The MIC28511, MIC28512 and MIC28513 are offered in both Hyper Speed Control™ and HyperLight Load® architectures: these allow for low output-voltage operation from a high input voltage, and offer very fast response to transient voltages. The HyperLight Load technology also provides very good light-load efficiency, and requires only a small amount of output capacitance.
Considering the MIC2851x devices’ high-voltage capability, they are housed in unusually small 24-pin 3mm x 4mm QFN packages.
Integrating Micrel’s high-voltage buck controller, which has a wide input-voltage range, with its FETZilla™ power MOSFETs and advanced packaging technology, the MIC2851x regulators benefit from outstanding thermal performance. This enables users of the parts to achieve very high power density, saving board space, heat-sink cost and cooling energy.
The regulators’ high-voltage capability is ideal for products which must perform in harsh environments and for applications in which the system is subject to high-voltage spikes or high ambient temperatures. The MIC2851x family can withstand these voltage spikes without compromising efficiency and thermal performance.
The MIC2851x offers an adjustable output voltage as low as 0.8V with a guaranteed accuracy of ±1%. A constant switching frequency can be selected in a range between 200kHz and 680kHz. This allows the designer to choose between a higher frequency for a smaller inductor, or operating at higher efficiency at a lower switching frequency.
- Industrial control systems
- Power metering
- Telecoms equipment
- Medical equipment
- Minimum input voltage range: 4.6V
- Integrated high-side and low-side N-channel MOSFETs
- Built-in 5V regulator for single-supply operation
- Fixed 5ms soft-start
- Internal compensation and thermal shut-down
- Junction temperature range: -40°C to 125°C