Datasheet

LTC4090/LTC4090-5
5
4090fc
I
BAT
(mA)
0
4.00
V
FLOAT
(V)
4.05
4.10
4.15
4.20
4.25
4.30
200 400 600 800
4090 G01
1000
R
PROG
= 34k
TEMPERATURE (°C)
–50
V
FLOAT
(V)
4.195
4.200
4.205
25
75
4090 G02
4.190
4.185
4.180
–25 0 50
4.210
4.215
4.220
100
V
IN
= 5V
I
BAT
= 2mA
TIME (MIN)
0
V
BAT
, V
OUT
, V
CHRGB
(V)
I
BAT
(mA)
2
3
200
4090 G03
1
0
50
100
150
5
4
600
900
300
0
1500
1200
V
BAT
V
OUT
V
CHRGB
I
BAT
1250mAh
CELL
HVIN = 12V
R
PROG
= 50k
C/10
TERMINATION
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 LTC4090/LTC4090-5 are guaranteed to meet performance
specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperatures will exceed 110°C when overtemperature protection is
active. Continuous operation above the specifi ed maximum operating
junction temperature may result in device degradation or failure.
Note 4: V
CC
is the greater of V
IN
, V
OUT
, and V
BAT
Note 5: Guaranteed by long term current density limitations.
Note 6: Total input current is equal to this specifi cation plus 1.002 • I
BAT
where I
BAT
is the charge current.
Note 7: Accuracy of programmed current may degrade for currents
greater than 1.5A.
Note 8: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 9: Absolute Maximum Voltage at HVIN and HVEN pins is for
nonrepetative 1 second transients; 40V for continuous operation.
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. HVIN = HVEN = 12V, BOOST = 17V, V
IN
= HPWR = 5V, V
BAT
= 3.7V,
R
PROG
= 100k, R
CLPROG
= 2k and SUSP = 0V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
NTC
I
VNTC
VNTC Pin Current VNTC = 2.5V
l
1.4 2.5 3.5 mA
V
VNTC
VNTC Bias Voltage I
VNTC
= 500μA
l
4.4 4.85 V
I
NTC
NTC Input Leakage Current NTC = 1V 0 ±1 μA
V
COLD
Cold Temperature Fault Threshold
Voltage
Rising NTC Voltage
Hysteresis
0.738 • VNTC
0.02 • VNTC
V
V
V
HOT
Hot Temperature Fault Threshold
Voltage
Falling NTC Voltage
Hysteresis
0.29 • VNTC
0.01 • VNTC
V
V
V
DIS
NTC Disable Threshold Voltage Falling NTC Voltage
Hysteresis
l
75 100
35
125 mV
mV
V
FLOAT
Load Regulation
Battery Regulation (Float)
Voltage vs Temperature
Battery Current and Voltage
vs Time (LTC4090)
TYPICAL PERFORMANCE CHARACTERISTICS