Integrated FET 75V, 3A Asynchronous Buck Regulator with Internal Compensation and Programmable Frequency

The RAA211835 is a DC/DC asynchronous step-down (Buck) regulator that supports a 4.5V to 75V input voltage range and adjustable output voltage. It can deliver up to continuous 3A of continuous output current with premium load and line regulation performance.

The RAA211835 uses peak-current mode control architecture. Its PWM switching frequency is programmable to provide the best trade-off between transient response and efficiency. It also supports PFM operation to maximize light load efficiency, in addition to an external bias LDO input to further reduce power dissipation across the load range. The regulator also has an internal loop compensation circuit to reduce the external component count and BOM cost.

The RAA211835 provides useful functions such as internal or programmable soft-start and power good indicator. For safe operation, the RAA211835 also offers protection features such as cycle-by-cycle peak and valley current limit, input voltage UVLO, output voltage undervoltage (short-circuit) protection, and thermal shutdown.