SC1454

POWER MANAGEMENT Description The SC1454 contains two ultra low dropout voltage regulators (ULDOs). It operates from an input voltage range of 2.25V to 6.5V, and a wide variety of output voltage options are available. One ULDO has a fixed output, and the other is either fixed (SETA pin grounded) or adjustable using external resistors. Each ULDO has an independent enable pin. Dual 150mA Ultra Low Dropout, Low Noise Regulator Features Up to 150mA per regulator output Low quiescent current Low dropout voltage Stable operation with ceramic caps Very low 50µVRMS output noise Wide selection of output voltages Tight load and line regulation Current and thermal limiting Reverse input polarity protection <1.5uA off-mode current Logic controlled enable SC1454 Designed specifically for battery operated systems, the devices utilize CMOS technology to require very low operating currents (typically 130µA with both outputs supplying 150mA). In addition, the dropout voltage is typically 155mV at 150mA, helping to prolong battery life further. The devices are designed to provide 400mA of peak current for applications which require high initial inrush current. They have been designed to be used with low ESR ceramic capacitors to save cost and PCB area. The SC1454 is available with a wide variety of voltage options as standard. It comes in the tiny 8 lead MSOP surface mount package. u u u u u u u The SC1454 has a bypass pin to enable the user to u capacitively decouple the bandgap reference ...