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The 7805 is the most common, as its regulated 5-volt supply provides a convenient power source for most TTL components. Less common are lower-power versions such as the LM78Mxx series (500 mA) and LM78Lxx series (100 mA) from National Semiconductor.
While an ATX power supply is connected to the mains supply, it always provides a 5-volt standby (5VSB) power so that the standby functions on the computer and certain peripherals are powered. ATX power supplies are turned on and off by a signal from the motherboard .
A simple general-purpose desktop power supply used in electronic labs, with power output connector seen at lower-left and power input connector (not shown) located at the rear Interior of high-end linear power supply with toroidal mains transformer. A power supply is an electrical device that supplies electric power to an electrical load.
Adjustable 5 A voltage regulator (1.2 V-32 V) [69] LM140 LM340 LM78xx 1 A positive voltage regulator (5 V, 12 V, 15 V), can be adjustable [70] [71] LM341 LM78Mxx: 0.5 A protected positive voltage regulators (5 V, 12 V, 15 V) [72] LM145 LM345 Yes Fixed 3 A, -5-volt negative voltage regulator [73] LM150 LM350 only LM150
The linear type produces only very little noise (or "ripple voltage") and is less prone to external electromagnetic and radio frequency interference (EMI, RFI), making it preferable for audio equipment and radio-related applications and for powering delicate circuitry. [5] Linear power supplies also have fewer failable parts which increases ...
As linear regulators, the LM317 and LM337 are used in DC to DC converter applications. Linear regulators inherently waste power; the power dissipated is the current passed multiplied by the voltage difference between input and output. A LM317 commonly requires a heat sink to prevent the operating temperature from rising too high. For large ...
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