Description

The LTC3553 is a micropower, highly integrated power management and battery charger IC for single-cell Li-Ion/Polymer battery applications. It includes a PowerPath manager with automatic load prioritization, a battery charger, an ideal diode and numerous internal protection features. Designed specifically for USB applications, the LTC3553 power manager automatically limits input current to a maximum of either 100mA or 500mA. Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the selected input current limit. The LTC3553 also includes a synchronous buck regulator, a low dropout linear regulator (LDO), and a pushbutton controller. With all supplies enabled in standby mode, the quiescent current drawn from the battery is only 12?A. The LTC3553 is available in a 3mm ? 3mm ? 0.75mm 20-pin QFN package. Option LDO PGOOD Hard Reset Time LTC3553 ON/OFF Control No 5 Seconds LTC3553-2 Always On Yes 14 Seconds Applications USB-Based Handheld Products Portable Li-Ion/Polymer Based Electronic Devices Wearable Electronics Low Power Medical Devices

Type:

Part number: DC1550A

More details from Analog Devices Inc.