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LTC4070 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4070 Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page LTC4070 3 4070f ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC4070E is guaranteed to meet performance specifications for junction temperatures from 0°C to 85°C. Specifications over the –40°C to 85°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LTC4070I is guaranteed over the full –40°C to 125°C operating junction temperature range. Note that the maximum ambient temperature is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. The l denotes the specifications which apply over the full operating junction temperature range. VNTC = VCC, TJ = 25°C unless otherwise specified. Current into a pin is positive and current out of a pin is negative. All voltages are referenced to GND unless otherwise noted. (Note 2) Note 3: The IDRV(SNK) current is tested by pulling the DRV pin up to VCC through a 475k resistor, RDRV. Pulling the DRV pin up to VCC with low impedance disables the regulator. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS High Battery Status VHBTH HBO Threshold (VFLOAT – VCC)VCC Rising l 15 40 60 mV VHBHY Hysteresis 100 mV Low Battery Status VLBTH LBO Threshold VCC Falling l 3.08 3.2 3.34 V VLBHY Hysteresis 220 290 350 mV Status Outputs HBO/LBO VOL CMOS Output Low ISINK = 1mA, VCC = 3.7V l 0.5 V VOH CMOS Output High VLBO: VCC = 3.1V, ISOURCE = –100μA VHBO: ICC = 1.5mA, ISOURCE = –500μA l VCC – 0.6 V 3-State Selection Input: ADJ VADJ ADJ Input Level Input Logic Low Level l 0.3 V Input Logic High Level l VCC – 0.3 V IADJ(Z) Allowable ADJ Leakage Current in Floating State l ±3 μA NTC INTC NTC Leakage Current 0V< NTC < VCC –50 0 50 nA INTCBIAS Average NTCBIAS Sink Current Pulsed Duty Cycle < 0.002% 30 pA ΔVFLOAT(NTC) Delta Float Voltage per NTC Comparator Step ICC = 1mA, NTC Falling Below One of the NTCTH Thresholds ADJ = 0V ADJ = Float ADJ = VCC –50 –75 –100 mV mV mV NTCTH1 NTC Comparator Falling Thresholds VNTC as % of VNTCBIAS Amplitude 35.5 36.5 37.5 % NTCTH2 28.0 29.0 30.0 % NTCTH3 21.8 22.8 23.8 % NTCTH4 16.8 17.8 18.8 % NTCHY Hysteresis 30 mV Drive Output IDRV(SOURCE) DRV Output Source Current VCC = 3.1V, VDRV = 0V –1 mA IDRV(SINK) DRV Output Sink Current ICC = 1mA, RDRV = 475k (Note 3) 3 μA |
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