general description the max14690 is a battery-charge-management solution ideal for low-power wearable applications. the device includes a linear battery charger with a smart power selector and several power-optimized peripherals. the max14690 features two ultra-low-power buck regulators with a typical quiescent current of 900na. in addition, three ultra-low power low-dropout (ldo) linear regulators, with a typical quiescent current of 600na are included. in total, the max14690 can provide up to five regulated voltages, each with an ultra-low quiescent current, critical to battery life for the unique power profile in 24/7 operation devices, such as those in the wearable market. the battery charger features a smart power selector that allows operation on a dead battery when connected to a power source. to avoid overloading a power adapter, the input current to the smart power selector is limited based on an i 2 c register setting. if the charger power source is unable to supply the entire system load, the smart power control circuit supplements the system load with current from the battery. the two synchronous, high-efficiency step-down buck regulators feature a fixed-frequency pwm mode for tighter regulation and a burst mode for increased efficiency during light-load operation. the output voltage of these regulators can be programmed through i 2 c with the default preconfigured. the three configurable ldos each have a dedicated input pin. each ldo regulator output voltage can be programmed through i 2 c with the default preconfigured. the linear regulators can also be configured to operate as power switches that may be used to disconnect the quiescent load of the system peripherals. the max14690 features a programmable power controller that allows the device to be configured for applications that require the device be in a true-off, or always-on, state. the controller also provides a delayed reset signal and voltage sequencing. the max14690 is available in a 36-bump, 0.4mm pitch, 2.72mm x 2.47mm wafer-level package (wlp). beneits and features extend system use time between battery charging ? dual ultra-low-i q 200ma buck regulators - output programmable from 0.8v to 1.8v and 1.5v to 3.3v - 0.9a (typ) quiescent current - automatic burst or forced-pwm modes ? three ultra-low-i q 100ma ldos - output programmable from 0.8v to 3.6v - 0.6a (typ) quiescent current - 2.7v to 5.5v input with dedicated pin easy-to-implement li+ battery charging ? smart power selector ? 28v/-5.5v tolerant input ? thermistor monitor minimize solution footprint through high integration ? provides five regulated voltage rails ? switch mode option on each ldo optimize system control ? monitors pushbutton for ultra-low power mode ? power-on reset delay and voltage sequencing ? on-chip voltage monitor multiplexer applications wearable electronics fitness monitors portable medical devices 19-7480; rev 11; 5/16 ordering information appears at end of data sheet. max14690 wearable charge-management solution max 14690 sy s line ar li + batte ry ch ar ger with powe rs el ec tor 28 vi np ut pr otection powe r sequ en ce r bu ck 1 mo nito r bu ck 2 contro l ld o/ sw itch 1 ld o/ sw itch 2 ld o/ sw itch 3 powe r da ta block diagram abridged data sheet downloaded from: http:///
max14690 wearable charge-management solution www.maximintegrated.com maxim integrated 2 typical application circuit li+ battery charger with smart power selector bat thm cap sys chgin set mux/ divider scl sda int mpc0 control gnd max14690 vsys vio l3out l3in mpc1 buck 2 b2lx buck 1 b1out b1lx ldo/ switch 1 l1in l1out l2in 1f 1f 1f 10f 10f 10f 1f 2.2h scl sda int mpc0 mpc1 ldo/ switch 2 ldo/ switch 3 b2out l2out vsys vsys vsys pfn2 pfn1 pfn2 mon 1f 1f 2.2h led ext mon * optional external fet vl3 vl2 vb2 vb1 v l1 vsys rst rst (*) abridged data sheet downloaded from: http:///
+denotes a lead(pb)-free package/rohs-compliant package. t = tape and reel. *future productcontact marketing for availability. see table 35 and table 36 for the device differences. part temp range pin-package max14690aewx+ -40c to +85c 36 wlp max14690aewx+t -40c to +85c 36 wlp max14690bewx+ -40c to +85c 36 wlp max14690bewx+t -40c to +85c 36 wlp max14690cewx+ -40c to +85c 36 wlp max14690cewx+t -40c to +85c 36 wlp max14690dewx+ -40c to +85c 36 wlp max14690dewx+t -40c to +85c 36 wlp max14690eewx+* -40c to +85c 36 wlp max14690eewx+t* -40c to +85c 36 wlp max14690hewx+ -40c to +85c 36 wlp max14690hewx+t -40c to +85c 36 wlp max14690iewx+ -40c to +85c 36 wlp max14690iewx+t -40c to +85c 36 wlp max14690jewx+ -40c to +85c 36 wlp max14690jewx+t -40c to +85c 36 wlp max14690kewx+* -40c to +85c 36 wlp max14690kewx+t* -40c to +85c 36 wlp max14690newx+ -40c to +85c 36 wlp max14690newx+t -40c to +85c 36 wlp package type package code outline no. land pattern no. 36 wlp w362d2+1 21-0897 refer to application note 1891 max14690 wearable charge-management solution www.maximintegrated.com maxim integrated 46 chip information process: bicmos ordering information package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. abridged data sheet downloaded from: http:///
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