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LT3495 Datasheet(PDF) 3 Page - Linear Technology |
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LT3495 Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page LT3495/LT3495B/ LT3495-1/LT3495B-1 3 3495b1b1f 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 LT3495/LT3495B/LT3495-1/LT3495B-1 are guaranteed to meet performance specifications from 0°C to 125°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. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Switch Current Limit LT3495-1/LT3495B-1 l 275 350 450 mA Switch VCESAT LT3495/LT3495B, ISW = 400mA LT3495-1/LT3495B-1, ISW = 200mA 200 125 mV mV Switch Leakage Current VSW = 5V 0.01 1 μA PMOS Disconnect Current Limit After Start-Up During Start-Up 250 110 370 150 450 190 mA mA PMOS Disconnect VCAP – VOUT IOUT = 50mA, VCAP = 15V 150 mV VCAP – VOUT Clamp Voltage 8.7 V SHDN Input Voltage High 1.5 V SHDN Input Voltage Low 0.3 V SHDN Pin Bias Current VSHDN = 3V VSHDN = 0V 5.3 0 8μA μA CTRL Pin Bias Current VCTRL = 0.5V, Current Flows Out of Pin l 20 100 nA CTRL to FB Offset VCTRL = 0.5V 6 14 mV Maximum Shunt Current LT3495/LT3495-1, VFB = 1.5V 230 μA Note 3: Internal reference voltage is determined by finding VFB voltage level which causes quiescent current to increase 150μA above “Not Switching” level. Note 4: If CTRL is overriding the internal reference, Start-Up mode occurs when VFB is less then half the voltage on CTRL. If CTRL is not overriding the internal reference, Start-Up mode occurs when VFB is less then half the voltage of the internal reference. TYPICAL PERFORMANCE CHARACTERISTICS T A = 25°C unless otherwise noted. Switching Frequency vs Load Current Load Regulation VOUT vs CTRL Voltage LOAD CURRENT (mA) 0 1000 800 400 200 600 0 80 40 3495 G01 120 60 20 100 VCC = 3.6V VOUT = 16V FIGURE 7 CIRCUIT LOAD CURRENT (mA) 0 1.5 1.0 0.0 –0.5 –1.0 0.5 –1.5 80 40 3495 G02 120 60 20 100 VCC = 3.6V VOUT = 16V FIGURE 7 CIRCUIT CTRL VOLTAGE (V) 0 18 15 9 6 3 12 0 1.2 0.6 3495 G03 1.5 0.9 0.3 FIGURE 7 CIRCUIT |
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