Micrel Builds On High Speed LDO Family for Point-of-Load Applications
Micrel, Inc. launched the MIC47050, a 0.5A high speed, very low dropout regulator ULDO™ with input voltage capability down to 1.0V. The MIC47050 is designed to take advantage of applications that utilize multiple supply rails to generate low voltage, high current power supplies. The device is well suited for point-of-load, DSPs, PLDs, PDAs, FPGAs and low voltage post regulation applications. It is currently available in volume quantities and is priced at $0.62 for 1K quantities in the 2 x 2mm MLF® package.
"Many new point-of-load applications are beginning to use 1.8V as a main input power distribution rail while providing output voltages from 1.25 to 0.5V to power low voltage processor and microcontroller cores," noted Andy Khayat, business unit director of Micrel’s portable products group. "The low Vin capability of Micrel’s new device provides a high efficiency solution for the system designer."
The NMOS output stage of the MIC47050 makes for what is described as a unique ability to respond very quickly to sudden load changes required by a microprocessor, DSP or FPGA. It can source up to 0.5A of output current while only requiring a 1uF ceramic output capacitor for stability. The device offers an operating voltage range of 1.0 to 3.6V input supply, 2.3 to 5.5V bias supply and only 44mV dropout at full load. It comes with a 0.4 to 2.0V output voltage range and a PSRR of > 55dB at 1kHz. The IC also gives designers high output voltage accuracy of +/- 1.5 percent initial accuracy and +/- 2 percent over temperature.
The MIC47050 is housed in a tiny 2 x 2mm MLF package which is ideal for customers with limited board space. The IC features a with an operating junction temperature range of -40 to +125°C.
