Details

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BUY HY4903B6 https://www.utsource.net/itm/p/8409671.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	Operating condition	2.7	-	5.5	V
Output Current	IOUT	Continuous	-	100	300	mA
Quiescent Current	IQ	VDD = 5V	-	10	20	μA
Shutdown Current	ISD	VSD = 0V	-	0.1	1	μA
Dropout Voltage	VDROPOUT	IOUT = 300mA	-	300	500	mV
Load Regulation	ΔVOUT/ΔIOUT	IOUT = 0 to 300mA	-	0.5	1	%
Line Regulation	ΔVOUT/ΔVIN	VIN = 3 to 6V	-	0.1	0.2	%
Ripple Rejection	RR	1kHz	-	60	70	dB
Operating Temperature	TOPR	-	-40	-	85	°C

Instructions for HY4903B6

1. Power Supply Connection:

   • Connect the input voltage (VIN) between 2.7V and 5.5V to the VDD pin.
   • Ensure a stable power supply to avoid fluctuations that can affect performance.

2. Grounding:

   • Properly connect the ground (GND) pin to the system ground to ensure stable operation.

3. Output Configuration:

   • The output pin (VOUT) should be connected to the load. Ensure the load current does not exceed 300mA continuously.

4. Shutdown Function:

   • To enable shutdown, apply a low signal (0V) to the shutdown pin (SD). This reduces the current consumption to less than 1μA.
   • For normal operation, apply a high signal (VDD) to the SD pin.

5. Capacitors:

   • Place a 1μF capacitor between VDD and GND close to the device to stabilize the input voltage.
   • A 1μF capacitor is also recommended between VOUT and GND to improve transient response and stability.

6. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at higher currents or temperatures to prevent overheating.

7. Operating Environment:

   • Operate within the temperature range of -40°C to +85°C for reliable performance.

8. Handling Precautions:

   • Handle with care to avoid damage from electrostatic discharge (ESD).

For detailed application notes and further specifications, refer to the manufacturer's datasheet.

(For reference only)