The MAX26239/MAX26240 are small, synchronous, buck-boost converters with integrated H-bridge switches. These ICs provide a fixed-output regulation voltage and an externally adjustable output voltage in the 3V to 20V range with an input voltage above, below, or equal to the output regulation voltage. The IC has typical 8.2A and 10A input current-limit options and can support continuous load currents up to 6A depending on the input-to-output voltage ratio and operating frequency. It also has a wide input voltage range of 4.5V to 36V.
The MAX26239/MAX26240 have two switching frequency options: 2.1MHz and 400kHz. The 2.1MHz high switching frequency allows small external components and reduced output ripple and guarantees no AM band interference, while the 400kHz switching frequency offers better efficiency and relieves the power consumption concern. The SYNC input allows three operation modes: skip mode with ultra-low quiescent current, forced fixed-frequency PWM operation, and synchronization to an external clock. The IC also includes spread-spectrum frequency modulation to minimize EMI interference.
The MAX26239/MAX26240 feature a power-OK (POK) indicator, undervoltage lockout, overvoltage protection, cycle-by-cycle current limit, and thermal shutdown. The ICs are available in a small, 4.25mm x 4.25mm x 0.75mm, 22-pin FC2QFN package.
APPLICATIONS
- Point-of-Load Power Supplies
- 12V/24V Industrial Applications
- Telecom, Servers, and Networking Equipment
