Step-down regulator suited to applications such as automotive always-on systems

Linear Technology have announced the LT8630, a 600mA, 100V input capable synchronous step-down switching regulator. Synchronous rectification delivers efficiency as high as 93% while Burst Mode operation keeps quiescent current under 7µA in no-load standby conditions. Its 3V to 100V input voltage range makes it ideal for 48V automotive systems, dual battery transportation, industrial and 36V to 72V telecom applications. Its internal high efficiency switches can deliver up to 600mA of continuous output current to voltages as low as 0.8V. The device’s Burst Mode operation offers ultralow quiescent current, making it well suited for applications such as automotive always-on systems, which need to extend operating battery life. The device’s design maintains a minimum dropout voltage, enabling it to operate with duty cycles up to 99%. Its variable frequency boundary mode switching topology offers high efficiency over a wide range of input voltages. It’s 20-lead TSSOP package with high voltage lead spacing offers a compact, thermally efficient footprint for high voltage applications. The device utilizes internal top and bottom high efficiency power switches with the necessary boost diode, oscillator, control and logic circuitry integrated into a single die. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 5mVP-P. Special design techniques enable high efficiency over a wide input voltage range. Other features include robust short-circuit protection, a power good flag, output voltage tracking and thermal protection.