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LTC3631EDD-3.3-TRPBF Datasheet(PDF) 3 Page - Linear Technology |
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LTC3631EDD-3.3-TRPBF Datasheet(HTML) 3 Page - Linear Technology |
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3 / 22 page  LTC3631 3 3631fb ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are for TA = 25°C (Note 2). VIN = 10V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply (VIN) VIN Input Voltage Operating Range 4.5 45 V UVLO VIN Undervoltage Lockout VIN Rising VIN Falling Hysteresis l l 3.80 3.75 4.15 4.00 150 4.50 4.35 V V mV OVLO VIN Overvoltage Lockout VIN Rising VIN Falling Hysteresis 47 45 50 48 2 52 50 V V V IQ DC Supply Current (Note 3) Active Mode Sleep Mode Shutdown Mode VRUN = 0V 125 12 3 220 22 6 μA μA μA Output Supply (VOUT/VFB) VOUT Output Voltage Trip Thresholds LTC3631-3.3V, VOUT Rising LTC3631-3.3V, VOUT Falling l l 3.260 3.240 3.310 3.290 3.360 3.340 V V LTC3631-5V, VOUT Rising LTC3631-5V, VOUT Falling l l 4.940 4.910 5.015 4.985 5.090 5.060 V V VFB Feedback Comparator Trip Voltage VFB Rising l 0.792 0.800 0.808 V VHYST Feedback Comparator Hysteresis l 357 mV IFB Feedback Pin Current Adjustable Output Version, VFB = 1V –10 0 10 nA ΔVLINEREG Feedback Voltage Line Regulation VIN = 4.5V to 45V LTC3631-5, VIN = 6V to 45V 0.001 %/V Operation VRUN Run Pin Threshold Voltage RUN Rising RUN Falling Hysteresis 1.17 1.06 1.21 1.10 110 1.25 1.14 V V mV IRUN Run Pin Leakage Current RUN = 1.3V –10 0 10 nA VHYSTL Hysteresis Pin Voltage Low RUN < 1V, IHYST = 1mA 0.07 0.1 V IHYST Hysteresis Pin Leakage Current VHYST = 1.3V –10 0 10 nA ISS Soft-Start Pin Pull-Up Current VSS < 1.5V 4.5 5.5 6.5 μA tINTSS Internal Soft-Start Time SS Pin Floating 0.75 ms IPEAK Peak Current Trip Threshold ISET Floating 500k Resistor from ISET to GND ISET Shorted to GND l 200 40 225 120 50 280 65 mA mA mA RON Power Switch On-Resistance Top Switch Bottom Switch ISW = –25mA ISW = 25mA 3.0 1.5 Ω Ω 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 LTC3631 is tested under pulsed load conditions such that TJ ≈ TA. The LTC3631E is guaranteed to meet specifications from 0°C to 85°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3631I is guaranteed over the full –40°C to 125°C operating junction temperature range. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal impedance and other environmental factors. The junction temperature (TJ, in °C) is calculated from the ambient temperature (TA, in °C) and power dissipation (PD, in Watts) according to the formula: TJ = TA + (PD • θJA) where θJA (in °C/W) is the package thermal impedance. Note 3: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See Applications Information. |
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