Details

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BUY LT1031BCH https://www.utsource.net/itm/p/12509346.html

Parameter	Symbol	Min	Typical	Max	Unit
Input Voltage	VIN	2.7	-	40	V
Output Voltage	VOUT	0.5	-	36	V
Output Current	IOUT	-	100	150	mA
Quiescent Current	IQ	-	3.5	5	mA
Dropout Voltage	VDROPOUT	-	1.2	1.8	V
Load Regulation	-	-	0.01	0.1	%
Line Regulation	-	-	0.01	0.1	%
PSRR (Power Supply Rejection Ratio)	-	-	80	90	dB
Operating Temperature	TJ	-40	-	125	°C
Storage Temperature	TSTG	-65	-	150	°C

Instructions for Using LT1031BCH

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.7V to 40V.
   • Use appropriate input filtering and decoupling capacitors to stabilize the input voltage.

2. Output Voltage (VOUT):

   • The output voltage can be set using external resistors. Refer to the datasheet for the specific resistor values needed to achieve the desired output voltage.
   • Ensure the output voltage is within the range of 0.5V to 36V.

3. Output Current (IOUT):

   • The typical output current is 100mA, with a maximum of 150mA.
   • Do not exceed the maximum output current to avoid damage to the device.

4. Quiescent Current (IQ):

   • The quiescent current is typically 3.5mA and should not exceed 5mA.
   • This current is drawn by the regulator even when there is no load on the output.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is the minimum difference between the input and output voltages required to maintain regulation.
   • Ensure the input voltage is at least 1.2V to 1.8V higher than the output voltage to maintain regulation.

6. Load Regulation:

   • The load regulation is the change in output voltage due to changes in load current.
   • Typically, the load regulation is very low, ranging from 0.01% to 0.1%.

7. Line Regulation:

   • The line regulation is the change in output voltage due to changes in input voltage.
   • Typically, the line regulation is very low, ranging from 0.01% to 0.1%.

8. PSRR (Power Supply Rejection Ratio):

   • The PSRR indicates how well the regulator rejects ripple from the input supply.
   • A higher PSRR value (80dB to 90dB) means better rejection of input ripple.

9. Operating Temperature (TJ):

   • The operating temperature range is from -40°C to 125°C.
   • Ensure the device is used within this temperature range to avoid thermal stress and potential failure.

10. Storage Temperature (TSTG):

    • The storage temperature range is from -65°C to 150°C.
    • Store the device in a dry, cool place to prevent damage.

11. PCB Layout:

    • Use a good PCB layout with short leads and wide traces to minimize parasitic inductance and resistance.
    • Place bypass capacitors close to the input and output pins to improve stability and performance.

12. Thermal Management:

    • If operating at high output currents or in high ambient temperatures, consider adding a heatsink to the device to dissipate heat effectively.

13. Capacitor Selection:

    • Use ceramic or tantalum capacitors for input and output bypassing.
    • Ensure the capacitors have low ESR (Equivalent Series Resistance) to improve transient response and stability.

14. Testing and Validation:

    • Test the circuit under various load and input conditions to ensure stable operation.
    • Validate the output voltage and current to meet the design specifications.

By following these guidelines, you can ensure optimal performance and reliability of the LT1031BCH linear regulator in your application.

(For reference only)