Tiny LDO power management ICs provide

Micrel Semiconductor has introduced two new power management solutions for portable electronics such as cellular phones, PDAs and MP3 players.
The MIC221x family offers what's claimed to be the "highest performance, smallest size and most efficient power management solution" for the portable electronics market.
The MIC2213 and MIC2214 offer two low-dropout (LDO) regulators, a power-on-reset (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. Both devices allow the user to program the delay on the POR to alert the processor when the output of the LDO has settled to its intended voltage. This feature enables sequencing and fault detection for the processor's supply voltages. They also offer 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 MIC2213 and MIC2214 is 48uA, compared to existing discrete solutions that consume 200uA. 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.
The MIC2213 and MIC2214 are uCap regulators, stable with small ceramic output capacitors, eliminating the need for larger, less reliable tantalum capacitors. Each device costs US$0.90.
Micrel
Fax 408-944-0970
www.micrel.com
Enter No. 357