Details

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BUY LT3430EFE https://www.utsource.net/itm/p/8164441.html
New and original

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage Range	VIN		2.7		5.5	V
Output Voltage Range	VOUT		0.8		3.3	V
Output Current	IOUT	Continuous Mode		1.2		A
Switching Frequency	fSW			1.2		MHz
Efficiency (Typical)	η	VIN = 5V, VOUT = 3.3V		85		%
Shutdown Current	ISD	VIN = 5V		1		μA
Quiescent Current	IQ	VIN = 5V		2.5		mA
Thermal Shutdown Threshold	TSD			160		°C

Instructions for LT3430EFE:

1. Input Voltage Setup:

   • Ensure the input voltage is within the range of 2.7V to 5.5V.

2. Output Voltage Configuration:

   • Set the output voltage using external resistors according to the formula provided in the datasheet.
   • The output voltage can be set between 0.8V and 3.3V.

3. Output Current Considerations:

   • The device can deliver up to 1.2A continuously. Ensure that the load does not exceed this limit to avoid damage.

4. Switching Frequency:

   • The switching frequency is fixed at 1.2MHz, which helps in minimizing the size of external components.

5. Efficiency Optimization:

   • For optimal efficiency, operate the device under typical conditions where VIN = 5V and VOUT = 3.3V, achieving around 85% efficiency.

6. Shutdown Feature:

   • Utilize the shutdown pin to reduce power consumption. In shutdown mode, the current draw is approximately 1μA.

7. Quiescent Current Management:

   • Be aware that the quiescent current is about 2.5mA when operating normally, impacting overall system efficiency.

8. Thermal Management:

   • Monitor the thermal environment as the device will initiate thermal shutdown at approximately 160°C to protect against overheating.

9. Component Selection:

   • Choose external components like inductors and capacitors carefully to match the switching frequency and desired output characteristics.

10. Layout Considerations:

    • Follow good PCB layout practices to minimize noise and ensure stable operation. Keep high current paths short and wide, and use ground planes effectively.

For detailed specifications and application circuits, refer to the official datasheet of the LT3430EFE.

(For reference only)