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16.
17.
LM1117(U175, U180, U181)
16.1
17.1.
General Description
The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current. It
has the same pin-out as National Semiconductor's industry standard LM317. The LM1117 is available in an
adjustable version, which can set the output voltage from 1.25V to 13.8V with only two external resistors. In
addition, it is also available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V. The LM1117 offers
current limiting and thermal shutdown. Its circuit includes a zener trimmed band-gap
reference to as-sure output voltage accuracy to within ±1%. The LM1117 series is available in SOT- 223,
TO-220, and TO-252 D-3$. SDFNDJHV $ PLQLPXP RI ) WDQWDOXP FDSDFLWRU LV UHTXLUHG DW WKH RXWSXW WR
improve the transient response and stability.
16.2
17.2.
Features
x
Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions
x
Space Saving SOT-223 Package
x
Current Limiting and Thermal Protection
x
Output Current 800mA
x
Line Regulation 0.2% (Max)
x
Load Regulation 0.4% (Max)
x
Temperature Range
x
LM1117 0°C to 125°C
x
LM1117I -40°C to 125°C
16.3
17.3.
Applications
x
2.85V Model for SCSI-2 Active Termination
x
Post Regulator for Switching DC/DC Converter
x
High Efficiency Linear Regulators 15
x
32" TFT TV Service Manual 10/01/2005
x
Battery Charger
x
Battery Powered Instrumentation
16.4
17.4.
Absolute Maximum Ratings
16.5
17.5.
Pinning
55
LC-40SH340E
LC-40SH340K
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