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Dual ±15-volt voltage regulator [65] LM330 5-volt positive voltage regulator, 0.6 V input-output difference [66] LM333 Yes Adjustable 3 A negative voltage regulator (-1.2 V to -32 V) [67] LM137 LM237 LM337 Adjustable 1.5 A negative voltage regulator (-1.2 V to -37 V) [68] LM138 LM338 Adjustable 5 A voltage regulator (1.2 V-32 V) [69] LM140 LM340
The 78xx line are positive voltage regulators: they produce a voltage that is positive relative to a common ground. There is a related line of 79xx devices which are complementary negative voltage regulators. 78xx and 79xx ICs can be used in combination to provide positive and negative supply voltages in the same circuit. [1]
An integrated circuit voltage regulator. A voltage regulator is a system designed to automatically maintain a constant voltage. It may use a simple feed-forward design or may include negative feedback. It may use an electromechanical mechanism, or electronic components. Depending on the design, it may be used to regulate one or more AC or DC ...
The mechanism used is similar enough that a voltage divider can be used in the same way as with the LM317 and the output follows the same formula, using the regulator's fixed voltage for V ref (e.g. 5 V for 7805). However, the 78xx device's quiescent current is substantially higher and less stable.
5 V, output of up to 2 A, 3.3 V, 250 mA LDO voltage regulator; Variable Voltage supply of 1.25 V to 29 V, up to 2 A (Vin - 1 V) Reverse polarity and short circuit protection; 1.8" TFT display screen along with 5-way joystick and a pair of potentiometers, slide switch, and tactile.
In order to supply large amounts of low-voltage power to the Pentium and subsequent microprocessors, a special power supply, the voltage regulator module began to be included on motherboards. Newer processors require up to 100 A at 2 V or less, which is impractical to deliver from off-board power supplies.
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