Texas Instruments UCC3585 Low Voltage Synchronous Buck Controller UCC3585N

The UCC3585N is a low voltage synchronous buck controller designed for efficient power conversion with output voltages programmable down to 0.9 V and an input voltage range of 3.0 V to 5.5 V. It features a fixed frequency oscillator capable of PWM operation up to 500 kHz, driving a P-channel high side and an N-channel low side MOSFET for high efficiency, reaching up to 90%. The device includes a programmable two-level current limiting function, which can be configured for pulse-by-pulse limiting, timed shutdown, or latch-off after fault detection, providing flexibility for various applications. Additional features include undervoltage lockout, a logic-compatible enable function, and soft-start capabilities. The UCC3585N is available in 16-pin surface mount and through-hole packages, making it suitable for local microprocessor core voltage supplies, DSP powering, and high-speed bus regulation.