FEATURES

 Low 135-mV Dropout at 150-mA Load

 Guaranteed 150-mA Output Current

 300-mA Peak Output Current Capability

 Uses Low ESR Ceramic Output Capacitor

 Fast Load And Line Transient Response

 Low Output Noise

 1-A Maximum Shutdown Current

 Built-in Short Circuit And Thermal Protection

 Fixed 1.8-V, 2.5-V, 2.8-V, 2.85-V, 3.0-V, 3.3-V, 5.0-V

or Adjustable Output Voltage Options (Version B)

 Thin SOT-23 5-Pin Package

APPLICATIONS

 Battery Powered Portable Systems

 Cellular Phones

 PDAs, Palmtops

 Pagers

 Post Regulators for Multi-Output Converters

 Notebook Computers

DESCRIPTION

The Si9183 is a high performance yet size saving 150-mA

CMOS LDO (low dropout) voltage regulator. Its ultra low

ground current and dropout voltage prolong battery life in

portable electronics. The device provides LINE/LOAD

transient response and ripple rejection superior to that of

Bipolar or BiCMOS LDO regulators. It is designed to maintain

regulation while delivering 300-mA peak current. The Si9183

drives lower cost ceramic, as well as tantalum, output

capacitors. Stability is guaranteed from maximum load current

down to 0-mA load. An external noise bypass capacitor

connected to the device’s CBP pin will reduce the LDO’s

self-noise for low noise applications. The Si9183 includes a

shutdown feature that allows users to completely disable the

device and save power when no output is required.

The Si9183, in Thin SOT23-5 packaging, is available in two

versions (Version A or B). Version A offers low noise

performance, while Version B features adjustable output

voltage.

The Si9183 is available in both standard and lead (Pb)-free

packages.