Allegro MicroSystems developed a hybrid integrated circuit that integrates a non-isolated buck DC-DC converter circuit with an inductor in a single fully molded package. The IC enables designing a power supply circuit with fewer external components. It is ideal for the replacement of a discrete DC-to-DC converter IC, such as a local regulator on various systems, to lower component count, and to save space.
Features
- Fewer external components required: IC operates just by connecting an input smoothing capacitor, an output smoothing capacitor, and output voltage setup resistance.
- Built-in inductor: Built-in power inductor eliminates requirement to evaluate and select the inductor separately.
- Sanken proprietary fully molded and integrated package: The full-mold package allows a screw clamp connection to a heatsink. Depending on an output voltage setup and load conditions, the IC can be operated without a heatsink.
- Wide input voltage range, high efficiency: Input voltage range of 9 VDC to output of 16 to 40 V. When VO = 12 V at 3 A, the efficiency is 91% (typ).
- Various protection functions: Protection functions such as Overcurrent protection (OCP), Overvoltage protection (OVP) and Thermal Shutdown (TSD) are built-in.
- Pins 8 and 9 (SW) are test-only terminals for measuring oscillating frequency. Please leave open for normal operation.
- RFB is the resistance for setting output voltage. Refer to the Setting Output Voltage section.
- C1, C2, C3 recommended values switching mode power supply applications, not for general electronic circuits:
- C1: 50 V / 1000 μF
- C2, C3: 25 V / 1000 μF × 2 units
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Author: EEWeb
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