Details

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BUY KA7805CT https://www.utsource.net/itm/p/1532232.html
3-Terminal 1A Positive Voltage Regulator

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VI	Continuous	7	-	35	V
Output Voltage	VO		-	5	-	V
Output Current	IO		-	1	1.5	A
Line Regulation		7V ≤ VI ≤ 35V	-	0.04	-	%
Load Regulation		0mA ≤ IL ≤ 1.5A	-	1	-	%
Dropout Voltage	VD	IO = 1.5A	-	2	-	V
Quiescent Current	IQ		-	5	-	mA
Ripple Rejection		120Hz	-	60	-	dB

Instructions for KA7805CT:

1. Input Voltage (VI):

   • Ensure the input voltage is within the range of 7V to 35V to avoid damage to the regulator or insufficient output voltage.

2. Output Voltage (VO):

   • The KA7805CT provides a stable 5V output voltage. No external components are required for voltage setting.

3. Output Current (IO):

   • The device can supply up to 1.5A of current, but it is typically rated for 1A continuous operation. For higher currents, ensure adequate heat dissipation.

4. Line and Load Regulation:

   • The line regulation is 0.04% over the input voltage range, and the load regulation is 1% over the output current range. This ensures minimal variation in output voltage with changes in input voltage or load.

5. Dropout Voltage (VD):

   • At full load (1.5A), the dropout voltage is around 2V. Keep this in mind when selecting the input voltage to maintain proper regulation.

6. Quiescent Current (IQ):

   • The quiescent current is approximately 5mA. This is the current consumed by the regulator itself, independent of the load.

7. Ripple Rejection:

   • The KA7805CT offers 60dB ripple rejection at 120Hz, which helps in filtering out noise from the input supply.

8. Heat Dissipation:

   • If operating near the maximum output current, consider using a heatsink to prevent overheating. The thermal resistance from junction to ambient should be considered for thermal management.

9. Capacitors:

   • While not strictly necessary, adding capacitors at the input and output can improve transient response and stability. Typical values are 0.33μF and 0.1μF respectively.

10. PCB Layout:

    • Ensure that the PCB layout minimizes inductance and resistance between the input and output terminals. Short, wide traces are recommended for power connections.

(For reference only)