Datasheet LTC1980 (Analog Devices) - 8

LTC1980
W BLOCK DIAGRA
V LDOFB LDODRV BIAS1 CAOUT 13 5 6 22 REF_UVL 21 V ISENSE REF REFERENCE + GM – + + – VBAT 18 I = O VMAX VREF – COMP VREF + UVL V V DD REG – – REG 7 VREF + + VREF V 19 BIAS2 – SR_EN DIS L V DUMP REF VM MODE 16 MODE H XFMR H = BURST MODE OPERATION OFF S 11 RGTDR OPEN = BURST MODE OPERATION ON OSC Q RAMP L = DISABLE + R 14 BGTDR V 4 VREG C PWM AC VBAT COMP 12 PGND – PROGT 2 VREF + VREF – AC REGFB 3 SLEEP EA + WAKE – BATT1 9 BURST VREF + OVP 23 CONDITION BATTERY – BATT2 10 VREF + RECHARGE START TIMEOUT TIMER – SHORT CYCLE 17 TIMER VREF + WA 8 – 5µA 1 PROG REG 15 VREF + GM – GND 20 REG 24 1980 BD SS 1980f 8