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SC250WLTRT Datasheet(PDF) 7 Page - Semtech Corporation |
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SC250WLTRT Datasheet(HTML) 7 Page - Semtech Corporation |
7 / 18 page 7 © 2006 Semtech Corp. www.semtech.com SC250 PRELIMINARY POWER MANAGEMENT Pin Descriptions Pin # Pin Name Pin Function 1LX Inductor connection to the switching FETs 2 VIN Input voltage connection 3 VREF 2.85V, 20mA reference supply — can be used as a supply for power amplifier bias inputs or to supply a resistive divider on V DAC to set a fixed level of VOUT. 4 GND Ground connection 5 VDAC Analog control voltage input ranges between 0.1 and 1.2V for control of V OUT in accordance with the V OUT= 3 x VDAC transfer function. VDAC > 1.4V enables pass-through mode using the internal pass MOSFET. 6 VOUT Regulated output voltage and feedback 7EN Enable digital input: a high input enables the SC250, a low disables the output and reduces quiescent current to less than 1μA and LX becomes high impedance. 8 PGND Ground reference for internal N-channel MOSFET |
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