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LT1173 Datasheet(PDF) 2 Page - Linear Technology |
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LT1173 Datasheet(HTML) 2 Page - Linear Technology |
2 / 16 page LT1173 2 PACKAGE/ORDER I FOR ATIO LT1173CN8 LT1173CN8-5 LT1173CN8-12 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 (LT1173) ................................. 5V Sense Pin Voltage (LT1173, -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 Consult factory for Industrial and Military grade parts SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current Switch Off q 110 150 µA IQ Quiescent Current, Boost No Load LT1173-5 135 µA Mode Configuration LT1173-12 250 µA VIN Input Voltage Step-Up Mode q 2.0 12.6 V Step-Down Mode q 30 V Comparator Trip Point Voltage LT1173 (Note 1) q 1.20 1.245 1.30 V VOUT Output Sense Voltage LT1173-5 (Note 2) q 4.75 5.00 5.25 V LT1173-12 (Note 2) q 11.4 12.0 12.6 V Comparator Hysteresis LT1173 q 510 mV Output Hysteresis LT1173-5 q 20 40 mV LT1173-12 q 50 100 mV fOSC Oscillator Frequency q 18 23 30 kHz Duty Cycle Full Load q 43 51 59 % tON Switch ON Time ILIM tied to VIN q 17 22 32 µs Feedback Pin Bias Current LT1173, VFB = 0V q 10 50 nA Set Pin Bias Current VSET = VREF q 20 100 nA VOL Gain Block Output Low ISINK = 100µA, VSET = 1.00V q 0.15 0.4 V Reference Line Regulation 2.0V ≤ VIN ≤ 5V q 0.2 0.4 %/V 5V ≤ VIN ≤ 30V q 0.02 0.075 %/V VSAT SWSAT Voltage, Step-Up Mode VIN = 3.0V, ISW = 650mA q 0.5 0.65 V VIN = 5.0V, ISW = 1A 0.8 1.0 V q 1.4 V TA = 25°C, VIN = 3V, unless otherwise noted. ELECTRICAL C C HARA TERISTICS 1 2 3 4 8 7 6 5 TOP VIEW ILIM VIN SW1 SW2 FB (SENSE)* SET AO GND N8 PACKAGE 8-LEAD PLASTIC DIP *FIXED VERSIONS TJMAX = 90°C, θJA = 130°C/W TOP VIEW S8 PACKAGE 8-LEAD PLASTIC SOIC *FIXED VERSIONS 1 2 3 4 8 7 6 5 ILIM VIN SW1 SW2 FB (SENSE)* SET AO GND TJMAX = 90°C, θJA = 150°C/W LT1173CS8 LT1173CS8-5 LT1173CS8-12 ORDER PART NUMBER S8 PART MARKING 1173 11735 117312 |
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