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LT1247 Datasheet(PDF) 2 Page - Linear Technology |
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LT1247 Datasheet(HTML) 2 Page - Linear Technology |
2 / 12 page LT1246/LT1247 2 PARAMETER CONDITIONS MIN TYP MAX UNITS Reference Section Output Voltage IO = 1mA, TJ = 25°C 4.925 5.000 5.075 V Line Regulation 12V < VCC < 25V q 320 mV Load Regulation 1mA < IREF < 20mA q –6 – 25 mV Temperature Stability 0.1 mV/ °C Total Output Variation Line, Load, Temperature q 4.87 5.13 V Output Noise Voltage 10Hz < F < 10kHz, TJ = 25°C50 µV Long-Term Stability TA = 125°C, 1000 Hrs. 5 25 mV Output Short-Circuit Current q –30 – 90 –180 mA Oscillator Section Initial Accuracy RT = 10k, CT = 3.3nF, TJ = 25°C 47.5 50 52.5 kHz RT = 6.2k, CT = 500pF, TJ = 25°C 465 500 535 kHz Voltage Stability 12V < VCC < 25V, TJ = 25°C1 % Temperature Stability TMIN < TJ < TMAX – 0.05 %/ °C Amplitude Pin 4 1.7 V Clock Ramp Reset Current VOSC (Pin 4) = 2V, TJ = 25°C 7.9 8.2 8.5 mA Error Amplifier Section Feedback Pin Input Voltage VPIN 1 = 2.5V q 2.42 2.50 2.58 V Input Bias Current VFB = 2.5V q –2 µA Open-Loop Voltage Gain 2 < VO < 4V q 65 90 dB Unity-Gain Bandwidth TJ = 25°C 1 2 MHz Power Supply Rejection Ratio 12V < VCC < 25V q 60 dB Output Sink Current VPIN 2 = 2.7V, VPIN 1 = 1.1V q 26 mA Output Source Current VPIN 2 = 2.3V, VPIN 1 = 5V q – 0.5 – 0.75 mA (Notes 1, 2) ELECTRICAL C C HARA TERISTICS PACKAGE/ORDER I FOR ATIO A G A U A R BSOLUTEXI TI S Supply Voltage ....................................................... 25V Output Current ...................................................... ±1A* Output Energy (Capacitive Load per Cycle) ............. 5 µJ Analog Inputs (Pins 2, 3) .............................. – 0.3 to 6V Error Amplifier Output Sink Current ..................... 10mA Power Dissipation at TA ≤ 25°C ............................... 1W Operating Junction Temperature Range LT1246C/LT1247C ............................. 0 °C to 100°C Storage Temperature Range ................ – 65 °C to 150°C Lead Temperature (Soldering, 10 sec)................. 300 °C *The 1A rating for output current is based on transient switching requirements. S8 PART MARKING LT1246CN8 LT1246CS8 LT1247CN8 LT1247CS8 ORDER PART NUMBER 1246 1247 Consult factory for Industrial and Military grade parts. 1 2 3 4 8 7 6 5 TOP VIEW COMP FB ISENSE RT/CT VREF VCC OUTPUT GND N8 PACKAGE 8-LEAD PDIP S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 100°C, θJA = 130°C/W (N8) TJMAX = 100°C, θJA = 150°C/W (S8) |
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