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LT3014 Datasheet(PDF) 6 Page - Linear Technology |
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LT3014 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 16 page  6 LT3014 3014fb IN (Pin 1/Pin 8): Input. Power is supplied to the device through the IN pin. A bypass capacitor is required on this pin if the device is more than six inches away from the main input filter capacitor. In general, the output impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-powered circuits. A bypass capacitor in the range of 0.1 µF to 10µF is sufficient. The LT3014 is designed to withstand reverse voltages on the IN pin with respect to ground and the OUT pin. In the case of a reversed input, which can happen if a battery is plugged in backwards, the LT3014 will act as if there is a diode in series with its input. There will be no reverse current flow into the LT3014 and no reverse voltage will appear at the load. The device will protect both itself and the load. GND (Pin 2/Pins 4, 9): Ground. SHDN (Pin 3/Pin 5): Shutdown. The SHDN pin is used to put the LT3014 into a low power shutdown state. The output will be off when the SHDN pin is pulled low. The SHDN pin can be driven either by 5V logic or open- collector logic with a pull-up resistor. The pull-up resistor is only required to supply the pull-up current of the open- collector gate, normally several microamperes. If unused, the SHDN pin must be tied to IN or to a logic high. PI FU CTIO S (SOT-23 Package/DD Package) TIME ( µs) 0 –0.02 0.02 800 3014 G23 4 –0.04 0 0.04 6 2 0 200 400 600 1000 VIN = 7V VOUT = 5V CIN = COUT = 0.47µF CERAMIC ∆ILOAD = 1mA TO 5mA TYPICAL PERFOR A CE CHARACTERISTICS 10Hz to 100kHz Output Noise VOUT 200 µV/DIV COUT = 0.47µF 1ms/DIV 3014 G22 IL = 20mA VOUT = 1.22V Transient Response Load Regulation Minimum Input Voltage Output Noise Spectral Density TEMPERATURE ( °C) –50 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 25 75 3014 G19 –25 0 50 100 125 ILOAD = 20mA TEMPERATURE ( °C) –50 –5 25 3014 G20 –20 –30 –25 0 50 –35 –40 0 –10 –15 –25 75 100 125 ∆IL = 100µA TO 20mA VOUT = 1.22V FREQUENCY (Hz) 0.1 1 10 1k 10k 100k 3014 G21 0.01 100 10 COUT = 0.47µF IL = 20mA VOUT = 1.22V |
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