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LTC1734L Datasheet(PDF) 3 Page - Linear Technology |
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LTC1734L Datasheet(HTML) 3 Page - Linear Technology |
3 / 12 page 3 LTC1734L 1734lf The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, GND = 0V and VBAT is equal to the float voltage unless otherwise noted. All current into a pin is positive and current out of a pin is negative. All voltages are referenced to GND, unless otherwise specified. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Charger Manual Control VMSDT Manual Shutdown Threshold VPROG Increasing q 2.05 2.15 2.25 V VMSHYS Manual Shutdown Hysteresis VPROG Decreasing from VMSDT 90 mV IPROGPU Program Pin Pull-Up Current VPROG = 2.5V – 6 – 3 – 1.5 µA Protection IDSHRT Drive Output Short-Circuit Current Limit VDRIVE = VCC q 35 65 130 mA Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC1734LE is guaranteed to meet performance specifications from 0 °C to 70°C ambient temperature range and 0°C to 100°C junction temperature range. Specifications over the – 40 °C to 85°C operating ambient temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: Assumes that the external PNP pass transistor has negligible B-C reverse-leakage current when the collector is biased at 4.2V (VBAT) and the base is biased at 5V (VCC). Note 4: Assumes that the external PNP pass transistor has negligible B-E reverse-leakage current when the emitter is biased at 0V (VCC) and the base is biased at 4.2V (VBAT). Note 5: The 4.68V maximum undervoltage lockout (UVLO) exit threshold must first be exceeded before the minimum VCC specification applies. Short duration drops below the minimum VCC specification of several microseconds or less are ignored by the UVLO. If manual shutdown is entered, then VCC must be higher than the 4.68V maximum UVLO threshold before manual shutdown can be exited. When operating near the minimum VCC, a suitable PNP transistor with a low saturation voltage must be used. TYPICAL PERFOR A CE CHARACTERISTICS Float Voltage vs Temperature and Supply Voltage TEMPERATURE ( °C) –50 4.19 4.20 4.21 0 50 75 1734 G01 –25 25 100 125 IBAT = 10mA PNP = FCX589 VCC = 8V VCC = 4.55V IBAT (mA) 0 4.199 4.200 4.201 50 100 125 1734 G02 25 75 150 175 VCC = 5V TA = 25°C PNP = FCX589 RPROG = 2100Ω TEMPERATURE ( °C) –50 48 49 50 51 52 0 50 75 1734 G03 –25 25 100 125 RPROG = 7.5k PNP = FCX589 VCC = 4.55V AND 8V Float Voltage vs IBAT IBAT1 vs Temperature and Supply Voltage |
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