Details

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BUY LT3970EMS#PBF https://www.utsource.net/itm/p/8167641.html
New and original

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating Range	2.8	-	5.5	V
Output Voltage	VOUT	Fixed Output	-	3.3	-	V
Output Current	IOUT	Continuous	-	1	-	A
Quiescent Current	IQ	VIN = 5V	-	2	-	μA
Shutdown Current	ISD	VIN = 5V	-	0.1	-	μA
Switching Frequency	FSW	Default Setting	-	2	-	MHz
Efficiency	η	VIN = 5V, IOUT = 1A	-	90	-	%

Instructions for LT3970EMS#PBF

1. Power Supply Connections:

   • Connect the input voltage (VIN) between the VIN pin and GND.
   • Ensure the output capacitor is connected between VOUT and GND to stabilize the output voltage.

2. Enable Pin:

   • The ENABLE pin can be tied to VIN for continuous operation or controlled by an external signal for on/off control.

3. Output Capacitor Selection:

   • Use a ceramic capacitor with low ESR for optimal performance. A typical value is 10μF.

4. Inductor Selection:

   • Choose an inductor based on the desired ripple current and efficiency. A common value is 2.2μH for this device.

5. Thermal Considerations:

   • Ensure adequate PCB copper area around the device for heat dissipation.
   • Avoid placing high-power components too close to the LT3970EMS#PBF.

6. Layout Recommendations:

   • Keep the input and output capacitors as close as possible to the device.
   • Minimize trace lengths for high-frequency nodes like the switch node.

7. Shutdown Mode:

   • Pull the ENABLE pin low to enter shutdown mode, reducing power consumption.

8. Capacitor Selection for Stability:

   • Use capacitors with X7R dielectric type for better temperature stability.

Note: Always refer to the latest datasheet from the manufacturer for detailed specifications and updates.

(For reference only)