SNVSB54A May 2018 – November 2018 LM5122ZA
PRODUCTION DATA.
Refer to the PDF data sheet for device specific package drawings
The LM5122ZA wide input range synchronous boost controller features all of the functions necessary to implement a highly efficient synchronous boost regulator. The regulator control method is based upon peak-current-mode control. Peak-current-mode control provides inherent line feedforward and ease of loop compensation. This highly integrated controller provides strong high-side and low-side N-channel MOSFET drivers with adaptive dead-time control. The switching frequency is user programmable up to 1 MHz set by a single resistor or synchronized to an external clock. The 180º-shifted clock output of the LM5122ZA enables easy multi-phase configuration.
The control mode of high-side synchronous switch can be configured as either forced PWM (FPWM) or diode-emulation mode. Fault protection features include cycle-by-cycle current limiting, hiccup-mode overload protection, thermal shutdown and remote shutdown capability by pulling down the UVLO pin. The UVLO input enables the controller when the input voltage reaches a user selected threshold, and provides a tiny 9-μA shutdown quiescent current when pulled low. The device is available in a 24-pin HTSSOP package featuring an exposed pad to aid in thermal dissipation.