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Switch Mode USB Power Manager, Buck-Boost, Boost & Dual Buck Regulator PMIC Maximizes Battery Runtime in Compact 24mm2 Footprin

Jakub Fexa, 6. September 2008 - 13:19
Linear Technology Corporation announces the LTC3586, the latest and most highly 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.

The LTC3586’s buck-boost regulator can deliver up to 1A continuously and is ideal for efficiently regulating a 3.3V output over the full Lithium battery voltage range, down to 2.75V. The LTC3586’s two buck regulators feature 100% duty cycle operation and are capable of delivering output currents of 400mA each, with adjustable output voltages down to 0.8V.

The LTC3586’s internal low RDS(ON) switches enable switching buck and buck-boost efficiencies as high as 94%, maximizing battery run time.

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).

 

 Multi-Function PMIC: Switching Power Manager + Battery Charger + Buck-Boost + Boost + Dual Sync Buck + LDO

Summary of Features: LTC3586
Complete Multi-Function PMIC: Switching Power Manager,
Li-Ion/Polymer Battery Charger, Buck-Boost Regulator,
Dual Buck Regulators, Boost Regulator & LDO
Thermally Enhanced, Low Profile (0.75mm) 38-Lead
4mm x 6mm QFN Package
Power Manager & Battery Charger
High Efficiency Switching PowerPath Controller with
Bat-Track Adaptive Output Control
Maximum Charge Current Programmable up to 1.5A from
Wall Adapter
Up to 700mA Charge Current from a Standard USB Port
DC/DC Converters
High Efficiency Buck-Boost Regulator: 1A IOUT
High Efficiency Boost Regulator: 800mA IOUT
Two High Efficiency 2.25MHz Synchronous Buck
Regulators: 400mA/400mA IOUT
2.25MHz Operating Frequency Enables Small External
Components
Burst Mode Operation for Low IQ: 25uA for Buck-Boost,
35uA per Buck Regulator
Always-On 3.3V/25mA LDO

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