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SL11RIDE-DK Datasheet Like any low-dropout regulator, the LP2989LV requires ex- ternal capacitors for regulator stability.These capacitors must be correctly selected for good performance. INPUT CAPACITOR: An input capacitor whose capacitance is at least 2.2 pF is required between the LP2989LV input and ground (the amount of capacitance may be increased without limit). Characterization testing performed on the LP2989LV has shown that if the amount of actual input capacitance drops below about l.5 pF, an unstable operating condition may result. Therefore, the next larger standard size (2.2 pF) is specified as the minimum required input capacitance. Ca- pacitor tolerance and temperature variation must be consid- ered when selecting a capacitor (see Capacitor Character istics section) to assure the minimum requirement of l.5 pF is met over all operating conditions. The input capacitor must be located at a distance of not more than 0.5' from the input pin and returned to a clean analog ground.Any good quality ceramic or tantalum may be used for this capacitor, assuming the minimum capacitance requirement is met. OUTPUT CAPACITOR: The LP2989LV requires a ceramic output capacitor whose size is at least 10 pF. The actual amount of capacitance on the output must never drop below about 7 pF or unstable operation may result. For this reason, capacitance tolerance and temperature characteristics must be considered when selecting an output capacitor The LP2989LV is designed specifically to work with ceramic output capacitors, utilizing circuitry which allows the regula- tor to be stable across the entire range of output current with an output capacitor whose ESR is as low as 4 ml . It may also be possible to use Tantalum or film capacitors at the output, but these are not as attractive for reasons of size and cost (see next section Capacitor Characteristics). The output capacitor must meet the requirement for mini- mum amount of capacitance and also have an ESR (equiva- lent series resistance) value which is within the stable range. Curves are provided which show the stable ESR range as a function of load current (see ESR graph below). SL11RIDE-DK Price
SL11RIDE-DK on stock A block write begins with a slave address and a write condition. After the command code the core logic issues a byte count which describes how many more bytes will follow in the mes- sage. If the host had 20 bytes to send, the first byte would be the number 20 (14h), followed by the 20 bytes of data. The byte count may not be 0. A block write command is allowed to
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