Details

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BUY LM1951T https://www.utsource.net/itm/p/12607987.html

Parameter	Symbol	Min	Typ	Max	Unit
Input Voltage	V_IN	4.5	-	40	V
Output Voltage	V_OUT	1.23	-	37	V
Output Current	I_OUT	-	100	150	mA
Quiescent Current	I_Q	-	40	-	渭A
Dropout Voltage	V_DO	-	1.2	-	V
Load Regulation	-	-	0.01	-	%/mA
Line Regulation	-	-	0.005	-	%/V
Temperature Coefficient	-	-	35	-	ppm/掳C
Operating Temperature	T_OP	-40	-	125	掳C
Storage Temperature	T_STG	-65	-	150	掳C
Thermal Resistance (胃JA)	-	-	150	-	掳C/W

Instructions for Use:

1. Input Voltage (V_IN):

   • Ensure the input voltage is within the range of 4.5V to 40V.
   • Avoid exceeding the maximum input voltage to prevent damage to the device.

2. Output Voltage (V_OUT):

   • The output voltage can be adjusted from 1.23V to 37V using external resistors.
   • Use the formula ( V_ = 1.23 left(1 + fracright) ) to set the desired output voltage, where ( R_1 ) and ( R_2 ) are the resistor values.

3. Output Current (I_OUT):

   • The typical output current is 100mA, with a maximum of 150mA.
   • Ensure the load does not exceed the maximum output current to avoid overheating or damage.

4. Quiescent Current (I_Q):

   • The quiescent current is typically 40渭A.
   • This low current draw makes the LM1951T suitable for battery-powered applications.

5. Dropout Voltage (V_DO):

   • The dropout voltage is typically 1.2V.
   • Ensure the input voltage is at least 1.2V higher than the output voltage to maintain regulation.

6. Load Regulation:

   • The load regulation is 0.01% per milliampere.
   • This indicates that the output voltage will change by 0.01% for every 1mA change in load current.

7. Line Regulation:

   • The line regulation is 0.005% per volt.
   • This indicates that the output voltage will change by 0.005% for every 1V change in input voltage.

8. Temperature Coefficient:

   • The temperature coefficient is 35ppm/掳C.
   • This means the output voltage will change by 35 parts per million for every degree Celsius change in temperature.

9. Operating Temperature (T_OP):

   • The operating temperature range is from -40掳C to 125掳C.
   • Ensure the device operates within this range to avoid performance degradation or damage.

10. Storage Temperature (T_STG):

    • The storage temperature range is from -65掳C to 150掳C.
    • Store the device within this range to prevent damage.

11. Thermal Resistance (胃JA):

    • The thermal resistance from junction to ambient is 150掳C/W.
    • Ensure adequate heat dissipation if the device is operated at high power levels or in high-temperature environments.

Additional Notes:

• Always use appropriate decoupling capacitors on the input and output to ensure stability and reduce noise.
• Refer to the datasheet for detailed application circuits and layout guidelines.

(For reference only)