LTC3554 - Micropower USB Power Manager With Li-Ion Charger and Two Step-Down Regulators

LTC3554 - Micropower USB Power Manager With Li-Ion Charger and Two Step-Down Regulators

Features

¡¤                     10¦ÌA Standby Mode Quiescent Current
(All Outputs On)

¡¤                     Seamless Transition Between Input Power Sources: Li-Ion/Polymer Battery and USB

¡¤                     240m¦¸ Internal Ideal Diode Provides Low Loss PowerPath™

¡¤                     Dual High Efficiency Step-Down Switching Regulators (200mA I_OUT) with Adjustable Output Voltages

¡¤                     Pushbutton On/Off Control with System Reset

¡¤                     Full Featured Li-Ion/Polymer Battery Charger

¡¤                     Programmable Charge Current with Thermal Limiting

¡¤                     Instant-On Operation with Discharged Battery

¡¤                     Compact Ultrathin 3mm ¡Á 3mm ¡Á 0.55mm 20-Pin UTQFN Package

Typical Application

Description

The LTC3554 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 LTC3554 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 LTC3554 also includes two synchronous step-down switching regulators as well as a pushbutton controller. With all supplies enabled in standby mode, the quiescent current drawn from the battery is only 10¦ÌA. The LTC3554 is available in a 3mm ¡Á 3mm ¡Á 0.55mm 20-pin UTQFN package.

Packaging

QFN-20

 FROM: Company Name: Aunytor Electronic (HK) Co.,Ltd
            Contact Person: liao
            Skype: Aunytor
            Email: 2885745253@qq.com