Micrel Semiconductor Inc. (San Jose, CA), a leader in power management and high-speed communications integrated circuits, introduced two new power management solutions for portable electronics such as cellular phones, PDAs and MP3 players. The MIC221x family offers high performance, small size and efficient power management for the portable electronics market. It consists of two low-dropout (LDO) regulators, a power-on reset (POR) supervisor and an open-drain driver.
The MIC2213 and MIC2214 offer a dual LDO regulator with an integrated POR supervisor and an open-drain driver. The first regulator (LDO1) is capable of sourcing 150mA of current, while the second regulator (LDO2) can source 300mA and has a POR circuit that detects faults on the output. The MIC2213/4 allows the user to program the delay on the POR to alert the processor when the output of the LDO has reached and settled to its intended voltage. The MIC2213/4 also offers an open-drain, n-channel MOSFET that can be used to drive external LEDs for backlighting applications in portable electronics.
The total current consumption of the MIC2213/4 is only 48µA, compared to existing discrete solutions that consume 200µA. The MIC2213 offers the additional benefit of sequencing between two LDO outputs. LDO1 must reach 90% of its final value prior to LDO2 turning on, ensuring LDO1 is on first.
In 1,000-piece quantities, the MIC2213/4 starts at $0.90 each. Samples are from stock, and production quantities are stock to eight weeks ARO.
