SOT89-3L Burn in Socket

1. Actual requirements:

1.Package: SOT89 package

2. Number of Pins: 3pin

3. Spacing: 1.5mm

4. Chip type: CMOS voltage stabilizing circuit

5. Test requirements: HAST aging test

2. Chip characteristics: current 100mA, test power 0.5W, input withstand voltage 40V, with both output current limiting protection and over-temperature shutdown protection functions. This chip is used in automotive electronics, smart meters, instrumentation, and industrial control.

3. Requirements analysis: The output voltage of this chip is 4.0V, and the current limit is 300mA; the absolute maximum voltage is -0.3~45V, the output voltage is -0.3~0.3V, and the operating temperature is -40~85°C. The test is mainly a power supply test at 0.5W, 40V. The test environment is 125℃*1000 hours, and the reliability test is completed in the extreme environment. During the test process, the temperature acting on the chip body needs to be accurately controlled, so a copper block is added to the bottom of the chip to assist in heat conduction of the chip.

4. During the production process of the test socket, it is mainly necessary to observe the structure of the chip. When designing the corresponding test socket, the pins, large tolerances, and the heat dissipation design of the bottom copper block need to be considered.