LTC4091IDJC#PBF

LTC4091 is a 36V Li-Ion battery charger and power backup manager. The integrated step-down switching regulator charges a battery from a primary power source while providing power to the load. If primary power is lost, the load is seamlessly transitioned to the backup Li-ion/ polymer battery. To protect sensitive downstream loads, the maximum output voltage is 4.45V. It provides an adaptive output that tracks the battery voltage for high efficiency charging. The charge current is programmable and an end-of-charge status output indicates full charge. Also featured is a termination timer and an NTC thermistor input used to monitor battery temperature while charging. During backup, an internal 75Mohm ideal diode connects the battery to the load. It is used in applications such as fleet and asset tracking, automotive GPS data loggers, automotive telematics systems, battery backup systems etc.

• Seamless transition between primary power source and Li-Ion battery
• 2A high voltage step-down regulator with adaptive output control
• Wide input voltage range is 6V to 36V
• Switching frequency is 2.4MHz typ at (RT = 8.66K)
• Full featured Li-Ion battery charger
• Pin selectable 4.1V and 4.2V charge voltage options
• Switch current limit is 3.8A typical at (TA = 25°C, VIN = RUN/SS = 12V)
• Switch VCESAT is 300mV typical at (TA = 25°C, VIN = RUN/SS = 12V)
• Operating temperature is -40°C to 125°C
• Package style is 22-lead plastic DFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party