Low Input Voltage Dual LDO Family for High-Efficiency Applications
Portable Design News, Thursday August 07, 2008
Micrel Inc. has launched the MIC5313/4/5/6, a new family of low input voltage capable, low dropout regulators. The MIC5313/4/5/6 family integrates two LDOs capable of operating from an input voltage as low as 1.7V, while consuming only 37 μA total quiescent current.
The MIC531x family is designed with very low dropout voltage in order to regulate from low voltage rails and provide the highest conversion efficiency possible. Each one of the dual regulator can supply up to 300mA of output current, while only consuming 37uA total quiescent current when both channels are enabled. The combination of low quiescent, low input voltage capability and low quiescent current allow the MIC531x family to be used in demanding applications that need to be powered up at all times. 
The MIC5313/4/5/6 product family allows use of very small ceramic output capacitors, which reduces required board space and component cost. The product family is available in fixed output voltages. In addition, this family offers high PSRR, POR, voltage scaling, fast turn-on time, current limit and thermal shutdown protection, and can operate from -40˚C to 125˚C. The MIC5313/15 is offered in a 2 mm x 2 mm Thin MLF 10-lead, and the full featured MIC5314/16 is offered in a 2.5 mm x. 2.5 mm Thin MLF 12-lead package.
The MIC5313/4/5/6 are all currently available in volume, with pricing starting at $1.29 for 1K quantities.
Micrel, Inc., San Jose, CA (408) 944-0800 [www.micrel.com]
