Linear Technology's LT8631 is a current-mode, PWM, step-down DC/DC converter with internal synchronous switches that provide current for output loads up to 1 A. The wide input range of 3 V to 100 V makes the LT8631 suitable for regulating power from a wide variety of sources including automotive and industrial systems and 36 V to 72 V telecom supplies. Low ripple Burst Mode operation enables high-efficiency operation down to very-low output currents while keeping the output ripple below 10 mV_P-P. Resistor programmable 100 kHz to 1 MHz frequency range and synchronization capability enable optimization between efficiency and external component size. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up while also providing output tracking. A power good flag signals when the output voltage is within ±7.5% of the regulated output. Under-voltage lockout can be programmed using the EN / UV pin. Shutdown mode reduces the total quiescent current to less than 5 µA. The LT8631 is available in a 20-lead TSSOP package with exposed pad for low thermal resistance and high-voltage lead spacing.