Linear Tech Launches Integrated PMIC

Linear Technology Corporation has announced its LTC3586, an integrated PMIC in a family of multi-function, compact power management solutions for Li-Ion/Polymer battery applications. The LTC3586 integrates a switching PowerPath manager, a stand-alone battery charger, always-on LDO, and 4 high efficiency synchronous switching regulators: 1 buck-boost, 1 boost, and 2 buck regulators, all in a compact, low-profile 4mm x 6mm QFN package. The LTC3586’s PowerPath control seamlessly 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. In addition, its "instant-ON" operation ensures system load power even with a dead battery. The LTC3586’s switching input stage converts nearly all of the 2.5W available from the USB port to charging current, enabling up to 700mA from a 500mA limited USB supply or up to 1.5A when wall powered. An internal 180milliohm diode plus optional external ideal diode controller provide a low loss power path, further minimizing heat generation and maximizing efficiency.



The LTC3586 features USB-compatible programmable input current limiting to 100mA/500mA/1A, while its Bat-Track adaptive output control enables high efficiency battery charging with minimum power dissipation. To preserve battery energy, the LTC3586 draws only 44uA in suspend mode. The charger is compatible with inputs up to 5.5V (7V absolute maximum transient for added robustness). The LTC3586 is available from stock in a compact, low-profile (0.75mm) 4mm x 6mm QFN-38 package. Pricing starts at $5.30 each for 1,000-piece quantities.