Dual DC-DC switching regulator with independent positive and negative outputs

A dual high-performance DC-DC regulator that generates independently regulated resistor programmable Vpos and Vneg outputs - the Analog Devices ADP5070 is now available from Farnell element14 stock. With an input range of 2.85V to 15V, the ADP5070 supports a wide variety of applications including bipolar amplifiers, CCD bias supply, optical module supply and RF power amplifier bias. The device features an integrated main switch in both regulators enabling an adjustable positive output voltage up to +39 V and a negative output voltage of as little as -39V below input voltage. A fixed internal or resistor programmable soft start timer prevents inrush current at power-up. During shutdown, both regulators completely disconnect the loads from the input supply. The ADP5070 can synchronize with an external oscillator from 1MHz to 2.6MHz, operating at a pin selected 1.2MHz/2.4MHz switching frequency. Both regulators implement programmable slew rate control circuitry for the MOSFET driver stage to reduce electromagnetic interference (EMI). Additional features include over-current protection (OCP), over-voltage protection (OVP), thermal shutdown (TSD) and input under-voltage lockout (UVLO).