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LT3022IDHC-TRPBF Datasheet(PDF) 8 Page - Linear Technology |
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LT3022IDHC-TRPBF Datasheet(HTML) 8 Page - Linear Technology |
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8 / 16 page  LT3022 3022f pin FuncTions NC (Pins 1, 2, 8, 15, 16): No Connect Pins. These pins have no connection to internal circuitry. These pins may be floated, tied to VIN or tied to GND for improved thermal performance. OUT (Pins 3, 4): These pins supply power to the load. Use a minimum output capacitor of 10µF to prevent os- cillations. Large load transient applications require larger output capacitors to limit peak voltage transients. See the Applications Information section for more information on outputcapacitanceandreverse-outputcharacteristics.The LT3022 requires a 1mA minimum load current to ensure proper regulation and stability. ADJ (Pin 5): This pin is the error amplifier inverting ter- minal. Its 30nA typical input bias current flows out of the pin (see curve of ADJ Pin Bias Current vs Temperature in the Typical Performance Characteristics). The ADJ pin reference voltage is 200mV (referred to AGND). AGND (Pins 6, 7): Analog Ground. Tie these pins directly to PGND (Pins 10, 11) and the exposed backside GND (Pin 17). Connect the bottom of the external resistor divider, setting output voltage, directly to AGND for op- timum regulation. SHDN (Pin 9): Pulling the SHDN pin low puts the LT3022 into a low power state and turns the output off. Drive the SHDNpinwitheitherlogicoranopen-collector/draindevice with a pull-up resistor. The resistor supplies the pull-up current to the open collector/drain logic, normally several microamperes, and the SHDN pin current, typically 3µA. If unused, connect the SHDN pin to VIN. The LT3022 does not function if the SHDN pin is not connected. PGND (Pins 10, 11): Power Ground. The majority of ground pin current flows out of PGND. Tie these pins directly to AGND (Pins 6, 7) and the exposed backside GND (Pin 17). IN(Pins12,13,14):Thesepinssupplypowertothedevice. The LT3022 requires a bypass capacitor at IN if located more than six inches from the main input filter capacitor. Include a bypass capacitor in battery-powered circuits as a battery’s output impedance rises with frequency. A minimum bypass capacitor of 10µF suffices. The LT3022 withstands reverse voltages on the IN pin with respect to ground and the OUT pin. In the case of a reversed input, which occurs if a battery is plugged in backwards, the LT3022 behaves as if a diode is in series with its input. No reverse current flows into the LT3022 and no reverse voltage appears at the load. The device protects itself and the load. GND (Pin 17): Exposed Pad. Tie this pin directly to AGND (Pins 6, 7), PGND (Pins 10, 11) and the PCB ground. This pin provides enhanced thermal performance with its con- nection to the PCB ground. See the Applications Informa- tion section for thermal considerations and calculating junction temperature. |
Similar Part No. - LT3022IDHC-TRPBF |
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Similar Description - LT3022IDHC-TRPBF |
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