Details

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BUY L4925PD https://www.utsource.net/itm/p/8159610.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN		4.5		40	V
Output Voltage	VOUT			5		V
Switching Frequency	fSW			100		kHz
Quiescent Current	IQ	VIN = 12V		3		mA
Efficiency	η	VIN = 12V, IOUT=1A		85		%
Dropout Voltage	VDROPOUT	IOUT = 1A		1.2		V
Load Regulation		0 to 1A		0.5		%
Line Regulation		VIN from 7V to 40V		0.1		%
Ripple Rejection				60		dB

Instructions for L4925PD

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 4.5V to 40V.
   • Use appropriate input capacitors to stabilize the input voltage.

2. Output Voltage (VOUT):

   • The typical output voltage is set at 5V.
   • Adjust external resistors if a different output voltage is required.

3. Switching Frequency (fSW):

   • Operates typically at 100kHz.
   • External components may be adjusted for frequency compensation.

4. Quiescent Current (IQ):

   • At 12V input, the quiescent current is typically 3mA.
   • Ensure minimal load when in standby to reduce power consumption.

5. Efficiency (η):

   • Achieves up to 85% efficiency with a 12V input and 1A output current.
   • Optimize component selection for higher efficiency.

6. Dropout Voltage (VDROPOUT):

   • Typically 1.2V dropout at 1A output current.
   • Consider this when selecting input voltage to ensure stable operation.

7. Load Regulation:

   • Maintain within 0.5% from no load to full load conditions.
   • Check for stability under varying loads.

8. Line Regulation:

   • Keep within 0.1% as input voltage varies from 7V to 40V.
   • Monitor input voltage fluctuations for consistent performance.

9. Ripple Rejection:

   • Provides 60dB ripple rejection.
   • Use proper filtering techniques to minimize output ripple.

For detailed design considerations and specific application notes, refer to the manufacturer's datasheet or technical documentation.

(For reference only)