The LM5122MH/NOPB is a multiphase capable synchronous Boost Controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak current-mode control. current-mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The switching frequency is programmable up to 1MHz. Higher efficiency is achieved by two robust N-channel MOSFET gate drivers with adaptive dead-time control. User-selectable diode emulation mode also enables discontinuous mode operation for improved efficiency at light load conditions. An internal charge pump allows 100% duty cycle for high-side synchronous switch (Bypass operation). A 180° phase shifted clock output enables easy multi-phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.
● Peak current mode control
● Robust 3A Integrated gate drivers
● Adaptive dead-time control
● Optional diode emulation mode
● Programmable cycle-by-cycle current limit
● Hiccup mode overload protection
● Programmable line UVLO
● Programmable soft-start
● Thermal shutdown protection
● Programmable slope compensation
● Programmable skip cycle mode reduces standby power
● Allows external VCC supply
● Inductor DCR current sensing capability
● Multiphase capability
● Green product and no Sb/Br
●Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
