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LTC4062 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4062 Datasheet(HTML) 3 Page - Linear Technology |
3 / 20 page LTC4062 3 4062f ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted. Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: The LTC4062 is 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. Note 3: Failure to correctly solder the exposed pad of the package to the PC board will result in a thermal resistance much higher than 40°C/W. Note 4: Supply current includes PROG pin current and IDET pin current (approximately 100µA each) but does not include any current delivered to the battery through the BAT pin (approximately 100mA). Note 5: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Overtemperature protection will become active at a junction temperature greater than the maximum operating temperature. Continuous operation above the specified maximum operating junction temperature may impair device reliability. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IDETECT Charge Current Detection Threshold RDET = 1k, 0 ≤ TA ≤ 85°C 90 100 110 mA RDET = 2k, 0 ≤ TA ≤ 85°C45 50 55 mA RDET = 10k, 0 ≤ TA ≤ 85°C 8 10 12 mA RDET = 20k, 0 ≤ TA ≤ 85°C 3.8 5 6.2 mA ∆VRECHRG Recharge Threshold Voltage VFLOAT – VRECHRG, 0 ≤ TA ≤ 85°C 65 100 135 mV tSS Soft-Start Time IBAT from 0 to ICHG 100 µs tTERM Termination Comparator Filter Time Current Termination Mode 0.8 1.5 2.5 ms tRECHRG Recharge Comparator Filter Time 3 7 14 ms tTIMER Charge Cycle Time CTIMER = 0.1µF 2.55 3 3.45 hr RC/5 C/5 Pin Pull-Down Resistor ● 2 3.4 5 MΩ VC/5 C/5 Input Threshold Voltage C/5 Rising, 4.3V < VCC < 8V 0.4 0.7 1 V Hysteresis 70 mV TLIM Junction Temperature in Constant 105 °C Temperature Mode RON Power FET “ON” Resistance VBAT = 3.85V, ICC = 175mA, RPROG = 2k 375 mΩ (Between VCC and BAT) Comparator VIN+ IN+ Pin Threshold Voltage VIN+ Falling ● 0.988 1 1.012 V Hysteresis 50 mV VBAT-MIN Minimum VBAT Supply Voltage for the VCC = 0V, VBAT Falling 2.4 2.5 2.6 V Low Power Comparator Hysteresis 100 mV IBAT Supply Current for the Low Power VCC = 0V, VBAT = 2.5V 7 9 13 µA Comparator |
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