Linear Tech Releases Switch Mode USB Power Manager

Linear Technology Corporation has announced its LTC3567, the family of compact, multi-function power management solutions for Li-Ion/Polymer battery applications. The LTC3567 integrates a switching PowerPath manager, a stand-alone battery charger, a 1A high efficiency synchronous buck-boost regulator, an ideal diode and controller, I2C control, plus an always-on LDO, all in a compact, low-profile 4mm x 4mm QFN package. The LTC3567’s PowerPath control feature manages power flow between multiple input sources such as a wall adapter or USB port and the Lithium battery while preferentially providing power to the system load.



The LTC3567 features USB-compatible programmable current limiting to 100mA/500mA/1A, while its Bat-Track adaptive output control enables high efficiency battery charging and reduces power dissipation. Stand-alone autonomous operation simplifies design, eliminating the need for an external microprocessor for battery charge termination. To preserve battery energy, the LTC3567 draws only 38uA in suspend mode. The charger is compatible with inputs up to 5.5V (7V absolute maximum transient for added robustness). The LTC3567 is available from stock in a compact, low-profile (0.75mm) 4mm x 4mm QFN-24 package. Pricing starts at $3.85 each for 1,000-piece quantities.