USB Power Manager With Li-Ion Charger And Three Step-Down Regulators

The LTC3557 LTC3557-1 is a highly integrated power management and Battery Charger IC for single cell Li-Ion/ Polymer battery applications. It includes a PowerPathTM manager with Automatic load prioritization, a battery charger, an ideal Diode and numerous internal protection features. Designed speci cally for USB applications, the LTC3557 LTC3557-1 power manager automatically limits input current to a maximum of either 100mA or 500mA for USB applications or 1A for wall adapter powered applications. Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit. The LTC3557 LTC3557-1 also includes three adjustable synchronous Step-down Switching Regulators and a high voltage buck Regulator output controller with Bat-Track that allows ef cient charging from supplies as high as 38V. The LTC3557 LTC3557-1 is available in a low pro le 4mm 4mm 0.75mm 28-pin QFN package. By Linear Technology Corporation
LTC3557 's PackagesLTC3557 's pdf datasheet
LTC3557-1




LTC3557 Pinout, Pinouts
LTC3557 pinout,Pin out
This is one package pinout of LTC3557,If you need more pinouts please download LTC3557's pdf datasheet.

LTC3557 Application circuits
LTC3557 circuits
This is one application circuit of LTC3557,If you need more circuits,please download LTC3557's pdf datasheet.


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