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LTC3586 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3586 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 36 page  LTC3586/LTC3586-1 3586fb Typical applicaTion FeaTures applicaTions DescripTion High Efficiency USB Power Manager with Boost, Buck-Boost and Dual Bucks The LTC®3586/LTC3586-1 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They include a high efficiency cur- rent limited switching PowerPath manager with automatic load prioritization, battery charger, ideal diode, and four synchronous switching regulators (two bucks, one buck- boost and one boost). Designed specifically for USB applications, the LTC3586/LTC3586-1’s switching power manager automatically limits input current to a maximum of either 100mA or 500mA for USB applications or 1A for adapter-powered applications. Unlike linear chargers, the LTC3586/LTC3586-1 switching architecturetransmitsnearlyallofthepoweravailablefrom the USB port to the load with minimal loss and heat which eases thermal constraints in small places. The two buck regulators can provide up to 400mA each, the buck-boost can deliver 1A, and the boost delivers at least 800mA. The LTC3586/LTC3586-1 are available in a low profile (0.75mm) 38-pin 4mm × 6mm QFN package. High Efficiency PowerPath Manager, Dual Buck, Buck-Boost and Boost Power Manager n High Efficiency Switching PowerPathTM Controller with Bat-TrackTM Adaptive Output Control and “Instant-On” Operation n Programmable USB or Wall Current Limit (100mA/500mA/1A) n Full Featured Li-Ion/Polymer Battery Charger with Float Voltage of 4.1V (LTC3586-1) or 4.2V (LTC3586) with 1.5A Maximum Charge Current n Internal 180mΩ Ideal Diode Plus External Ideal Diode Controller Powers Load in Battery Mode n <30µA No-Load Quiescent Current when Powered from BAT n Dual High Efficiency Buck DC/DCs (400mA IOUT) n High Efficiency Buck-Boost DC/DC (1A IOUT) n High Efficiency Boost DC/DC (800mA IOUT) n Compact (4mm × 6mm × 0.75mm) 38-Pin QFN Package n Digital Still Cameras n HDD-Based MP3 Players, PDAs, GPS, PMPs n Other USB-Based Handheld Products Li-Ion FAULT 0.8V TO 3.6V/400mA 5V/800mA 3.3V/20mA 2.5V to 3.3V/1A 0.8V TO 3.6V/400mA OPTIONAL 0V T TO OTHER LOADS + LTC3586/LTC3586-1 DUAL HIGH EFFICIENCY BUCKS HIGH EFFICIENCY BUCK-BOOST HIGH EFFICIENCY BOOST ALWAYS ON LDO MEMORY/ CORE µP RTC/LOW POWER LOGIC I/O SYSTEM 3586 TA01 USB/WALL 4.5V TO 5.5V CHARGE ILIM USB COMPLIANT STEP-DOWN REGULATOR CC/CV BATTERY CHARGER MODE EN 2 4 1 2 AUDIO/ MOTOR 4 3 CURRENT CONTROL BATTERY VOLTAGE (V) 2.8 0 200 3.2 3.6 3.8 100 700 400 500 600 300 3 3.4 4 4.2 3586 TA01b BATTERY CHARGE CURRENT 500mA USB CURRENT LIMIT EXTRA CURRENT FOR FASTER CHARGING VBUS = 5V 5x MODE BATTERY CHARGER PROGRAMMED FOR 1A Battery Charge Current vs Battery Voltage (LTC3586) , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6522118, 6404251. |
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