Details

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BUY TPS5904 https://www.utsource.net/itm/p/12598572.html

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Input Voltage	VIN	2.7	-	5.5	V
Output Voltage Range	VOUT	0.6	-	3.6	V	Adjustable
Output Current	IOUT	-	4	-	A	Continuous
Switching Frequency	fSW	500	-	2200	kHz	Adjustable
Efficiency (Typical)	畏	-	95	-	%	At 3.3V IN, 1.8V OUT, 2A
Quiescent Current	IQ	-	22	-	渭A	Shutdown mode
Shutdown Current	ISD	-	0.1	-	渭A
Enable Input High Voltage	VENH	1.2	-	-	V
Enable Input Low Voltage	VENL	-	-	0.8	V
Thermal Shutdown Threshold	TSD	-	160	-	掳C
Operating Temperature	TOPR	-40	-	125	掳C
Storage Temperature	TSTG	-65	-	150	掳C

Instructions for Use:

1. Input Capacitor Selection:

   • Choose a ceramic capacitor with low ESR and ESL.
   • Recommended value: 10 渭F to 47 渭F.

2. Output Capacitor Selection:

   • Use a ceramic capacitor for stability and low ripple.
   • Recommended value: 10 渭F to 22 渭F.

3. Inductor Selection:

   • Select an inductor based on the desired output current and switching frequency.
   • Recommended inductance range: 1 渭H to 4.7 渭H.

4. Feedback Resistor Network:

   • Set the output voltage using a resistor divider network connected to the FB pin.
   • Use the formula: ( V_ = V_ left(1 + fracright) )
   • Where ( V_ = 0.6V ).

5. Enable Pin:

   • The enable pin can be used to control the on/off state of the regulator.
   • Apply a voltage greater than 1.2V to turn on the device.
   • Apply a voltage less than 0.8V to turn off the device.

6. Thermal Management:

   • Ensure adequate heat dissipation by using a heatsink or PCB copper area.
   • Monitor the thermal shutdown threshold to prevent overheating.

7. Layout Considerations:

   • Keep input and output capacitors close to the IC to minimize parasitic inductance.
   • Use wide and short traces for power and ground connections.
   • Place the inductor close to the IC to reduce noise and improve efficiency.

8. Testing and Validation:

   • Verify the output voltage and current under various load conditions.
   • Measure the efficiency and temperature rise during operation.
   • Check for any audible noise or oscillations in the circuit.

For detailed application notes and further information, refer to the TPS5904 datasheet provided by Texas Instruments.

(For reference only)