–50
A
Input Supply Current
vs Temperature (Suspend Mode)
CONDITIONS
V
I
Rising Threshold
Falling Threshold
Falling Threshold
Rising Threshold
NTC Input Voltage to GND (Falling)
Hysteresis
V
V
R
SUSP = 5V
VNTC
= 25 C. V
VNTC
IN
BAT
PROG
= 5V
–25
= 4.2V
= 500 A
The
= 2.5V
= R
CLPROG
TEMPERATURE ( C)
0
IN1
indicates specifications which apply over the full operating
= V
= 100k
25
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 6: The LTC4055EUF is guaranteed to meet performance
specifications from 0 C to 70 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.
IN2
= 5V, V
50
75
BAT
4055 G02
= 3.5V, HPWR = 5V, WALL = 0V,
100
70
60
50
40
30
20
10
0
–50
MIN
Battery Drain Current vs
Temperature (BAT Powers OUT,
No Load)
1.5
3.4
75
V
V
IN
BAT
= 0V
–25
= 4.2V
0.74 • V
0.72 • V
0.29 • V
0.30 • V
TEMPERATURE ( C)
TYP
100
2.5
3.8
0
50
VNTC
VNTC
VNTC
VNTC
25
MAX
125
3.5
50
75
UNITS
4055 G03
4055p
mA
mV
mV
100
V
V
V
V
V