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LT1375CN8 Datasheet(PDF) 5 Page - Linear Technology |
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LT1375CN8 Datasheet(HTML) 5 Page - Linear Technology |
5 / 28 page 5 LT1375/LT1376 TYPICAL PERFORMANCE CHARACTERISTICS TEMPERATURE ( °C) –50 500 400 300 200 8 4 0 25 75 1375/76 G04 –25 0 50 100 125 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) Shutdown Pin Bias Current JUNCTION TEMPERATURE ( °C) –50 2500 2000 1500 1000 500 0 0 50 75 1375/76 G02 –25 25 100 125 Error Amplifier Transconductance FREQUENCY (Hz) 3000 2500 2000 1500 1000 500 200 150 100 50 0 –50 100 10k 100k 10M 1375/76 G03 1k 1M GAIN PHASE ERROR AMPLIFIER EQUIVALENT CIRCUIT ROUT 200k COUT 12pF VC RLOAD = 50Ω VFB 2 • 10 –3 ) ( Error Amplifier Transconductance Frequency Foldback LOAD CURRENT (mA) 0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 10 100 1000 1375/76 G12 MINIMUM INPUT VOLTAGE CAN BE REDUCED BY ADDING A SMALL EXTERNAL PNP. SEE APPLICATIONS INFORMATION MINIMUM VOLTAGE TO START WITH STANDARD CIRCUIT MINIMUM VOLTAGE TO RUN WITH STANDARD CIRCUIT LT1376 Minimum Input Voltage with 5V Output Shutdown Supply Current INPUT VOLTAGE (V) 0 30 25 20 15 10 5 0 510 15 20 1375/76 G06 25 VSHUTDOWN = 0V JUNCTION TEMPERATURE ( °C) –50 2.40 2.36 2.32 0.8 0.4 0 25 75 1375/76 G05 –25 0 50 100 125 STANDBY START-UP SHUTDOWN Standby and Shutdown Thresholds Shutdown Supply Current SHUTDOWN VOLTAGE (V) 0 150 125 100 75 50 25 0 0.1 0.2 0.3 0.4 1375/76 G07 0.5 VIN = 25V VIN = 10V FEEDBACK PIN VOLTAGE (V) 0 500 400 300 200 100 0 2.0 1375/76 G10 0.5 1.0 1.5 2.5 SWITCHING FREQUENCY FEEDBACK PIN CURRENT Switching Frequency JUNCTION TEMPERATURE ( °C) –50 600 550 500 450 400 100 1375/76 G11 –25 0 25 50 75 125 |
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