New step down converter improves efficiency claims Toshiba

The new TC7750FTG programmable voltage regulator combines a PWM driver and FETs with controller and feedback loop in a single, compact package. Offering communication with a host controller via the PMBus, the POLA-compliant has been designed to allow designers to implement advanced diagnostics and protection features and improved power management functions. Toshiba says that PMBus communication can also simplify product development by allowing key parameters to be set via a pc rather than changing external components. The feature is said to provide automatic performance optimisation to take account of temperature, load regulation, voltage changes and other environmental variations during product operation. The device will work with a 2.7 - 5.5V input range and can operate at three switching frequencies: 750kHz, 1.5MHz and 3MHz. Maximum output current is rated at 3.0A, and output voltages range from 0.6V to V_IN - 0.3V. Because it is an integrated solution requiring few external components, Toshiba claims that board space and current consumption are lower than discrete alternatives. Monitoring functions offered by the new Toshiba digital regulator include programmable under and over output voltage detection; programmable average output current detection; programmable over temperature detection; and programmable under input voltage detection. Thermal shut down and overcurrent shutdown protection is also built in to the device. The TC7750FTG is supplied in a QFN28 package measuring 4 x 4mm.