The LM5122 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 1 MHz. Higher efficiency is achieved by two robust N-channel MOSFET gate drivers with adaptive dead-time control. A 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.
● AEC-Q100 Qualified with the following results:
● Device Temperature Grade 1: 40°C to +125°C
●Ambient Operating Temperature Range
● Device HBM ESD Classification Level 2
● Device CDM ESD Classification Level C6
● Maximum Input Voltage : 65 V
● Min Input Voltage : 3 V (4.5 V for startup)
● Output Voltage up to 100 V
● Bypass (VOUT = VIN) Operation
● 1.2 V Reference with ±1.0% Accuracy
● Free-Run and Synchronizable Switching to 1 MHz
● Peak Current Mode Control
● Robust 3 A 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
● Low Shutdown Quiescent Current: 9 µA
● Programmable Slope Compensation
● Programmable Skip Cycle Mode Reduces
●Standby Power
● Allows External VCC Supply
● Inductor DCR Current Sensing Capability
● Multiphase Capability
● Thermally Enhanced 20-Pin HTSSOP
