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LT1766EFE Datasheet(PDF) 6 Page - Linear Technology |
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LT1766EFE Datasheet(HTML) 6 Page - Linear Technology |
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6 / 30 page  LT1766/LT1766-5 6 1766fc DUTY CYCLE (%) 1.0 1.5 2.0 2.5 20 40 TYPICAL 60 80 1766 G01 100 0 GUARANTEED MINIMUM TA = 25°C JUNCTION TEMPERATURE (°C) –50 1.224 1.229 1.234 25 75 1766 G02 1.219 1.214 –25 0 50 100 125 150 1.209 1.204 1.5 2.0 1.0 0.5 0 VOLTAGE CURRENT JUNCTION TEMPERATURE (°C) –50 250 200 150 100 12 6 0 25 75 1766 G03 –25 0 50 100 150 125 CURRENT REQUIRED TO FORCE SHUTDOWN (FLOWS OUT OF PIN). AFTER SHUTDOWN, CURRENT DROPS TO A FEW μA AT 2.38V STANDBY THRESHOLD (CURRENT FLOWS OUT OF PIN) TYPICAL PERFORMANCE CHARACTERISTICS Switch Peak Current Limit SHDN Pin Bias Current Shutdown Supply Current Lockout and Shutdown Thresholds Shutdown Supply Current Error Amplifier Transconductance FB Pin Voltage and Current Error Amplifier Transconductance JUNCTION TEMPERATURE (°C) –50 50 100 1766 G04 0 25 75 2.4 2.0 1.6 1.2 0.8 0.4 0 –25 150 125 LOCKOUT START-UP SHUTDOWN INPUT VOLTAGE (V) 0 1766 G05 10 20 30 40 50 60 40 35 30 25 20 15 10 5 0 VSHDN = 0V TA = 25°C SHUTDOWN VOLTAGE (V) 0 0 50 100 150 200 250 300 0.1 0.2 0.3 0.4 1766 G06 0.5 VIN = 60V VIN = 15V TA = 25°C JUNCTION TEMPERATURE (°C) 1766 G07 2500 2000 1500 1000 500 0 –50 50 100 0 25 75 –25 150 125 FREQUENCY (Hz) 3000 2500 2000 1500 1000 500 200 150 100 50 0 –50 100 10k 100k 10M 1766 G08 1k 1M GAIN PHASE ERROR AMPLIFIER EQUIVALENT CIRCUIT ROUT 200k COUT 12pF VC RLOAD = 50Ω VFB 2 • 10 –3 ) ( TA = 25°C VFB (V) 0 300 400 600 500 1766 G09 200 100 0 0.5 1.0 1.5 SWITCHING FREQUENCY FB PIN CURRENT TA = 25°C Frequency Foldback |
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