Details

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BUY IR3553MPBF https://www.utsource.net/itm/p/8147465.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	4.5		20	V
Output Voltage	VOUT	Adjustable		0.6	5.5	V
Switching Frequency	fSW	Internal Oscillator		600	600	kHz
Quiescent Current	IQ	VOUT = 3.3V, IOUT=0mA		1.8		mA
Efficiency	η	VIN=12V, VOUT=3.3V, IOUT=1A		90		%
Load Regulation		VIN=12V, IOUT=0 to 2A		0.5		%
Line Regulation		IOUT=1A, VIN=5V to 20V		0.1		%
Dropout Voltage	VDROPOUT	IOUT=2A		0.3		V
Thermal Shutdown	TSD			160		°C
Short-Circuit Protection	SCP	Recovery Time		650		μs

Instructions for IR3553MPBF:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 4.5V to 20V for reliable operation.

2. Output Voltage (VOUT):

   • The output voltage can be adjusted between 0.6V and 5.5V using external resistors. Follow the datasheet formula for setting the desired output voltage.

3. Switching Frequency:

   • The device operates at a fixed switching frequency of 600kHz. This parameter is not adjustable.

4. Quiescent Current:

   • The quiescent current is typically 1.8mA under no-load conditions with an output voltage of 3.3V.

5. Efficiency:

   • For optimal efficiency, ensure the input and output voltages and load currents are within specified ranges. Typical efficiency is around 90% at VIN=12V, VOUT=3.3V, and IOUT=1A.

6. Load Regulation:

   • Load regulation is typically 0.5% when the load current changes from 0 to 2A.

7. Line Regulation:

   • Line regulation is typically 0.1% as the input voltage varies from 5V to 20V with a constant load current of 1A.

8. Dropout Voltage:

   • The dropout voltage is typically 0.3V at a load current of 2A.

9. Thermal Shutdown:

   • The device includes thermal shutdown protection that activates at approximately 160°C.

10. Short-Circuit Protection:

    • The device features short-circuit protection with a recovery time of approximately 650μs.

For detailed application circuits and further information, refer to the full datasheet of the IR3553MPBF.

(For reference only)