Details

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BUY LT1071 https://www.utsource.net/itm/p/228146.html
2.5A High Efficiency Switching Regulators2.5A

Parameter	Description	Min	Typ	Max	Unit
Input Voltage	Operating input voltage range	2.5		40	V
Quiescent Current	Supply current with no load		150		渭A
Output Current	Maximum output current			15	mA
Output Voltage Range	Adjustable output voltage range	1.2		38	V
Dropout Voltage	Minimum input-to-output voltage differential for regulation		1.5		V
Power Dissipation	Maximum power dissipation			650	mW
Junction Temperature	Operating junction temperature range	-40		125	掳C

Instructions for Use:

1. Power Supply Connection:

   • Connect the input voltage to the VIN pin.
   • Ensure the input voltage is within the specified operating range (2.5V to 40V).

2. Output Configuration:

   • For adjustable output, connect a resistor divider between VOUT and ADJ pins.
   • The output voltage can be set from 1.2V up to 38V depending on the resistor values.

3. Ground Connection:

   • Connect the GND pin directly to the system ground to ensure stable operation.

4. Capacitor Requirements:

   • Place a bypass capacitor (typically 0.1渭F) close to the GND and VIN pins to reduce noise and improve transient response.
   • An output capacitor (typically 1渭F) may be used to stabilize the output voltage.

5. Thermal Considerations:

   • Ensure adequate heat sinking if the device is expected to dissipate significant power (above 650mW).
   • Monitor the junction temperature to ensure it stays within the -40掳C to 125掳C range.

6. Load Regulation:

   • The device can supply up to 15mA of output current while maintaining regulation.
   • Check the dropout voltage to ensure the input voltage remains sufficiently above the output voltage.

7. Quiescent Current:

   • The quiescent current is typically 150渭A, which should be considered in low-power applications.

These guidelines help in achieving optimal performance from the LT1071 regulator.

(For reference only)