LTC4098/LTC4098-1
4
40981fc
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
PROG
PROG Pin Servo Voltage 1.000 V
V
PROG,TRKL
PROG Pin Servo Voltage in Trickle
Charge
BAT < V
TRKL
0.100 V
h
PROG
Ratio of I
BAT
to PROG Pin Current 1030 mA/mA
V
TRKL
Trickle Charge Threshold Voltage BAT Rising 2.7 2.85 3 V
ΔV
TRKL
Trickle Charge Hystersis Voltage 130 mV
V
RECHRG
Recharge Battery Threshold Voltage Threshold Voltage Relative to V
FLOAT
–80 –100 –120 mV
t
TERM
Safety Timer Termination Period Timer Starts When BAT = V
FLOAT
3.4 4 4.6 Hour
t
BADBAT
Bad Battery Termination Time BAT < V
TRKL
0.43 0.5 0.58 Hour
h
C/10
End of Charge Indication Current Ratio (Note 5) 0.09 0.1 0.11 mA/mA
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 5mA 65 100 mV
I
CHRG
CHRG Pin Input Current BAT = 4.5V, V
CHRG
= 5V 0 1 μA
R
ON_CHG
Battery Charger Power FET
On-Resistance (Between V
OUT
and BAT)
I
BAT
= 200mA 0.18
Ω
T
LIM
Junction Temperature in Constant-
Temperature Mode
110 °C
NTC
V
COLD
Cold Temperature Fault Threshold
Voltage
Rising Threshold
Hysteresis
75.0 76.5
1.5
78.0 %NTCBIAS
%NTCBIAS
V
HOT
Hot Temperature Fault Threshold
Voltage
Falling Threshold
Hysteresis
33.4 34.9
1.5
36.4 %NTCBIAS
%NTCBIAS
V
DIS
NTC Disable Threshold Voltage Falling Threshold
Hysteresis
0.7 1.7
50
2.7 %NTCBIAS
mV
I
NTC
NTC Leakage Current NTC = 5V –50 50 nA
Ideal Diode
V
FWD
Forward Voltage Detection I
VOUT
= 10mA 15 mV
R
DROPOUT
Internal Diode On-Resistance, Dropout I
VOUT
= 200mA 0.18
Ω
I
MAX
Diode Current Limit 2 A
Logic (D0, D1, D2)
V
IL
Input Low Voltage 0.4 V
V
IH
Input High Voltage 1.2 V
I
PD
Static Pull-Down Current V
PIN
= 1V 2 μA
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 LTC4098E/LTC4098E-1 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: The LTC4098E/LTC4098E-1 include 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 or
permanently damage the device.
Note 4: Total input current, I
VBUS(LIM)
, is equal to I
VBUSQ
+ (V
CLPROG
/
R
CLPROG
) • (h
CLPROG
+ 1).
Note 5: h
C/10
is expressed as a fraction of measured full charge current
with a 5k PROG resistor.
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, R
CLPROG
= 3.01k, unless otherwise noted.
