Details

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BUY L9904 https://www.utsource.net/itm/p/12533333.html

Parameter	Symbol	Min	Typ	Max	Unit	Notes
Supply Voltage	VDD	2.5	-	5.5	V	-
Operating Temperature	TOP	-40	-	125	°C	-
Output Current	IOUT	-	1.5	3.0	A	Continuous output current
Switching Frequency	fSW	-	100	500	kHz	Adjustable switching frequency
Efficiency	η	-	90	-	%	Typical efficiency at nominal conditions
Quiescent Current	IQ	-	10	30	μA	Quiescent current at no load
Shutdown Current	ISD	-	0.1	1.0	μA	Shutdown mode current
Input Voltage Range	VIN	4.5	-	60	V	Input voltage range for buck converter operation
Output Voltage Range	VOUT	0.8	-	37	V	Adjustable output voltage range
Thermal Shutdown	TSD	-	160	-	°C	Thermal shutdown temperature
Protection Features	-	-	-	-	-	Overcurrent, short-circuit, thermal, and undervoltage lockout (UVLO)

Instructions for Using the L9904

1. Supply Voltage (V_DD):

   • Ensure the supply voltage is within the range of 2.5V to 5.5V to avoid damage to the device.

2. Operating Temperature (T_OP):

   • The device can operate between -40°C and 125°C. Ensure the ambient temperature does not exceed these limits.

3. Output Current (I_OUT):

   • The device can provide a continuous output current of up to 3A. For higher currents, consider external components or heat dissipation solutions.

4. Switching Frequency (f_SW):

   • The switching frequency can be adjusted between 100kHz and 500kHz. Use external components to set the desired frequency.

5. Efficiency (η):

   • The typical efficiency is 90%. Ensure proper design and component selection to achieve optimal efficiency.

6. Quiescent Current (I_Q):

   • The quiescent current is typically 10μA. This is important for low-power applications.

7. Shutdown Current (I_SD):

   • In shutdown mode, the current consumption is very low, typically 0.1μA. Use this feature to save power when the device is not in use.

8. Input Voltage Range (V_IN):

   • The input voltage should be between 4.5V and 60V. Ensure the input voltage is stable and within this range to avoid malfunctions.

9. Output Voltage Range (V_OUT):

   • The output voltage can be adjusted between 0.8V and 37V. Use external resistors to set the desired output voltage.

10. Thermal Shutdown (T_SD):

    • The device will shut down if the temperature exceeds 160°C to prevent damage. Ensure adequate cooling for high-power applications.

11. Protection Features:

    • The L9904 includes overcurrent, short-circuit, thermal, and undervoltage lockout (UVLO) protection. These features help ensure reliable operation under various conditions.

Additional Notes:

• Always refer to the datasheet for detailed specifications and application notes.
• Use appropriate PCB layout techniques to minimize noise and improve performance.
• Ensure all external components, such as inductors and capacitors, meet the specified requirements for optimal operation.

(For reference only)