Details

---

BUY L4931CD25 https://www.utsource.net/itm/p/12535092.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN		2.9		40	V
Output Voltage	VOUT	Fixed		25		V
Quiescent Current	IQ	VIN = 3V, VOUT = 25V		1.5		mA
Dropout Voltage	VD	IOUT = 1mA, VIN = 26V		0.5		V
Load Regulation		IOUT = 1mA to 2A		0.1		%
Line Regulation		VIN = 4.5V to 40V		0.1		%
Ripple Rejection		f = 120Hz		70		dB
Operating Temperature	TOPR		-40		125	°C

Instructions for L4931CD25:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.9V to 40V. Exceeding this range can damage the device.

2. Output Voltage (VOUT):

   • The output voltage is fixed at 25V. No external components are required for setting the output voltage.

3. Quiescent Current (IQ):

   • The quiescent current is typically 1.5mA under specified conditions. This value helps in calculating power dissipation and battery life in portable applications.

4. Dropout Voltage (VD):

   • The dropout voltage is typically 0.5V at an output current of 1mA and an input voltage of 26V. Ensure that the input voltage is sufficiently higher than the output voltage plus the dropout voltage to maintain regulation.

5. Load Regulation:

   • The load regulation is typically 0.1% over a load current range from 1mA to 2A. This ensures stable output voltage regardless of load changes.

6. Line Regulation:

   • The line regulation is typically 0.1% for an input voltage range from 4.5V to 40V. This ensures that the output voltage remains stable despite variations in input voltage.

7. Ripple Rejection:

   • The ripple rejection is typically 70dB at 120Hz. This reduces the effect of input voltage ripple on the output voltage.

8. Operating Temperature (TOPR):

   • The device operates reliably between -40°C and +125°C. Ensure proper heat sinking if operating near the upper temperature limit.

9. Installation and Handling:

   • Handle with care to avoid static damage.
   • Ensure correct orientation during installation to prevent short circuits or damage.

10. Power Dissipation:

    • Calculate power dissipation using the formula ( P_D = (VIN - VOUT) times IOUT ). Ensure that the device does not exceed its maximum power dissipation rating.

These parameters and instructions provide a comprehensive guide for the use and integration of the L4931CD25 regulator in your design.

(For reference only)