Summary of DC/DC buck power modules fit tight spaces
Micrel's low-profile step-down power modules integrate a synchronous buck regulator and inductor in compact QFN packages, delivering 1-A (MIC33163/33164) or 2-A (MIC33263/33264) output, 100% duty cycle, and 2.7–5.5 V input. Using FleaFET technology and HyperLight Load control, they operate up to 4 MHz with fast transient response, minimizing output capacitance and total board area to 4.6×7 mm, achieving up to 88% efficiency at 10 mA and up to 93% peak efficiency.
Parts used in the Micrel step-down power module project:
- MIC33163 (1-A synchronous buck power module, 2.5×3×1.1 mm QFN)
- MIC33164 (1-A synchronous buck power module, 2.5×3×1.1 mm QFN)
- MIC33263 (2-A synchronous buck power module, 2.5×3×1.9 mm QFN)
- MIC33264 (2-A synchronous buck power module, 2.5×3×1.9 mm QFN)
- Integrated inductor (inside QFN modules)
- FleaFET technology (integrated MOSFETs)
- HyperLight Load control architecture (integrated control)
Micrel’s family of low-profile step-down power modules integrates a synchronous buck regulator with an inductor into a 2.5×3×1.1-mm QFN package for the 1-A MIC33163/33164 and a 2.5×3×1.9-mm QFN package for the 2-A MIC33263/33264 . The modules offer 100% duty cycle operation and accommodate an input voltage range of 2.7 V to 5.5 V.
Incorporating Micrel’s FleaFET tech
nology and HyperLight Load control architecture, the devices can operate up to 4 MHz with up to 88% efficiency at 10 mA and up to 93% peak efficiency. This architecture also provides fast transient response that minimizes output capacitance, thereby reducing total board space to just 4.6×7 mm.
For more detail: DC/DC buck power modules fit tight spaces
- What output currents are available for these Micrel power modules?
They are available as 1-A devices (MIC33163/33164) and 2-A devices (MIC33263/33264). - What are the package dimensions for the 1-A and 2-A modules?
The 1-A modules use a 2.5×3×1.1 mm QFN package; the 2-A modules use a 2.5×3×1.9 mm QFN package. - What input voltage range do the modules support?
The modules accommodate an input voltage range of 2.7 V to 5.5 V. - Can these modules operate at 100% duty cycle?
Yes, the modules offer 100% duty cycle operation. - What switching frequency can these modules reach?
They can operate up to 4 MHz. - What efficiency can be expected at light load and peak?
They provide up to 88% efficiency at 10 mA and up to 93% peak efficiency. - How do these modules reduce board space?
Fast transient response minimizes output capacitance, and integration of the regulator and inductor reduces total board space to about 4.6×7 mm. - What technologies are incorporated in these modules?
They incorporate FleaFET technology and HyperLight Load control architecture.
