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-㎂ 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.