The NCP551 series of fixed output low dropout linear regulators are designed for handheld communication equipment and portable battery powered applications which require low quiescent. The NCP551 series features an ultra−low quiescent current of 4.0 A. Each device contains a voltage reference unit, an error amplifier, a PMOS power transistor, resistors for setting output voltage, current limit, and temperature limit protection circuits.

FEATUREs
• Low Quiescent Current of 4.0 μA Typical
• Maximum Operating Voltage of 12 V
• Low Output Voltage Option
• High Accuracy Output Voltage of 2.0%
• Industrial Temperature Range of −40°C to 85°C (NCV551, TA = −40°C to +125°C)
• NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes
• Pb−Free Packages are Available

Typical Applications
• Battery Powered Instruments
• Hand−Held Instruments
• Camcorders and Cameras