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What is the output voltage range and maximum output current of the LM317?
The LM317 device is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. It requires only two external resistors to set the output voltage. The device features a typical line regulation of 0.01% and typical load regulation of 0.1%.
How do I get current booster?
The current boosting can be achieved by using external transistor connected in parallel with regulator IC. Thus the output current of 78XX regulator which is 1A can be boosted. The IC 7805 regulator with current booster is shown below.
What is current booster?
The current-booster is a drop-in replacement for the class B follower. For very high current demands, Darlingtons or multi-stage designs may be required. It is even possible to provide voltage gain stages. Indeed, several consumer audio power amplifiers have been designed in exactly this way.
How do you calculate the output voltage of LM317?
The LM317 needs two external resistors — R1 and R2 — to adjust the output voltage. The output voltage depends on the values of R1 and R2. LM317 is an adjustable voltage regulator that takes an input voltage of 3 – 40V DC and provides a fixed output voltage of 1.25V to 37V DC.
What is Max input voltage?
Common-Mode Input Voltage In general, the absolute maximum common-mode voltage is VEE-0.3V and VCC+0.3V, but for products without a protection element at the VCC side, voltages up to the absolute maximum rated supply voltage (i.e. VEE+36V) can be supplied, regardless of supply voltage.
What is a current booster?
If the output current requirement is as high as 10A, then it is convenient to boost a regulator output current with the help of external circuit. The current boosting can be achieved by using external transistor connected in parallel with regulator IC.
Which connection is used in IC723 to boost the current?
IC723 as a HIGH voltage HIGH Current: An external transistor Q is added in the circuit for high voltage low current regulator to improve its current sourcing capacity. For this circuit the output voltage varies between 7 & 37V. Transistor Q increase the current sourcing capacity thus IL (MAX) is greater than 150mA.