Details

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BUY USD4545C https://www.utsource.net/itm/p/12606951.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	Operating condition	2.7		5.5	V
Output Current	IO	Continuous		1.5		A
Switching Frequency	fSW		300		2000	kHz
Quiescent Current	IQ	VOUT = 3.3V		80		μA
Dropout Voltage	VDROPOUT	IOUT = 500mA		300		mV
Load Regulation		10mA to 500mA		2		%
Line Regulation		2.7V to 5.5V		0.5		%
Enable Input High	VENH		1.2			V
Enable Input Low	VENL				0.4	V
Power Good	VPG		1.1			V

Instructions for USD4545C

1. Supply Voltage (VDD):

   • Ensure the supply voltage is within the range of 2.7V to 5.5V for stable operation.

2. Output Current (IO):

   • The device can provide up to 1.5A continuously. Ensure the load does not exceed this limit to avoid damage.

3. Switching Frequency (fSW):

   • Operates between 300kHz and 2000kHz. Choose external components that are compatible with these frequencies.

4. Quiescent Current (IQ):

   • At a typical value of 80μA when VOUT is set to 3.3V, ensure this is accounted for in power budget calculations.

5. Dropout Voltage (VDROPOUT):

   • With a typical dropout voltage of 300mV at 500mA output current, design your circuit to maintain sufficient headroom above this value.

6. Load Regulation:

   • Expect a typical load regulation of 2% from 10mA to 500mA. This indicates how well the output voltage remains constant under varying load conditions.

7. Line Regulation:

   • With a line regulation of 0.5%, the output voltage stability is maintained over the input voltage range.

8. Enable Input (VENH/VENL):

   • To activate the device, apply a voltage greater than 1.2V to the enable pin. To disable, keep it below 0.4V.

9. Power Good (VPG):

   • The power good signal asserts high when the output voltage is within regulation, typically above 1.1V.

Ensure all connections are secure and follow the manufacturer’s guidelines for optimal performance and safety.

(For reference only)