Details

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BUY MC33129D https://www.utsource.net/itm/p/12598203.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	6.5	-	40	V
Output Voltage	VOUT	Regulated	-	5.0	-	V
Output Current	IOUT	Continuous	-	1.5	2.5	A
Quiescent Current	IQ	VIN = 12V	-	3	5	mA
Dropout Voltage	VDROPOUT	IOUT = 1.5A	-	2.5	3.5	V
Load Regulation	ΔVOUT/ΔIOUT	IOUT = 10mA to 2.5A	-	0.5	1.0	%
Line Regulation	ΔVOUT/ΔVIN	VIN = 7V to 40V	-	0.1	0.3	%
Ripple Rejection	RR	f = 120Hz	-	70	80	dB
Operating Temperature	Toper	Storage	-40	-	125	°C
Junction Temperature	Tj	Max	-	-	150	°C
Storage Temperature	Tstg	-	-40	-	150	°C

Instructions for Using MC33129D

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 6.5V to 40V.
   • Use appropriate capacitors on the input side to filter out noise and stabilize the input voltage.

2. Output Voltage (VOUT):

   • The output voltage is fixed at 5.0V. No external components are required to set this voltage.

3. Output Current (IOUT):

   • The device can provide up to 2.5A of continuous output current. For optimal performance, ensure the load does not exceed 1.5A continuously.
   • Use heat sinks or other cooling methods if operating near the maximum current to prevent overheating.

4. Quiescent Current (IQ):

   • The quiescent current is typically around 3mA at 12V input. This should be considered when designing low-power systems.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is the minimum difference between the input and output voltages required to maintain regulation. It is typically 2.5V at 1.5A output current.

6. Load Regulation:

   • The load regulation is the change in output voltage due to changes in load current. It is typically 0.5% from 10mA to 2.5A.

7. Line Regulation:

   • The line regulation is the change in output voltage due to changes in input voltage. It is typically 0.1% from 7V to 40V.

8. Ripple Rejection:

   • The ripple rejection is the ability of the regulator to reject input voltage ripple. It is typically 70dB at 120Hz.

9. Operating Temperature (Toper):

   • The device is designed to operate over a temperature range of -40°C to 125°C. Ensure proper thermal management to keep the junction temperature below 150°C.

10. Storage Temperature (Tstg):

    • The device can be stored in temperatures ranging from -40°C to 150°C without damage.

Additional Notes:

• Capacitors:
  • Use a 1μF ceramic capacitor on the input side and a 10μF electrolytic capacitor on the output side to ensure stability and reduce ripple.
• PCB Layout:
  • Keep the input and output capacitors close to the device to minimize inductance and improve transient response.
• Heat Dissipation:
  • If operating at high currents or in high ambient temperatures, use a heatsink or thermal pad to dissipate heat effectively.

(For reference only)