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LT3481EMSE Datasheet(PDF) 3 Page - Linear Technology |
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LT3481EMSE Datasheet(HTML) 3 Page - Linear Technology |
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3 / 24 page  LT3481 3 3481fb PARAMETER CONDITIONS MIN TYP MAX UNITS Minimum Input Voltage ● 3 3.6 V Quiescent Current from VIN VRUN/SS = 0.2V 0.01 0.5 μA VBIAS = 3V, Not Switching ● 22 60 μA VBIAS = 0, Not Switching 75 120 μA Quiescent Current from BIAS VRUN/SS = 0.2V 0.01 0.5 μA VBIAS = 3V, Not Switching ● 50 120 μA VBIAS = 0, Not Switching 05 μA Minimum Bias Voltage 2.7 3 V Feedback Voltage ● 1.25 1.24 1.265 1.265 1.29 1.3 V V FB Pin Bias Current (Note 3) VFB = 1.25V, VC = 0.4V ● 30 100 nA FB Voltage Line Regulation 4V < VIN < 34V 0.002 0.02 %/V Error Amp GM 330 μMho Error Amp Gain 800 VC Source Current 65 μA VC Sink Current 85 μA VC Pin to Switch Current Gain 3.5 A/V VC Clamp Voltage 2V Switching Frequency RT = 8.66k RT = 29.4k RT = 187k 2.5 1.25 250 2.8 1.4 300 3.1 1.55 350 MHz MHz kHz Minimum Switch Off-Time ● 130 200 nS Switch Current Limit Duty Cycle = 5% 3.2 3.8 4.4 A Switch VCESAT ISW = 2A 360 mV Boost Schottky Reverse Leakage VSW = 10V, VBIAS = 0V 0.02 2 μA Minimum Boost Voltage (Note 4) ● 1.5 2.1 V BOOST Pin Current ISW = 1A 18 35 mA RUN/SS Pin Current VRUN/SS = 2.5V 5 10 μA RUN/SS Input Voltage High 2.5 V RUN/SS Input Voltage Low 0.2 V PG Threshold Offset from Feedback Voltage VFB Rising 122 mV PG Hysteresis 5 mV PG Leakage VPG = 5V 0.1 1 μA PG Sink Current VPG = 3V ● 100 600 μA 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 LT3481E is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LT3481I specifications are guaranteed over the –40°C to 125°C temperature range. The LT3481H specifications are guaranteed over the –40°C to 150°C operating temperature range. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125°C. Note 3: Bias current flows into the FB pin. Note 4: This is the minimum voltage across the boost capacitor needed to guarantee full saturation of the switch. The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VRUNS/SS = 10V VBOOST = 15V, VBIAS = 3.3V unless otherwise noted. (Note 2) ELECTRICAL CHARACTERISTICS |
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