Specification	LTC1731ES8-4.2#PBF

Battery Chemistry	Multi-Chemistry
Battery Pack Voltage	4.2 V
Charge Current - Max [Max]	500 mA
Current - Charging	Constant - Programmable
Mounting Type	Surface Mount
Number of Cells	1
Operating Temperature [Max]	85 C
Operating Temperature [Min]	-40 ¯C
Package / Case	0.154 in
Package / Case	8-SOIC
Package / Case	3.9 mm
Programmable Features	Timer
Supplier Device Package	8-SO
Voltage - Supply (Max) [Max]	12 V

LTC1731-4.X Series

Part	Supplier Device Package	Battery Chemistry	Voltage - Supply (Max) [Max]	Package / Case	Package / Case	Package / Case	Programmable Features	Number of Cells	Mounting Type	Charge Current - Max [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Battery Pack Voltage	Current - Charging	Package / Case
Analog Devices Inc./Maxim Integrated LTC1731ES8-4.2#TRPBF	8-SO	Multi-Chemistry	12 V	0.154 in	8-SOIC	3.9 mm	Timer	1	Surface Mount	500 mA	85 C	-40 ¯C	4.2 V	Constant - Programmable
Analog Devices Inc./Maxim Integrated LTC1731EMS8-4.1#TRPBF	8-MSOP	Multi-Chemistry	12 V		8-MSOP 8-TSSOP		Timer	1	Surface Mount	500 mA	85 C	-40 ¯C	4.1 V	Constant - Programmable	0.118 in 3 mm Width
Analog Devices Inc./Maxim Integrated LTC1731ES8-4.2#PBF	8-SO	Multi-Chemistry	12 V	0.154 in	8-SOIC	3.9 mm	Timer	1	Surface Mount	500 mA	85 C	-40 ¯C	4.2 V	Constant - Programmable
Analog Devices Inc./Maxim Integrated LTC1731ES8-4.1#TRPBF	8-SO	Multi-Chemistry	12 V	0.154 in	8-SOIC	3.9 mm	Timer	1	Surface Mount	500 mA	85 C	-40 ¯C	4.1 V	Constant - Programmable
Analog Devices Inc./Maxim Integrated LTC1731EMS8-4.2#PBF	8-MSOP	Multi-Chemistry	12 V		8-MSOP 8-TSSOP		Timer	1	Surface Mount	500 mA	85 C	-40 ¯C	4.2 V	Constant - Programmable	0.118 in 3 mm Width
Analog Devices Inc./Maxim Integrated LTC1731EMS8-4.1#PBF	8-MSOP	Multi-Chemistry	12 V		8-MSOP 8-TSSOP		Timer	1	Surface Mount	500 mA	85 C	-40 ¯C	4.1 V	Constant - Programmable	0.118 in 3 mm Width
Analog Devices Inc./Maxim Integrated LTC1731ES8-4.1#PBF	8-SO	Multi-Chemistry	12 V	0.154 in	8-SOIC	3.9 mm	Timer	1	Surface Mount	500 mA	85 C	-40 ¯C	4.1 V	Constant - Programmable
Analog Devices Inc./Maxim Integrated LTC1731EMS8-4.2#TRPBF	8-MSOP	Multi-Chemistry	12 V		8-MSOP 8-TSSOP		Timer	1	Surface Mount	500 mA	85 C	-40 ¯C	4.2 V	Constant - Programmable	0.118 in 3 mm Width

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 6.36	1m+

Description

General part information

LTC1731-4.X Series

The LTC1731 is a complete constant-current/constant-voltage linear charger controller for single cell lithium-ion batteries. Nickel-cadmium (NiCd) and nickel-metal-hydride (NiMH) batteries can also be charged with constant current using external termination. The external sense resistor sets the charge current with 5% accuracy. An internal resistor divider and precision reference set the final float potential with ±1% accuracy. The output float voltage is set internally to 4.1V (LTC1731-4.1) or 4.2V (LTC1731-4.2).When the input supply is removed,the LTC1731 automatically enters a low current sleep mode, dropping the battery drain current to typically 7µA. An internal comparator detects the end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until cell voltage exceeds 2.457V.The LTC1731 is available in the 8-pin MSOP and SO packages.Float VoltageLTC1731-4.14.1VLTC1731-4.24.2VLTC1731-8.28.2VLTC1731-8.48.4VApplicationsCellular PhonesHandheld ComputersCharging Docks and CradlesProgrammable Current Source

Documents

Technical documentation and resources

LTC1731ES8-4.2#PBF | Datasheet

Datasheet

R384 Reliability Data

Reliability Data