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LT1109 Datasheet(PDF) 2 Page - Linear Technology |
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LT1109 Datasheet(HTML) 2 Page - Linear Technology |
2 / 8 page LT1109 2 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current Switch Off q 320 550 µA Minimum Start-Up Voltage 1.6 V at VOUT Pin (Z Package) VIN Input Voltage (N8, S8 Package) q 3V Comparative Trip Point Voltage LT1109 q 1.20 1.25 1.30 V VOUT Output Voltage LT1109-5; 3V ≤ VIN ≤ 5V q 4.75 5.00 5.25 V LT1109-12; 3V ≤ VIN ≤ 12V q 11.52 12.00 12.55 V Comparator Hysteresis LT1109 q 8 12.5 mV Output Voltage Ripple LT1109-5 q 25 50 mV LT1109-12 q 60 120 mV fOSC Oscillator Frequency 100 120 140 kHz q 90 150 kHz tON Switch ON Time 3.3 4.2 5.3 µs q 3.0 5.5 µs DC Duty Cycle Full Load q 45 50 60 % VCESAT Switch Saturation Voltage ISW = 500mA 0.4 0.7 V LT1109-5: VIN = 3V; LT1109-12: VIN = 5V q 0.5 0.8 V TA = 25°C, VIN = 3V (LT1109CN8, LT1109CS8), unless otherwise specified. ELECTRICAL C C HARA TERISTICS PACKAGE/ORDER I FOR ATIO 1 2 3 4 8 7 6 5 TOP VIEW VIN NC SW GND SENSE SHUTDOWN NC NC N8 PACKAGE 8-LEAD PLASTIC DIP LT1109 • PO102 1 2 3 4 8 7 6 5 TOP VIEW SENSE SHUTDOWN NC NC VIN NC SW GND S8 PACKAGE 8-LEAD PLASTIC SOIC LT1109 • PO103 TJMAX = 100°C, θJA = 130°C/W TJMAX = 100°C, θJA = 150°C/W TJMAX = 100°C, θJA = 160°C/W GND 2 SW 3 1 Z PACKAGE 3-LEAD TO-92 PLASTIC BOTTOM VIEW OUT V LT1109 • POI01 LT1109CZ-5 LT1109CZ-12 ORDER PART NUMBER ORDER PART NUMBER S8 PART MARKING ORDER PART NUMBER LT1109CS8 LT1109CS8-5 LT1109CS8-12 LT1109CN8 LT1109CN8-5 LT1109CN8-12 1109 10905 10912 Operating Temperature Range ..................... 0 °C to 70°C Storage Temperature Range ................. – 65 °C to 150°C Lead Temperature (Soldering, 10 sec.)................. 300 °C Switch Current ........................................................ 1.2A A G A U A R BSOLUTEXI TI S (Voltages Referred to GND Pin) Supply Voltage (VOUT) .............................. –0.4V to 20V SW Pin Voltage .......................................... – 0.4V to 50V SHUTDOWN Pin Voltage ......................................... 6.0V Maximum Power Dissipation ............................. 300mW |
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