The KF50BD-TR is a very low drop regulator available in SO-8 package and in a wide range of output voltages. The very low drop voltage (0.4 V) and the very low quiescent current make them particularly suitable for low noise, low power applications and specially in battery powered systems. A shutdown logic control function is available (pin 5, TTL compatible). This means that when the device is used as a local regulator, it is possible to
put a part of the board in standby, decreasing the total power consumption. It requires only a 2.2 µF capacitor for stability allowing space and cost
saving.
STMicroelectronics recommends a 2-layer PCB with a solid ground plane on the bottom layer and a thermal relief pattern on the top layer to ensure optimal thermal performance.
To ensure reliable operation in high-temperature environments, it is recommended to derate the device's power dissipation according to the temperature derating curve provided in the datasheet, and to ensure good thermal conduction to the PCB and heat sink.
STMicroelectronics recommends a soldering profile with a peak temperature of 260°C, a dwell time above 217°C of 60-90 seconds, and a cooling rate of 4°C/s to prevent thermal shock.
To protect the device from ESD, it is recommended to handle the device in an ESD-protected environment, use ESD-protective packaging, and ensure that the device is properly grounded during handling and assembly.
STMicroelectronics recommends storing the device in its original packaging, away from direct sunlight and moisture, and handling the device by the body or leads to prevent damage.
KF50BD-TR datasheet
by STMicroelectronics
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