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LT1108CN8 Datasheet(PDF) 2 Page - Linear Technology |
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LT1108CN8 Datasheet(HTML) 2 Page - Linear Technology |
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2 / 12 page  2 LT1108 A G A U A R BSOLUTEXI TI S Supply Voltage (VIN) ............................................... 36V SW1 Pin Voltage (VSW1) ......................................... 50V SW2 Pin Voltage (VSW2) ............................ – 0.5V to VIN Feedback Pin Voltage (LT1108) ............................. 5.5V Sense Pin Voltage (LT1108, -5, -12) ...................... 36V Maximum Power Dissipation ............................ 500mW Maximum Switch Current ...................................... 1.5A Operating Temperature Range .................... 0 °C to 70°C Storage Temperature Range ................ – 65 °C to 150°C Lead Temperature (Soldering, 10 sec) ................. 300 °C PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER LT1108CS8 LT1108CS8-5 LT1108CS8-12 S8 PART MARKING ORDER PART NUMBER LT1108CN8 LT1108CN8-5 LT1108CN8-12 TJMAX = 90°C, θJA = 150°C/W TJMAX = 90°C, θJA = 130°C/W 1 2 3 4 8 7 6 5 TOP VIEW ILIM VIN SW1 SW2 FB (SENSE*) SET A0 GND N8 PACKAGE 8-LEAD PLASTIC DIP *FIXED VERSIONS 1 2 3 4 8 7 6 5 TOP VIEW ILIM VIN SW1 SW2 FB (SENSE*) SET A0 GND S8 PACKAGE 8-LEAD PLASTIC SOIC *FIXED VERSIONS ELECTRICAL C C HARA TERISTICS T A = 25°C, VIN = 3V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current Switch OFF q 110 150 µA Quiescent Current, Boost Mode Configuration No Load LT1108-5 135 µA LT1108-12 250 µA VIN Input Voltage Step-Up Mode q 2 12.6 V Step-Down Mode q 30.0 V Comparator Trip Point Voltage LT1108 (Note 1) q 1.2 1.245 1.3 V VOUT Output Sense Voltage LT1108-5 (Note 2) q 4.75 5 5.25 V LT1108-12 (Note 2) q 11.4 12 12.6 V Comparator Hysteresis LT1108 q 510 mV Output Hysteresis LT1108-5 q 20 40 mV LT1108-12 q 50 100 mV fOSC Oscillator Frequency q 14 19 25 kHz Duty Cycle Full Load, Step-Up Mode q 63 70 78 % tON Switch-ON Time ILIM Tied to VIN, Step-Up Mode q 28 36 48 µs Feedback Pin Bias Current LT1108, VFB = 0V q 10 50 nA Set Pin Bias Current VSET = VREF q 20 100 nA VOL Gain Block Output Low ISINK = 100µA, VSET = 1V q 0.15 0.4 V Reference Line Regulation 2V ≤ VIN ≤ 5V q 0.20 0.400 %/V 5V ≤ VIN ≤ 30V q 0.02 0.075 %/V VSAT SWSAT Voltage, Step-Up Mode VIN = 3V, ISW = 650mA q 0.5 0.65 V VIN = 5V, ISW = 1A 0.8 1.00 V 1108 10805 10812 |
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