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LTC1760 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1760 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 44 page  LTC1760 3 1760f ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDCIN = 20V, VBAT1 = 12V, VBAT2 = 12V, VVDDS = 3.3V, VVCC2 = 5.2V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ITOL Current Accuracy With Respect to Current Reported by Battery 4mV/RSENSE < Requested Current < ILIMIT (Min) (Note 12) RILIMIT = 0 (Short to GND) ● –2 2 mA RILIMIT = 10k ±1% ● –4 4 mA RILIMIT = 33k ±1% ● –8 8 mA RILIMIT = Open (or Short ILIMIT to VCC2) ● –8 8 mA f0SC Regulator Switching Frequency 255 300 345 kHz fDO Regulator Switching Frequency in Low Duty Cycle ≥99% 20 25 kHz Dropout Mode DCMAX Regulator Maximum Duty Cycle 99 99.5 % IMAX Maximum Current Sense Threshold VITH = 2.2V 140 155 190 mV ISNS CA1 Input Bias Current VCSP = VCSN > 5V 150 µA CMSL CA1/I1 Input Common Mode Low 0 V CMSH CA1/I1 Input Common Mode High VDCIN – 0.2 V VCL1 CL1 Turn-On Threshold 95 100 105 mV ● 94 100 108 mV TGATE Transition Time: TG tr TGATE Rise Time CLOAD = 3300pF, 10% to 90% 50 90 ns TG tf TGATE Fall Time CLOAD = 3300pF, 10% to 90% 50 90 ns BGATE Transition Time: BG tr BGATE Rise Time CLOAD = 3300pF, 10% to 90% 50 90 ns BG tf BGATE Fall Time CLOAD = 3300pF, 10% to 90% 40 80 ns Trip Points VTR DCDIV/LOPWR Threshold VDCDIV or VLOPWR Falling ● 1.166 1.19 1.215 V VTHYS DCDIV/LOPWR Hysteresis Voltage VDCDIV or VLOPWR Rising 30 mV IBVT DCDIV/LOPWR Input Bias Current VDCDIV or VLOPWR = 1.19V 20 200 nA VTSC Short-Circuit Comparator Threshold VSCP – VSCN, VCC ≥ 5V ● 90 100 115 mV VFTO Fast Power Path Turn-Off Threshold VDCDIV Rising from VCC 6 7 7.9 V VOVSD Overvoltage Shutdown Threshold as a VSET Rising from 0.8V until TGATE and BGATE 107 % Percent of Programmed Charger Voltage Stop Switching DACs IRES IDAC Resolution Guaranteed Monotonic 10 Bits IDAC Pulse Period: tIP Normal Mode 610 15 µs tILOW Wake-Up Mode 50 ms Charging Current Granularity RILIMIT = (Short ILIMIT to GND) 1 mA RILIMIT = 10k ±1% 2 mA RILIMIT = 33k ±1% 4 mA RILIMIT = Open (or Short ILIMIT to VCC2 )4 mA IWAKE_UP Wake-Up Charging Current (Note 5) 60 80 100 mA ILIMIT Charging Current Limit RILIMIT = 0 (Short ILIMIT to GND) ● 980 1000 1070 mA RILIMIT = 10k ±1% ● 1960 2000 2140 mA RILIMIT = 33k ±1% ● 2490 3000 3210 mA RILIMIT = Open (or Short ILIMIT to VCC2 ) ● 3920 4000 4280 mA VRES VDAC Resolution Guaranteed Monotonic (5V < VBAT < 25V) 11 Bits |
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