MAX17085GTL+;中文规格书,Datasheet资料.pdf

MAX17085GTL+;中文规格书,Datasheet资料.pdf

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MAX17085GTL;中文规格书,Datasheet资料

_______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at . Integrated Charger, Dual Main Step-Down Controllers, and Dual LDO Regulators M A X 1 7 0 8 5 B General Description The MAX17085B is an all-in-one notebook power solution integrating a multichemistry battery charger, dual fixed- output Quick-PWMK step-down controllers, and dual keep-alive linear regulators: Charger: The high-frequency (~1.4MHz) multichem- istry battery charger uses a current-mode, fixed inductor current ripple architecture that significantly reduces component size and cost. Low-offset sense amplifiers allow the use of low-value sense resistors for charging and input current limit. The charger uses n-channel switching MOSFETs. Adjustable charge current, charge voltage, and cell selection allow for flexible use with different battery packs. Charge current is set by an analog control input, or a PWM input. High-accuracy current-sense ampli- fiers provide fast cycle-by-cycle current-mode control to protect against short circuits to the battery and respond quickly to system load transients. Additionally, the char- ger provides a high-accuracy analog output that is pro- portional to the adapter current. An integrated charge pump controls an n-channel adapter selector switch. The charge pump remains active even when the charger is off. When the adapter is absent, a p-channel MOSFET selects the battery. Main SMPS: The dual Quick-PWM step-down con- trollers with synchronous rectification generate the 5V and 3.3V main power in a notebook. Low- side MOSFET sensing provides a simple low-cost, highly efficient valley current-limit protection. The MAX17085B also includes output undervoltage, out- put overvoltage, and thermal-fault protection. Separate enable inputs for each SMPS and a com- bined open-

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