Datasheet

4
LTC1759
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Thermistor Decoder (Note 11)
Combined Input Leakage on RNR and THERM 200 nA
Thermistor Trip (COLD/OR) R
WEAK
= 475k ±1% ● 80 100 120 kΩ
Thermistor Trip (IDEAL/COLD) R
NR
= 10k ±1% ● 26.4 30 33.6 kΩ
Thermistor Trip (HOT/IDEAL) R
NR
= 10k ±1% ● 2.64 3 3.36 kΩ
Thermistor Trip (UR/HOT) R
UR
= 1k ±1% ● 440 500 560 Ω
DACs
Charging Current Resolution Guaranteed Monotonic Above I
MAX
/16 10 bits
Charging Current Granularity R
ILIMIT
= 0 1 mA
R
ILIMIT
= 10k ±1% 2 mA
R
ILIMIT
= 33k ±1% 4 mA
R
ILIMIT
= Open (or Short to V
DD
)8mA
Wake-Up Charging Current (I
WAKE-UP
) (Note 8) 80 mA
Charging Current Limit (I
MAX
)R
ILIMIT
= 0 1023 mA
R
ILIMIT
= 10k ±1% 2046 mA
R
ILIMIT
= 33k ±1% 4092 mA
R
ILIMIT
= Open (or Short to V
DD
) 8184 mA
I
SET
R
DS(ON)
25 Ω
I
SET
I
OFF
V
ISET
= 2.7V ● 1 µA
Charging Voltage Resolution Guaranteed Monotonic (2.5V ≤ V
BAT
≤ 21V) 10 bits
Charging Voltage Granularity R
VLIMIT
= 0 16 mV
R
VLIMIT
= 10k ±1% 16 mV
R
VLIMIT
= 33k ±1% 32 mV
R
VLIMIT
= 100k ±1% 32 mV
R
VLIMIT
= Open (or Short to V
DD
)32mV
Charging Voltage Limit R
VLIMIT
= 0 ● 8.33 8.432 8.485 V
R
VLIMIT
= 10k ±1% ● 12.50 12.64 12.72 V
R
VLIMIT
= 33k ±1% ● 16.67 16.864 16.97 V
R
VLIMIT
= 100k ±1% ● 20.82 21.056 21.18 V
R
VLIMIT
= Open (or Short to V
DD
) (Note 2) 32.736 V
Logic Levels (Note 12)
SCL/SDA Input Low Voltage (V
IL
) ● 0.6 V
SCL/SDA Input High Voltage (V
IH
) ● 1.4 V
SDA Output Low Voltage (V
OL
)I
PULLUP
= 350µA ● 0.4 V
SCL/SDA Input Current (I
IL
)V
SDA
, V
SCL
= V
IL
● 1 µA
SCL/SDA Input Current (I
IH
)V
SDA
, V
SCL
= V
IH
● 1 µA
INTB Output Low Voltage (V
OL
)I
PULLUP
= 500µA ● 0.4 V
INTB Output Pull-Up Current V
INTB
= V
OL
● 3.5 10 17.5 µA
CHGEN Output Low Voltage (V
OL
)I
OL
= 200µA ● 0.4 V
CHGEN Output High Voltage (V
OH
)I
OH
= –200µA ● V
DD
– 0.4 V
SDB Shutdown Threshold ● 12V
SDB Pin Current 0V ≤ V
SDB
≤ 3V 8 µA
Power-On Reset Duration V
DD
Ramp from 0V to > 3V in < 5µs 100 µs
The ● denotes specifications which apply over the full operating temperature range (T
J
= 0°C to 100°C), otherwise specifications are
T
A
= 25°C. V
CC
= DCIN = 18V, V
BAT1, 2
= 12.6V, V
DD
= 3.3V unless otherwise specified.