KA7905 DATASHEET PDF

KA A 1 Amp -5V Voltage Regulator. Part Number: KA Price: $ available for immediate number: KA Full datasheet: KA KA 3-Terminal 1A Negative Voltage Regulator. Features. Output Current in Excess of 1A Output Voltages of V Internal Thermal Overload Protection. KA ON Semiconductor / Fairchild Linear Voltage Regulators REGULATOR, – 5V, A, 4% datasheet, inventory & pricing.

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However, the fault does not occur for commonly used input voltages.

Since the stabilizers are used more often, several other parts are shown in the graph as well. Current consumptions of both stabilizers, with and without a load.

We believe that the entire problem is caused by inadequate values of resistors between the input and the output.

KA (Fairchild) – 3-Terminal 1A Negative Voltage Regulator, Negative

Unfortunately, we could not get a sample to measure. The negative voltage was used to power operational amplifiers on a second board as well. Values listed below were measured daasheet a nF capacitor. However, components by other manufacturers behave differently. Here, minimum load current is specified: Conclusion is, that oscillations are not the cause of our overvoltage problem.

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Again, there was V. This is probably the cause of the problem.

KA7905 Datasheet

May – 0: The comparison is only an example what a developer can buy in an electronics components store. Ak7905, they do clearly state that the output voltage is guaranteed in a certain load current range; however, there is NO warning, that a voltage four times higher than the nominal output can appear at the output pin.

The company says, that they make compatible parts. As a supply, we have used a BS DC power supply and a transformer with one-way rectifier.

The ST company can argue that this is possible; however, that the voltage from The ST stabilizer is clearly distinct. If ST really does use such an internal structure, the problem is most likely caused by unsuitable values of resistors around the 6. So, keep this possibility in mind when designing your own applications. The rest of this article analyses the fact, kq7905 Values datssheet were measured for a single sample; other samples as well as stabilizers by other manufacturers behaved similarly.

Consumption no load Consumption 1k load LCV. Of course, the output voltage may fluctuate; however, it can’t be four times the nominal output voltage.

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Voltage regulators (stabilizers) 78xx and 79xx

Input voltage 26V DC. For comparison, input current of a positive voltage stabilizer is mentioned, too. Consumption no load Consumption 1k load LCV 1.

Again, we do apologize to GM Electronic for releasing this information. A similar internal schematic is there; however, the values of the components are legible.

The comparison in this article is not totally objective. At the very end ofthe Czech subsidiary of ST has informed us that information about this behavior will be included in a future update of the respective datasheeg. We do our own development, too, and we do understand that it is not that easy to design and document something. The marginal current 4mA corresponds to a 2k load. Stabilizers by ST differ, beginning from a certain voltage.

Recommended operating datasheeh is shown.

The fault is datashee caused by ST, the manufacturer. So, we examined the datasheets more closely. This is true, BUT: Otherwise, their input voltage decreased by about 8V appears right at the output.