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LTC4068EDD-4.2 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4068EDD-4.2 Datasheet(HTML) 3 Page - Linear Technology |
3 / 12 page 3 LTC4068-4.2/LTC4068X-4.2 406842fa Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: The LTC4068E-4.2/LTC4068XE-4.2 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. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS TLIM Junction Temperature in Constant 120 °C Temperature Mode RON Power FET “ON” Resistance 600 mΩ (Between VCC and BAT) tSS Soft-Start Time IBAT = 0 to IBAT =1000V/RPROG 100 µs tRECHARGE Recharge Comparator Filter Time VBAT High to Low 0.75 2 4.5 ms tTERM Termination Comparator Filter Time IBAT Drops Below Charge Termination Threshold 400 1000 2500 µs The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted. ELECTRICAL CHARACTERISTICS Note 3: Failure to solder the exposed backside 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 ITERM pin current (approximately 100µA each) but does not include any current delivered to the battery through the BAT pin (approximately 100mA). Note 5: This parameter is not applicable to the LTC4068X. TYPICAL PERFOR A CE CHARACTERISTICS PROG Pin Voltage vs Supply Voltage (Constant Current Mode) VCC (V) 4 0.985 0.990 0.995 1.000 1.005 1.015 4.5 5 5.5 6 405842 G01 6.5 7 1.010 VCC = 5V VBAT = 4V TA = 25°C RPROG = 10k TEMPERATURE (°C) –50 0.9975 1.0000 1.0025 25 75 405842 G02 0.9950 0.9925 0.9900 –25 0 50 1.0050 1.0075 1.0100 100 VCC = 5V VBAT = 4V RPROG = 10k VPROG (V) 0 0 100 200 300 400 600 0.2 0.4 0.6 0.8 405842 G03 1 1.2 500 VCC = 5V TA = 25°C RPROG = 2k RTERM = 2k PROG Pin Voltage vs Temperature Charge Current vs PROG Pin Voltage |
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