Details

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BUY SE739 https://www.utsource.net/itm/p/995798.html
3.3-3.8 GHz Front-End Transceiver

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN		2.7		5.5	V
Output Voltage	VOUT			3.3		V
Quiescent Current	IQ	VIN = 5V, IOUT = 0mA		1.0		渭A
Output Current	IOUT	Dropout voltage at 300mA		300		mA
Dropout Voltage	VDROPOUT	IOUT = 300mA		300		mV
Load Regulation		IOUT = 0 to 300mA		0.5		%
Line Regulation		VIN = 2.7V to 5.5V		0.5		%
PSRR		f = 1kHz		65		dB

Instructions for Use:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.7V to 5.5V to avoid damage or improper operation.

2. Output Voltage (VOUT):

   • The output voltage is fixed at 3.3V. No external components are required to set this voltage.

3. Quiescent Current (IQ):

   • The quiescent current is very low, typically 1.0渭A, making it suitable for battery-operated devices.

4. Output Current (IOUT):

   • The device can provide up to 300mA of output current. Ensure that the load does not exceed this limit.

5. Dropout Voltage (VDROPOUT):

   • At full load (300mA), the dropout voltage is typically 300mV. This means the input voltage should be at least 3.6V to maintain regulation at 3.3V output.

6. Load and Line Regulation:

   • Both load and line regulation are specified as 0.5%. This indicates good stability under varying load and input conditions.

7. Power Supply Rejection Ratio (PSRR):

   • With a PSRR of 65dB at 1kHz, the SE739 effectively suppresses ripple and noise from the input supply.

8. Application Considerations:

   • Place the SE739 close to the power source and use adequate PCB layout practices to minimize noise and ensure stable operation.
   • Include appropriate bypass capacitors on both input and output to improve transient response and stability.

9. Handling Precautions:

   • Handle with care to prevent electrostatic discharge (ESD) damage. Use proper ESD protection measures during assembly and handling.

(For reference only)