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A8284SB Datasheet(PDF) 6 Page - Allegro MicroSystems |
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A8284SB Datasheet(HTML) 6 Page - Allegro MicroSystems |
6 / 8 page 8284 TWO-OUTPUT LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 6 Symbol Terminal Function OSEL 1 Logic input: selects between LNBA (when low) and LNBB (when high) OLF 2 Overload flag output: low when IO > IOM or TJ > 165 °C, high when IO < IOM and TJ < 130 °C VBULK 3 Tracking supply voltage to linear regulators LNBB 4 Output voltage to LNBB NC 5 No (internal) connection GND 6, 7 Ground SENSE 8 Current limit setup resistor LNBA 9 Output voltage to LNBA LX 10 Inductor drive point VIN 11 Supply input voltage (minimum, VLNB + 2.5 V) TCAP 12 Capacitor for setting the rise and fall time of the outputs LLC 13 Logic input: when high, increases output voltage by 1 V for line length compensation VSEL1 14 Logic input: output voltage select VSEL0 15 Logic input: output voltage select EN 16 Logic input: when high, enables device (LNB on) ENT 17 Logic input: when high, enables internal 22 kHz modulation GND 18, 19 Ground CPUMP 20 High side of charge-pump capacitor VPUMP 21 Gate supply voltage for high-side drivers PUMPX 22 Charge-pump drive VINT 23 Bypass capacitor for internal voltage reference EXTM 24 External modulation input Terminal Configuration |
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