Catalog
32V, 300 KHz PWM Synchronous Buck Controller IC
Key Features
• + 4.5V to 32V input range
• + 4mm x 4mm MLF® package
• + 300kHz PWM operation
• + 95% efficiency
• + Output voltage adjustable down to 0.8V
• + 20A output current capability
• + Drives all N-Channel MOSFETs
• + Logic controlled micropower shutdown
• + Cycle-by-cycle current limiting
• + Adjustable undervoltage lockout
• + Frequency foldback overcurrent protection
Description
AI
The MIC2199 is a high power 300kHz synchronous buck DC-to-DC controller. The MIC2199 operates from a wide 4.5V to 32V input and can be programmed for output voltages from 0.8V to 6V. The wide input voltage capability makes the MIC2199 an ideal solution for point-of-load DC-to-DC conversion in 5V, 12V, 24V, and 28V systems. The 300kHz switching frequency allows the use of a small inductor and small output capacitors. The current mode PWM control along with the external COMP pin allows for ease of stability compensation and fast transient response across a wide range of applications. An all N-Channel synchronous architecture and powerful output drivers allow up to 20A of output current capability. For smaller external components, refer to the 500kHz MIC2198. The MIC2199 is available with a junction temperature range from -40°C to 125°C.
