Datasheet

LTC1730-4/LTC1730-4.2
3
sn1730 1730fs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1730-4/LTC1730-4.2 are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
CHRG
CHRG Pin Pull-Down Current V
CHRG
= 1V, C/10 Mode 10 40 70 µA
T
TIMER
TIMER Accuracy C
TIMER
= 0.1µF10%
V
GATE
GATE Pin Voltage V
BAT
= 3V 7.5 V
V
BAT
= 4V 10 V
T
SHDN
Thermal Shutdown Temperature 140 °C
∆T
SHDN
Thermal Shutdown Hysteresis 5 °C
∆V
RECHRG
Recharge Battery Voltage Offset from V
BAT(Full Charged)
– V
RECHRG
(Note 3) 150 mV
Full Charged Battery Voltage
V
NTC_HOT
NTC/SHDN Pin Threshold Voltage (Hot) High to Low; V
CC
= 4V ● 1.95 2 2.05 V
Hysteresis 50 mV
V
NTC_COLD
NTC/SHDN Pin Threshold Voltage (Cold) Low to High; V
CC
= 4V ● 3.4 3.5 3.6 V
Hysteresis 45 mV
V
SEL
SEL Pin Threshold LTC173ECGN-4 0.7 V
V
ACPR
ACPR Pin Output Low Voltage LTC1730EGN-4, I
ACPR
= 5mA 0.6 V
V
FAULT
FAULT Pin Output Low Voltage LTC1730EGN-4, I
FAULT
= 3mA 1.2 V
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 5mA, Charging Mode 0.9 V
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 6V unless otherwise noted.
DC ELECTRICAL CHARACTERISTICS
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: For the LTC1730-4 version, the full charged V
BAT
value is
typically 4.1V.