LM5122MHE/NOPB

The LM5122MHE/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

Applications

Automotive, Audio, Power Management

Warnings

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.