Details

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BUY A7840 https://www.utsource.net/itm/p/12606885.html

Parameter	Description	Min	Typ	Max	Unit
VIN	Input Voltage	2.7	-	5.5	V
VOUT	Output Voltage	-	3.3	-	V
IOUT	Output Current	-	1.5	-	A
IQ	Quiescent Current	-	60	-	渭A
Dropout Voltage	Dropout Voltage at 1.5A	-	300	-	mV
PSRR	Power Supply Rejection Ratio @ 1kHz	-	60	-	dB
Thermal Shutdown	Thermal Shutdown Temperature	-	160	-	掳C
Operating Temperature	Operating Temperature Range	-40	-	125	掳C

Instructions for Using the A7840

1. Input Connection:

   • Connect the input voltage (VIN) to the input pin of the A7840. Ensure the input voltage is within the range of 2.7V to 5.5V.

2. Output Connection:

   • Connect the output pin of the A7840 to your load or circuit requiring a stable 3.3V supply. The maximum output current is 1.5A.

3. Ground Connection:

   • Connect the ground (GND) pin to the common ground of your system to ensure proper operation.

4. Capacitors:

   • Place a 1渭F ceramic capacitor close to the input pin to filter out noise and stabilize the input voltage.
   • Place a 1渭F ceramic capacitor close to the output pin to stabilize the output voltage and improve transient response.

5. Thermal Management:

   • Ensure adequate heat dissipation, especially when operating at high output currents. The device has thermal shutdown protection, but it is recommended to use a heatsink if necessary.

6. Power Supply Rejection Ratio (PSRR):

   • The A7840 has a PSRR of 60dB at 1kHz, which helps in filtering out ripple and noise from the input supply.

7. Operating Temperature:

   • The A7840 can operate in temperatures ranging from -40掳C to 125掳C. However, prolonged exposure to high temperatures should be avoided to prevent thermal shutdown and potential damage.

8. Dropout Voltage:

   • The dropout voltage is 300mV at 1.5A. This means the input voltage must be at least 3.6V (3.3V + 0.3V) to maintain regulation at full load.

9. Quiescent Current:

   • The quiescent current is 60渭A, which is relatively low and suitable for battery-powered applications.

10. Storage:

    • Store the A7840 in a dry, cool place away from direct sunlight and extreme temperatures to maintain its performance and reliability.

By following these instructions, you can ensure optimal performance and reliability of the A7840 in your application.

(For reference only)