Details

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BUY TPS54140DGQ https://www.utsource.net/itm/p/5304334.html
1.5-A, 42V STEP DOWN SWIFT? DC/DC CONVERTER WITH ECO-MODE?

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating	4.5		17	V
Output Voltage	VOUT	Adjustable		0.8	5.5	V
Switching Frequency	fSW			2.2		MHz
Quiescent Current	IQ	VOUT = 3.3V		0.9		mA
Efficiency	η	VIN = 12V, IOUT = 1A		90		%
Load Regulation		VIN = 12V, IOUT = 0 to 3A		±1		%
Line Regulation		IOUT = 1A, VIN = 4.5 to 17V		±1		%
Thermal Shutdown	TSD			160		°C
Protection Features		Overcurrent, Overtemperature, Undervoltage Lockout		Yes

Instructions for Using the TPS54140DGQ

1. Input Voltage Connection:

   • Connect the input voltage (VIN) between 4.5V and 17V to the VIN pin of the TPS54140DGQ.

2. Output Voltage Configuration:

   • Set the desired output voltage using external resistors connected to the FB (Feedback) pin. The formula for calculating the output voltage is: [ V_ = V_ left(1 + fracright) ] where ( V_ = 0.8V ).

3. Switching Frequency Adjustment:

   • The switching frequency can be adjusted by connecting a resistor between the RT/CLK pin and ground. For a typical frequency of 2.2MHz, use a standard resistor value as specified in the datasheet.

4. Quiescent Current Consideration:

   • Ensure that the quiescent current remains below 0.9mA when operating at an output voltage of 3.3V to maintain efficiency.

5. Efficiency Optimization:

   • For optimal efficiency, operate within the recommended conditions, especially with input voltages around 12V and load currents up to 1A.

6. Thermal Management:

   • Monitor the thermal shutdown threshold of 160°C to prevent overheating. Ensure adequate heat dissipation through proper PCB layout and possibly additional heatsinks.

7. Protection Features:

   • The device includes built-in overcurrent, overtemperature, and undervoltage lockout protections. Ensure these features are not triggered under normal operation by adhering to the specified operating conditions.

8. Application Circuit Setup:

   • Refer to the typical application circuit diagram provided in the datasheet for detailed connections and component values.

Note: Always refer to the official Texas Instruments datasheet for the most accurate and detailed specifications and guidelines.

(For reference only)