Details

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BUY LTC1735IF#PBF https://www.utsource.net/itm/p/7656067.html
Buck Regulator Positive Output Step-Down DC-DC Controller IC 20-TSSOP

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	2.7	-	5.5	V
Output Voltage	VOUT	Adjustable	-	-	-	V
Output Current	IOUT	Continuous	-	1.5	3	A
Switching Frequency	FSW	Default setting	-	1.0	-	MHz
Quiescent Current	IQ	VOUT = 3.3V	-	4	-	mA
Shutdown Current	ISD	VSHDN = 0V	-	1	-	μA
Efficiency	η	At full load	-	90	-	%

Instructions for LTC1735IF#PBF

1. Power Supply Connection:

   • Connect the input voltage (VIN) to a supply between 2.7V and 5.5V.
   • Ensure proper bypassing with a ceramic capacitor close to the VIN pin.

2. Output Configuration:

   • The output voltage (VOUT) is adjustable. Use external resistors to set the desired output voltage according to the datasheet formula.

3. Switching Frequency Setup:

   • The default switching frequency is 1MHz. Adjust if necessary by modifying the external components as per application requirements.

4. Thermal Considerations:

   • Ensure adequate heat dissipation for operation at higher output currents.
   • Place the device on a PCB with sufficient copper area or use a heatsink if required.

5. Quiescent and Shutdown Modes:

   • The quiescent current is minimized to ensure efficient operation even at low loads.
   • To enter shutdown mode, pull the VSHDN pin low; this reduces the supply current to approximately 1μA.

6. Efficiency Optimization:

   • For optimal efficiency, operate within the recommended operating conditions and choose external components that minimize losses.

7. Component Selection:

   • Select inductors and capacitors based on the intended output current and ripple specifications.

8. Layout Recommendations:

   • Follow good PCB layout practices to minimize noise and parasitic effects.
   • Keep high current paths short and direct.

Note: Detailed component values and specific design considerations should be derived from the official Linear Technology/LTC datasheet for the LTC1735IF#PBF.

(For reference only)