LTC3553EUD#PBF

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, this device 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. It 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 12μA. It is used in application such as USB-based handheld products, portable Li-ion/polymer based electronic devices, wearable electronics, low power medical devices etc.

• 240Mohm internal ideal diode provides low loss PowerPath™
• High efficiency 200mA buck regulator
• 150mA low dropout (LDO) linear regulator
• Pushbutton on/off control with system reset
• Programmable charge current with thermal limiting
• Instant-on operation with discharged battery
• Oscillator frequency is 1.125MHz typical at (TA = 25°C)
• Operating temperature is -40°C to 85°C
• Package style is 20-lead plastic QFN

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