features ? li-ion or li-polymer battery charger controller dc to dc 1.9v/2.5v (vcore) ldo 2.7v/2.8v (avcc) ldo 2.8v (v-pad) ldo 2.8v (v-vib) ldo 2.47v/2.66v (bat-rtc) - backup battery supply ldo 1.72v/2.66v (vcc-rtc) - rtc supply power management startup controller and reset generation 1. description the at73c214 is designed to supply digital, analog, interface, rf and backup sec- tions of generic wireless devices and in particular battery powered applications. it can be used to supply a cpu with a high effici ency dc-to-dc converter, radio frequency transceivers with high psrr and noise performance ldos, memories and analog sections with independent ldo channels. in addition the at73c214 integrates ldos to recharge backup elements and convert voltage to microcontroller rtc supply. the at73c214 also includes a low-cost battery charger, using a simple external pnp transistor for li-ion or li-polymer batteries. the battery-safe operating conditions are fully under hardware control during the start up procedure (i.e., when the device is turned on or a charger is plugged in). the battery precharge is integrated and self operated by the at73c214. then the fast-charge phase and end-of-charge procedure are transferred to the external microcontroller software. ldo and dc-to-dc output voltage can be programmed by mask change. power management for mobiles (pm) at73c214 power management and battery charger for wireless devices summary 6232as?pmaac?24-may-06
2 6232as?pmaac?24-may-06 at73c214 summary 2. block diagram figure 2-1. functional block diagram reset generator 35 ms vpad vbat vbat reset-b dgnd vin en fb gnd core dc/dc gnd vcore 1.9/2.5v/300 ma vcore gnd1 vin en vout gnd vin en vout gnd analog ldo avcc agnd vin en gnd pad ldo vback vbat on/off up-on/off vin-reg1 vin-reg2 agnd rtc supply block vpad gnd vbat 2.8v/80 ma en-analog-b deep discharged 2.6v vin en vout gnd vib-out vvib gnd gnd lx 2.8v/130 ma eco -mode lx avcc 2.7/2.8v/130 ma bb1 2.8v lp dcdc battery charger controller chg flash_led gnd lp vibrator ldo dgnd bb1 agnd1 gnd gnd en-analog-b vbat pmc ls spi por 10 khz osc over-temp en up-on/off on/off eco-mode gnd en state machine reset reset 5 ma 0.5 ma - vcc-rtc bat-rtc gnd gnd 2.7v bb1 gnd gnd gnd gnd vref cref agnd v-pad vbat cref reset-b en en_vcore bb1 gnd gnd test en_vpad vbat > 3.2v en gnd ldo1 ldo2 ldo3 ldo4 ldo5 dc-on dc-on v-pad digital digital over voltage under voltage gnd battery charger li-ion battery led-out gnd to adc fo digital mcu for battery monitoring i max = 0.8a en_vcore en-vib v-vib en_vcore state machine chg_in gate-chg vbat batmon 1m ? 1% 1m ? 1% 2.47v/2.66v bat-rtc vcc-rtc 1.72v/2.7v
3 6232as?pmaac?24-may-06 at73c214 summary 3. ordering information ordering code package package type tempeature opeating range AT73C214J tfbga 49 green -40c to +85c
4 6232as?pmaac?24-may-06 at73c214 summary revision history doc. rev date comments change request ref. 6232as 03-may-06 24-may-06 first issue qualified
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