SI9183 Datasheet, PDF (1/10 Pages) Vishay Siliconix – High-Performance, Size Saving 150-mA CMOS LDO Regulator

Si9183
Vishay Siliconix
High-Performance, Size Saving 150-mA CMOS LDO Regulator
FEATURES
D Low 135-mV Dropout at 150-mA Load
D Guaranteed 150-mA Output Current
D 300-mA Peak Output Current Capability
D Uses Low ESR Ceramic Output Capacitor
D Fast Load And Line Transient Response
D Low Output Noise
D 1-mA Maximum Shutdown Current
D Built-in Short Circuit And Thermal Protection
D Fixed 1.5-V, 1.8-V, 2.0-V, 2.5-V, 2.7-V, 2.8-V, 2.85-V,
3.0-V, 3.3-V, 3.6-V, 5.0-V or Adjustable Output
Voltage Options (Version B)
D Thin SOT-23 5-Pin Package
APPLICATIONS
D Battery Powered Portable Systems
D Cellular Phones
D PDAs, Palmtops
D Pagers
D Post Regulators for Multi-Output Converters
D 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 C_BP 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.
TYPICAL APPLICATIONS CIRCUITS
Si9183-A
V_IN
1 mF
1 V_IN V_OUT 5
2 GND
SD
ON
OFF
3 SD
BP 4
Thin SOT-23, 5-Lead
V_OUT
2.2 mF
0.1 mF
FIGURE 1. Version A with Low Output Noise
V_IN
1 mF
SD
ON
OFF
Si9183-B
1 V_IN V_OUT 5
2 GND
3 SD
FB 4
Thin SOT-23, 5-Lead
V_OUT
2.2 mF
FIGURE 2. Version B with Adjustable Output
Document Number: 71258
S-40593—Rev. E, 29-Mar-04
www.vishay.com
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