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LT1121ACS8 Datasheet(PDF) 4 Page - Linear Technology |
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LT1121ACS8 Datasheet(HTML) 4 Page - Linear Technology |
4 / 16 page 4 LT1121/LT1121-3.3/LT1121-5 1121fe impedance sources or logic running on supply voltages greater than 5.5V, the maximum current driven into the shutdown pin must be limited to less than 20mA. Note 3: For junction temperatures greater than 110 °C, a minimum load of 1mA is recommended. For TJ > 110°C and IOUT < 1mA, output voltage may increase by 1%. Note 4: Operating conditions are limited by maximum junction temperature. The regulated output voltage specification will not apply for all possible combinations of input voltage and output current. When operating at maximum input voltage, the output current range must be limited. When operating at maximum output current the input voltage range must be limited. Note 5: The LT1121 (adjustable version) is tested and specified with the adjust pin connected to the output pin. ELECTRICAL CHARACTERISTICS Note 6: Dropout voltage is the minimum input/output voltage required to maintain regulation at the specified output current. In dropout the output voltage will be equal to: (VIN – VDROPOUT). Note 7: Ground pin current is tested with VIN = VOUT (nominal) and a current source load. This means that the device is tested while operating in its dropout region. This is the worst case ground pin current. The ground pin current will decrease slightly at higher input voltages. Note 8: Adjust pin bias current flows into the adjust pin. Note 9: Shutdown pin current at VSHDN = 0V flows out of the shutdown pin. Note 10: Quiescent current in shutdown is equal to the sum total of the shutdown pin current (6 μA) and the ground pin current (9μA). Note 11: Reverse output current is tested with the input pin grounded and the output pin forced to the rated output voltage. This current flows into the output pin and out of the ground pin. LT1121-3.3 Quiescent Current Guaranteed Dropout Voltage Dropout Voltage Quiescent Current LT1121 Quiescent Current LT1121-5 Quiescent Current OUTPUT CURRENT (mA) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 40 80 120 1121 G27 20 60 140 160 0 100 = TEST POINTS TJ ≤ 125°C TJ ≤ 25°C TEMPERATURE ( °C) –50 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 50 75 1121 G14 –25 25 100 125 ILOAD = 150mA ILOAD = 50mA ILOAD = 1mA ILLOAD = 100mA TEMPERATURE ( °C) –50 50 40 30 20 10 0 0 50 75 1121 G11 –25 25 100 125 VIN = 6V RLOAD = ∞ VSHDN =0V VSHDN = OPEN INPUT VOLTAGE (V) 0 120 100 80 60 40 20 0 8 1121 G03 2 4 6 10 135 79 VSHDN = 0V TJ = 25°C RLOAD = ∞ VOUT = VADJ VSHDN = OPEN INPUT VOLTAGE (V) 0 120 100 80 60 40 20 0 8 1121 G02 2 4 6 10 135 79 TJ = 25°C RLOAD = ∞ VSHDN = 0V VSHDN = OPEN INPUT VOLTAGE (V) 0 120 100 80 60 40 20 0 8 1121 G04 2 4 6 10 135 79 VSHDN = 0V TJ = 25°C RLOAD = ∞ VSHDN = OPEN TYPICAL PERFOR A CE CHARACTERISTICS |
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