Details

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BUY AN17850A https://www.utsource.net/itm/p/968149.html
Silicon Monolithic Bipolar IC

Parameter	Symbol	Min	Typ	Max	Unit	Description
Supply Voltage	VDD	2.7	-	5.5	V	Operating supply voltage range
Supply Current	IDD	-	1.5	3.0	mA	Quiescent current at typical operating conditions
Output Current	IOUT	-	50	100	mA	Maximum continuous output current
Output Voltage	VOUT	-	3.3	-	V	Regulated output voltage
Dropout Voltage	VDROPOUT	-	0.3	0.5	V	Voltage difference between input and output when fully loaded
Load Regulation	-	-	0.5	1.0	%	Change in output voltage with load
Line Regulation	-	-	0.1	0.5	%	Change in output voltage with input voltage
Ripple Rejection	-	60	70	80	dB	Attenuation of input ripple at the output
Thermal Shutdown	TSD	-	150	170	°C	Temperature at which the device shuts down to prevent damage
Operating Temperature	TOPR	-40	-	125	°C	Ambient temperature range for operation

Instructions for Use

1. Power Supply Connection:

   • Connect the positive terminal of the power supply to the VDD pin.
   • Connect the negative terminal (ground) of the power supply to the GND pin.

2. Output Connection:

   • Connect the load to the VOUT pin.
   • Ensure the load does not exceed the maximum output current of 100 mA.

3. Capacitors:

   • Place a 1 μF ceramic capacitor between VDD and GND as close to the device as possible to filter input noise.
   • Place a 1 μF ceramic capacitor between VOUT and GND to stabilize the output voltage.

4. Thermal Considerations:

   • Ensure adequate heat dissipation if the device is operating near its maximum output current or in high ambient temperatures.
   • The device will automatically shut down if the junction temperature exceeds 150°C to prevent damage.

5. PCB Layout:

   • Use a ground plane to help dissipate heat and reduce noise.
   • Keep traces short and wide to minimize resistance and inductance.

6. Storage and Handling:

   • Store the device in a dry, cool place.
   • Handle with care to avoid static discharge, which can damage the device.

7. Testing:

   • Before connecting the load, measure the output voltage to ensure it is within the expected range.
   • Monitor the temperature and current during operation to ensure the device is functioning correctly.

(For reference only)