Power IC from ADI packs two 1.2 Amp switching regulators and two 300mA LDOs

Analog Devices' new power IC ADP5034 packs two 3-MHz, 1.2-A buck-type switching regulators and two 300-mA LDO (low drop out) regulators in a LFCSP (lead-frame chip-scale) package and also introduced the ADP5024 regulator/LDO, which is identical but features a single 300-mA LDO regulator, which occupies a total board area of 69mm2. This power supply IC is for space starved board with processors and FPGAs.

Analog Devices explains the integrated step-down regulators are used 180 degrees out of phase to reduce input filtering, which allows smaller input capacitors to be used while reducing input noise and a dedicated mode pin places both regulators in forced PWM operation or auto PWM/PSM operation for efficiency. The integrated LDOs feature 65-dB PSRR (power-supply rejection ratio) performance that ranges from 1 kHz to 10 kHz, lowering output noise to 80 µV/rms for powering sensitive analog circuitry.

The ADP5034 and ADP5024 step down regulators/LDOs are used in applications including USB-powered portable devices, handheld medical products and multi-voltage power applications for processors, ASICs, FPGAs and RF chipsets. Each component has dedicated enable pins for each of the step down regulators and LDOs and supports adjustable output voltages on all four regulator outputs, allowing the output voltages to be easily set using an external resistor divider network. The ADP5034 and ADP5024 are fully specified over the junction temperature range of -40 °C to 125 °C.

Available: From August2011
Price per 1kunits:
ADP5024 is $1.24
ADP5034 is $ 1.99
Package: 24-lead 4 mm × 4 mm LFCSP packages