Details

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Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating	4.5	-	17	V
Output Voltage	VOUT	Adjustable	-	-	-	V
Switching Frequency	fSW	Default	-	280	-	kHz
Output Current	IOUT	Continuous	-	4	-	A
Efficiency	畏	@ 5V IN, 3.3V OUT, 1A	-	90	-	%
Quiescent Current	IQ	Shutdown	-	1.6	-	渭A
Reference Voltage	VREF	Typical	-	0.6	-	V
Soft-Start Time	tSS	Default	-	4.2	-	ms
Thermal Shutdown	TSD	Activation	-	160	-	掳C

Instructions for Using TPS54140ADRCR:

1. Input Capacitor Selection:

   • Choose an input capacitor with low ESR and ESL to ensure stable operation.
   • Recommended ceramic capacitors with X5R or X7R dielectric.

2. Output Capacitor Selection:

   • Select output capacitors based on the desired load transient response.
   • Ceramic capacitors are recommended for their stability and performance.

3. Inductor Selection:

   • Choose an inductor that can handle the peak current without saturating.
   • Ensure the inductance value provides a ripple current suitable for your application.

4. Feedback Network:

   • Set the output voltage using the feedback resistors according to the formula: [ V_ = V_ times (1 + frac) ]

5. Soft-Start Configuration:

   • The soft-start time can be adjusted by connecting a capacitor between the SS/TRK pin and GND.
   • The default soft-start time is approximately 4.2ms.

6. Thermal Considerations:

   • Ensure adequate heat dissipation, especially at high output currents.
   • Place the device on a PCB with thermal vias under the exposed pad for better heat transfer.

7. PCB Layout:

   • Keep the high-current paths short and wide to minimize parasitic inductance.
   • Place the input and output capacitors as close as possible to the device.

8. Enable Function:

   • The EN pin can be used to enable or disable the device.
   • A logic high on this pin enables the regulator, while a logic low disables it.

9. Tracking/Sequencing:

   • Connect the SS/TRK pin to an external voltage source for tracking or sequencing purposes.

10. Protection Features:

    • The device includes overcurrent protection, thermal shutdown, and undervoltage lockout to protect against fault conditions.

For detailed design considerations and specific applications, refer to the datasheet provided by Texas Instruments.

(For reference only)