Rated at 1A and 2A, respectively, the compact MIC33163/4 and MIC33263/4 modules integrate a synchronous buck converter with an inductor into a QFN package with a footprint of 2.5mm x 3mm and a height of 1.1mm for the 1A devices, and 1.9mm for the 2A variants.
Incorporating Micrel’s proprietary FleaFET™ technology and its HyperLight Load® control architecture, these devices can operate at a switching frequency of up to 4MHz with excellent light- and full-load efficiency up to 88% when supplying a 10mA load, and higher than 93% peak efficiency.
This architecture provides a very fast load-transient response while requiring very little output capacitance: a typical system design incorporating an MIC33x6x module uses few, tiny external components, and the total board footprint is just 4.6mm x 7mm.
At the same time, the MIC3316x and MIC3326x modules produce extremely low levels of output voltage ripple, making them ideal for highly noise-sensitive applications, such as camera modules and mobile communications modules, that also require better power efficiency than offered by an LDO.
The new modules also meet the exacting EN55022 class B EMI standard, which relieves the system designer of concerns over emissions when implementing a switching power supply.
In addition to offering high efficiency and a small form factor, these modules are fully protected against over-current, over-voltage and thermal faults. Additional features include adjustable soft-start for controlling in-rush current, and a Power Good output.
The MIC33163 and MIC33164 are specified for a junction temperature range from -40°C to 125°C, while the MIC33263 and MIC33264 are rated for -40°C to 85°C.
- Wireless communications modules
- Solid-state drives
- Wearable devices
- Camera modules
- Integrated MOSFETs and inductor
- 4MHz PWM operation in continuous mode
- Advanced copper lead-frame design provides superior thermal performance
- Adjustable output voltage range: 0.7V to 5V
- Auto discharge of 180Ω (MIC33164 and MIC33264)
- 0.1μA shutdown current
- 33μA quiescent current