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LT1175CN8-5 Datasheet(PDF) 4 Page - Linear Technology |
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LT1175CN8-5 Datasheet(HTML) 4 Page - Linear Technology |
4 / 16 page 4 LT1175 1175fd TYPICAL PERFORMANCE CHARACTERISTICS Typical Current Limit Characteristics INPUT-TO-OUTPUT DIFFERENTIAL VOLTAGE (V) 0 0.6 0.5 0.4 0.3 0.2 0.1 0 510 15 20 1175 G02 25 CURVES REPRE- SENT MINIMUM GUARANTEED LIMITS AT ALL TEMPERATURES ILIM2, ILIM4 OPEN ILIM4 TIED TO VIN ILIM2 TIED TO VIN ILIM2, ILIM TIED TO VIN Guaranteed Current Limit JUNCTION TEMPERATURE (°C) –50 5.05 5.00 4.95 3.84 3.80 3.76 0 50 75 1175 G03 –25 25 100 125 OUTPUT FIXED 5V PART FEEDBACK VOLTAGE ADJUSTABLE PART Output Voltage Temperature Drift Minimum Input-to-Output Voltage OUTPUT CURRENT (A) 0 1.0 0.8 0.6 0.4 0.2 0 0.2 0.4 0.5 1175 G04 0.1 0.3 0.6 0.7 TJ = 25°C VIN REDUCED UNTIL OUTPUT VOLTAGE DROPS 1% ILIM2, ILIM4 OPEN ILIM2, ILIM4 TIED TO VIN ILIM4 TIED TO VIN ILIM2 TIED TO VIN Minimum Input-to-Output Voltage TEMPERATURE (°C) –50 100 80 60 40 20 0 0 50 75 1175 G06 –25 25 100 125 OUTPUT CURRENT (A) 0 1.0 0.8 0.6 0.4 0.2 0 0.2 0.4 0.5 1175 G05 0.1 0.3 0.6 0.7 VIN REDUCED UNTIL OUTPUT VOLTAGE DROPS 1%. ILIM2, ILIM4 TIED TO VIN TJ = 125°C TJ = –55°C TJ = 25°C SENSE Bias Current (Adjustable Part) INPUT-TO-OUTPUT DIFFERENTIAL VOLTAGE (V) 0 1.0 0.8 0.6 0.4 0.2 0 20 1175 G01 5 10 15 25 ILIM2, ILIM TIED TO VIN ILIM2, ILIM4 OPEN ILIM4 TIED TO VIN ILIM2 TIED TO VIN CURRENT LIMIT CHANGES ONLY SLIGHTLY WITH TEMPERATURE SO CURVES ARE REPRESENTATIVE OF ALL TEMPERATURES Shutdown Thresholds Shutdown Input Current SHDN Pin Characteristics SHUTDOWN TO GROUND VOLTAGE (V) –25 –20 –10 0 15 10 5 0 –5 –10 15 1175 G09 –15 –5 10 20 5 25 VIN = 25V CHARACTERISTICS DO NOT CHANGE SIGNIFICANTLY WITH TEMPERATURE, SO A SINGLE CURVE IS SHOWN. POSITIVE CURRENT FLOWS INTO SHDN PIN IF SHDN PIN IS NEGATIVE WITH RESPECT TO INPUT VOLTAGE AND INPUT VOLTAGE IS LESS THAN 15V, NEGATIVE BREAKOVER POINT WILL BE ABOUT 8V BELOW –VIN TEMPERATURE (°C) –50 2.5 2.0 1.5 1.0 0.5 0 0 50 25 75 1175 G08 –25 100 125 POSITIVE THRESHOLD NEGATIVE THRESHOLD DEVICE IS OFF BELOW THRESHOLD INPUT VOLTAGE (V) 0 25 20 15 10 5 0 20 1175 G07 5 10 15 25 TJ = 125°C TJ = –55°C TJ = 25°C |
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