19-7685; rev 0; 12/15 general description t he m ax 14720 /m ax 14750 are compac t power-manage me nt s olu t ion s f or s pace- c ons t rained , ba tt ery-powered appli cations where size and eff iciency are cri t ical . both device s in te gr ate a power s wi t ch , a linear regula tor, a buck regula tor, and a buc k -boos t regula tor. the max14720 is designed to be the primary power- managemen t de vice and is ideal f or ei t her non-re c harge able batte ry ( coin -c el l, dual alkaline ) appl ic ation s or for rechargeable solutions where the battery is removable and charged separately. the device includes a button monitor and sequencer. the max14750 works well as a companion to a charger or pmic in rechargeable applications. it provides direct pin control of each function and allows greater flexibility for controlling sequencing. the devices include two programmable micro-i q , high- efficiency switching converters: a buck-boost regulator and a synchronous buck regulator. these regulators feature a burst mode for increased efficiency during light- load operation. the low-dropout linear regulator has a programmable output. it can also operate as a power switch that can disconnect the quiescent load of system peripherals. the devices also include a power switch with battery- monitoring capability. the switch can isolate the battery from all system loads to maximize battery life when not operating. it is also used to isolate the battery-impedance measurements. this switch can operate as a general- purpose load switch as well. t he m ax 14720 includes a programmable power con t rol ler t ha t allow s t he device to be con f igured ei t her f or use in applica t ions t ha t require a t rue off state or f or always-o n applica t ions . t his con t roller provides a delayed rese t signal , v ol t age s equencing , and cus t omized bu tt on t iming f or on /off c on t rol and recovery hard rese t. both devices also include a multiplexer for monitoring the power inputs and outputs of each function. these devices are available in a 25-bump, 0.4mm pitch, 2. 26mm x 2. 14mm wa f er-level package (wlp) and oper ate over the -40c to +85c extended temperature range. extended system battery use time ? micro-i q 250mw buck-boost regulator - input voltage from 1.8v to 5.5v - output voltage programmable from 2.5v to 5v - 1.1a quiescent current - programmable current limit ? micro-i q 200ma buck regulator - input voltage from 1.8v to 5.5v - output voltage programmable from 1.0v to 2.0v - 0.9a quiescent current ? micro-i q 100ma ldo - input voltage from 1.71v to 5.5v - output programmable from 0.9v to 4.0v - 0. 9a quiescent current - extend product shelf-life ? battery seal mode (max14720) - 120na battery current ? power switch on-resistance - 250m (max) at 2.7v - 500m (max) at 1.8v ? battery impedance detector easy-to-implement system control ? (max14720) - push-button monitoring to enable ultra-low power shipping mode - disconnects all loads from battery and reduces leakage to less than 1a - power-on reset (por) delay and voltage sequencing ? individual enable pins (max14750) ? voltage monitor multiplexer ? i 2 c control interface applications wearable medical devices wearable fitness devices portable medical devices ord er ing in fo rmat io n a pp ears at e nd of d ata sh eet . max14720/max14750 power-management solution abridged data sheet downloaded from: http:///
figure 10. lithium coin cell max14720/max14750 power-management solution www.maximintegrated.com maxim integrated 33 max 3262 0 b uc k-boost +3.3v hvin vsys 1f hvout hvilx hvolx b uc k bin 1f blx bout +1.2v 10f 10f 2.2h v dd 12 v dd b ldo lin 1f lout 1f +1.8v v dd 18 vrtc switch +2.0v to +3.6v swout 10 0f vsys swin vbat control kin kout mpc rst gnd v cc vbat mon adc scl scl sda sda 0.1f cap rst mpc key max 1472 0a 4.7h typical application circuits abridged data sheet downloaded from: http:///
figure 13. companion li+ rechargeable max14720/max14750 power-management solution www.maximintegrated.com maxim integrated 36 max 326 20 buck-boost +3.3v hvin vsys 1f hvout hvilx hvolx buck bin 1f blx bout 10f 10f 2.2h v dd18 v ddb ldo lin 1f lout 1f +1.2v v dd12 vrtc swout 1f sw1.8v control swen hven ben len gnd v cc mon adc scl scl sda sda 0.1f cap swen max 147 50 4.7h +2.7v to +5v swin 1f +1.8v switch +1.8v 0.1f vsys vbus vsys 1.8v typical application circuits (continued) abridged data sheet downloaded from: http:///
+denotes a lead(pb)-free/rohs-compliant package. *future productcontact factory for availability. t = tape and reel. max14720/max14750 power-management solution www.maximintegrated.com maxim integrated 37 ordering informationchip information process: bicmos package information f or t he la t es t pac k age ou t line in f orma t ion and land pa tt ern s (f oo t prin ts ), go to ww w. max im in te g rate d. com /p acka ges . no te t ha t a +, # , or - in t he package c ode indica t es roh s st atus onl y. pac kage drawing s may s how a di ff eren t suff ix c harac ter, bu t t he drawing per t ains to t he pac k age regardle ss of roh s stat us . part temp range pin-package max14720 aewa+ -40c to +85c 25 wlp max14720aewa+t -40c to +85c 25 wlp max14720bewa+* -40c to +85c 25 wlp max14720bewa+t* -40c to +85c 25 wlp max14750 aewa+ -40c to +85c 25 wlp max14750aewa+t -40c to +85c 25 wlp max14750bewa+* -40c to +85c 25 wlp max14750bewa+t* -40c to +85c 25 wlp package type package code outline no. land pa ttern no. 25 wlp w252m2+1 21-0788 refer to application note 1891 abridged data sheet downloaded from: http:///
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