Maxim recently introduced the MAX14525 battery switch with four enable inputs. Optimised for disconnecting a lithium-ion battery from its load, this device features a low, 35 m RON and an ultra-low, 0,8 μA quiescent supply current. It integrates all necessary components (a comparator, logic, MOSFET, etc) and eliminates up to eight additional components with its four unique control inputs. Packaged in a tiny 2 x 2 mm 8-pin TDFN, the device is suitable for use in portable applications.
This switch is enabled from four possible inputs: a travel adapter input capable of high voltages up to 28 V; an on-key input with a 3 V ±2% trigger threshold; a switch-enable input that is internally ANDed with the switched battery connection; and a factory-mode enable input. The MAX14525 is fully specified over the -40°C to +85°C extended temperature range.
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