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$3.00 – $4.75 (AUD)
AMS1117-ADJ Voltage Regulator Low Drop Out +ADJ – 1A SOT-223 fixed low dropout voltage regulator with a dropout voltage of 1.3V at 1000mA. On-chip trimming adjusts the reference voltage to 1.5%
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AMS1117-ADJ Voltage Regulator Low Drop Out +ADJ – 1A SOT-223 is a fixed low dropout voltage regulator with a dropout voltage of 1.3V at 1000mA of load current. It offers current limiting and thermal shutdown and includes a Zener bandgap reference to assure output voltage accuracy to within ±1%.
Low-dropout (LDO) regulators work in the same way as all linear voltage regulators. The main difference between LDO and non-LDO regulators is their schematic topology. Instead of an emitter follower topology, low-dropout regulators use an open collector or open drain topology. In this topology, the transistor may be easily driven into saturation with the voltages available to the regulator.
This allows the voltage to drop from the unregulated voltage to the regulated voltage as low as the saturation voltage across the transistor.
If a bipolar transistor is used instead of a field-effect transistor or JFET, significant additional power may be lost to control it. In contrast, non-LDO regulators take that power from the voltage drop itself.
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