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LTC1731ES8-8.2 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1731ES8-8.2 Datasheet(HTML) 3 Page - Linear Technology |
3 / 12 page 3 LTC1731-8.2/LTC1731-8.4 sn1731 17318fs Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VASD Automatic Shutdown Threshold Voltage (VCC – VBAT) Falling 30 54 90 mV (VCC – VBAT) Rising 40 69 100 mV VDIS Voltage Mode Disable Threshold Voltage VDIS = (VCC – VTIMER) q 0.4 V IPROG PROG Pin Current Internal Pull-Up Current, No RPROG 2.5 µA PROG Pin Load Regulation PROG Pin Source Current, ∆VPROG ≤ 5mV q 300 µA VPROG PROG Pin Voltage RPROG =19.6k 2.457 V ICHRG CHRG Pin Weak Pull-Down Current VCHRG = 1V 50 100 150 µA VCHRG CHRG Pin Output Low Voltage ICHRG = 5mA 0.6 1.2 V IC/10 End of Charge Indication Current Level RPROG = 19.6k, RSENSE = 0.2Ω q 25 50 100 mA tTIMER TIMER Accuracy CTIMER = 0.01µF10 % VCLAMP DRV Pin Clamp Voltage VCLAMP = VCC – VDRV, IDRIVE = 50µA 6.5 V ELECTRICAL CHARACTERISTICS Note 2: The LTC1731E-8.2/LTC1731E-8.4 are guaranteed to meet performance specifications from 0 °C to 70°C. Specifications over the –40 °C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Consult factory for I grade parts. The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 9V unless otherwise noted. TYPICAL PERFOR A CE CHARACTERISTICS VCC (V) 9 10 11 12 1731 G01 60 55 50 45 40 RPROG = 19.6K RSENSE = 0.2Ω VBAT = 4V TA = 25° Trickle Charge Current vs VCC 60 55 50 45 40 TEMPERATURE ( °C) –50 100 1731 G06 050 –25 25 75 125 RPROG = 19.6K RSENSE = 0.2Ω VBAT = 4V VCC = 9V VCC (V) 9 10 11 12 1731 G08 4.96 4.95 4.94 4.93 4.92 4.91 4.90 4.89 4.88 RPROG = 19.6K TA = 25° Trickle Charge Current vs Temperature Trickle Charge Threshold Voltage vs VCC |
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