Ling Stuart of the company (Linear) introduced LTC3586, the device is suitable for a lithium-ion / polymer battery application of multi-functional, compact power management solution for the latest in the series and the highest degree of integration of PMIC. LTC3586 integrates a switching power supply channels (PowerPath) Manager, an independent battery charger, and always maintain access LDO and four high-efficiency synchronous switching regulators (a buck - boost, a step-up and two down Pressure regulator), all of which are part of a compact, flat 4 mm x 6mm QFN package. LTC3586 power seamless access control management, such as AC adapter or USB port, and other input sources and lithium-ion battery power between the access road, while giving priority to the power supply system load. In addition, his "immediate access" to work even when the battery also ensure that the electricity supply system load. Fast charge on the case, LTC3586 switching input stage almost from the USB port access to all of the 2.5 W power into the charge current, with a limit of 500 mA USB Power to provide up to 700 mA of current or electricity in exchange to provide up to 1.5 A current. An internal 180 m Ω ideal diode coupled with the optional external ideal diode controller provides a low-loss power path, further minimizing heat generation and maximizing efficiency.

LTC3586 buck - step-up regulator can provide up to 1 A for the current and very suitable for the entire lithium-ion battery voltage range of efficient regulation of a 3.3 V output, up to 2.75 V. LTC3586 buck regulator of the two apparatus 100 percent duty cycle work, and each can be as low as 0.8 V to the output voltage adjustable to provide 400 mA output current. Boost Regulators can provide at least 800 mA output current, and programmable to up to 5 V output. LTC3586's internal low RDS (ON) switches to achieve as high as 94 percent of the switch buck and buck - boost efficiency, the maximum extended battery life. In addition, burst mode (Burst Mode) work on the buck - in terms of step-up regulator to only 25 uA and in respect of each buck regulator in terms of only 35 uA quiescent current (downtime at all stable Pressure for each are <1 uA) optimize light load efficiency. The high 2.25MHz switching frequency allows the use of less than 1 mm in height and slim low-cost capacitors and inductors. In addition, all the regulator can be used in ceramic output capacitor stability, thus achieving very low output voltage ripple.


LTC3586 is limited to 100 mA/500mA/1A of USB-compatible programmable input current, while its battery tracking (Bat-Track) adaptive output control to achieve the minimum power loss efficient batteries. In order to save battery energy, LTC3586 in suspended mode only draw 44 uA current. The charger and up to 5.5 V (absolute maximum transient value of 7 V to increase the robustness of) the input compatible.


A compact, flat (0.75 mm) 4mm x 6mm QFN-38 package LTC3586 is available from stock. In 1000 as a unit quantities, each priced at 5.30 U.S. dollars.


Performance Summary: LTC3586



Full-PMIC: switch power management, lithium-ion / polymer battery charger, the buck - step-up regulator, two buck regulator, the step-up regulators and LDO

Thermally enhanced, flat (0.75 mm) 38-lead 4 mm x 6mm QFN package

Power management and battery charger



A battery tracking adaptive output control of the high efficiency switching power supply channel controller

AC adapter from the maximum charge current programmable to up to 1.5 A

By an independent USB port of up to 700 mA charge current

DC / DC converters



High-efficiency buck - Boost Regulators: 1 A IOUT

High-efficiency step-up regulator: 800 mA IOUT

Two high efficiency of 2.25 MHz synchronous buck regulator: 400 mA/400mA IOUT

2.25MHz frequency allows the use of small external components

Burst mode of low IQ: buck - Boost Regulators for 25 uA; every buck regulator for the 35 uA

Always maintain access 3.3V/25mA LDO