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LT1521IS8-3 Datasheet(PDF) 4 Page - Linear Technology |
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LT1521IS8-3 Datasheet(HTML) 4 Page - Linear Technology |
4 / 16 page 4 LT1521/LT1521-3 LT1521-3.3/LT1521-5 ELECTRICAL CHARACTERISTICS TEMPERATURE ( °C) –50 0.7 25 LT1521 • TPC02 0.4 0.2 –25 0 50 0.1 0 0.8 0.6 0.5 0.3 75 100 125 ILOAD = 1mA ILOAD = 50mA ILOAD = 150mA ILOAD = 300mA ILOAD = 100mA TEMPERATURE ( °C) –50 15.0 12.5 10.0 7.5 5.0 2.5 0 25 75 LT1521 • TPC03 –25 0 50 100 125 VIN = 6V RL = ∞ ILOAD = 0 VSHDN = OPEN VSHDN = 0V Quiescent Current Guaranteed Dropout Voltage OUTPUT CURRENT (mA) 0 150 250 LT1521 • TPC01 50 100 200 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 300 TJ ≤ 125°C TJ ≤ 25°C = TEST POINTS Dropout Voltage TYPICAL PERFORMANCE CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS Input Reverse Leakage Current VIN = – 20V, VOUT = 0V q 1.0 mA Reverse Output Current (Note 11) LT1521-3 VOUT = 3V, VIN < 3V, TJ = 25°C5 10 µA LT1521-3.3 VOUT = 3.3V, VIN < 3.3V, TJ = 25°C5 10 µA LT1521-5 VOUT = 5V, VIN < 5V, TJ = 25°C5 10 µA LT1521 (Note 5) VOUT = 3.8V, VIN < 3.75V, TJ = 25°C5 10 µA The q denotes specifications which apply over the full operating temperature range. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The shutdown pin input voltage rating is required for a low impedance source. Internal protection devices connected to the shutdown pin will turn on and clamp the pin to approximately 7V or – 0.6V. This range allows the use of 5V logic devices to drive the pin directly. For high 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 5mA. 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 LT1521 (adjustable version) is tested and specified with the adjust pin connected to the output pin. 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 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 total sum of the shutdown pin current (2 µA) and the ground pin current (4µA). 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. |
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