The KF25BDT 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.
Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
STMicroelectronics provides a recommended PCB layout in the application note AN5323, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The KF25BDT requires a stable power supply with adequate decoupling capacitors to ensure proper operation. A minimum of 100nF ceramic capacitor should be placed as close as possible to the VDD pin, and additional bulk capacitors can be added to filter out noise and ripple.
The KF25BDT is rated for operation from -40°C to 125°C, but the maximum junction temperature (TJ) should not exceed 150°C. It's essential to ensure proper thermal management, such as using a heat sink or thermal pad, to prevent overheating and ensure reliable operation.
The KF25BDT has a low-power mode that can be enabled by setting the EN pin low. Additionally, the device can be configured for ultra-low power mode by setting the VDDIO pin to 1.8V and using the internal voltage regulator. Refer to the datasheet for specific configuration details.
The KF25BDT can operate at clock frequencies up to 32 kHz, but the recommended frequency is 16 kHz for optimal performance and power consumption. Higher clock frequencies may increase power consumption and reduce the device's overall performance.
KF25BDT datasheet
by STMicroelectronics
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