Details

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BUY LTC3406BES5-1.8 https://www.utsource.net/itm/p/8164982.html
New and original

Parameter	Symbol	Min	Typical	Max	Unit
Input Voltage	VIN	2.5	-	5.5	V
Output Voltage	VOUT	-	1.8	-	V
Output Current	IOUT	-	600	-	mA
Switching Frequency	FSW	-	1.2	-	MHz
Quiescent Current	IQ	-	75	-	μA
Shutdown Current	ISD	-	1	-	μA
Efficiency at 3.3V in, 3.3V out, 100mA load	η	-	90	-	%

Instructions for LTC3406BES5-1.8

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.5V to 5.5V.

2. Output Voltage (VOUT):

   • The device is preset to provide a fixed output voltage of 1.8V. No external resistors are required for setting the output voltage.

3. Output Current (IOUT):

   • The maximum continuous output current is up to 600mA. Ensure that the load does not exceed this limit to avoid damaging the device.

4. Switching Frequency (FSW):

   • Operates at a fixed switching frequency of 1.2MHz, which helps in minimizing the size of external components like inductors and capacitors.

5. Quiescent Current (IQ):

   • The quiescent current is typically 75μA, contributing to high efficiency even at low loads.

6. Shutdown Current (ISD):

   • When the shutdown pin is pulled low, the device enters a shutdown mode where the current consumption drops to approximately 1μA.

7. Efficiency:

   • At an input voltage of 3.3V and an output voltage of 3.3V with a 100mA load, the efficiency is around 90%. Optimize the power delivery network to achieve higher efficiencies.

8. Thermal Considerations:

   • Ensure proper thermal management by providing adequate PCB copper area for heat dissipation or using a heatsink if necessary.

9. Component Selection:

   • Choose appropriate inductors and capacitors based on the application requirements to ensure stable operation and optimal performance.

10. Layout Guidelines:

    • Follow recommended layout guidelines provided in the datasheet to minimize noise and parasitic effects, ensuring reliable operation.

(For reference only)