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22” TFT TV Service Manual
11. IC DESCRIPTIONS
LM1117 TDA1308T
LM2576 AN7522N
LM317T PI5V330
TFMS5360 GM6015
ST24LC21 SAA3010T
SST37VF040 AD9883A
TEA5114A MC141585
TEA6415 MC34063
VPC3230D MSP3410G
SDA55XX DS90C385
TDA9885/86 LM1084
11.1. LM1117
11.1.1. 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 bandgap
reference to as-sure output voltage accuracy to within ±1%. The LM1117 series is available in SOT-223,
TO-220, and TO-252 D-PAK packages. A minimum of 10µF tantalum capacitor is required at the output to
improve the transient response and stability.
11.1.2. Features
• Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions
• Space Saving SOT-223 Package
• Current Limiting and Thermal Protection
• Output Current 800mA
• Line Regulation 0.2% (Max)
• Load Regulation 0.4% (Max)
• Temperature Range
LM1117 0°C to 125°C
LM1117I -40°C to 125°C
11.1.3. Applications
• 2.85V Model for SCSI-2 Active Termination
• Post Regulator for Switching DC/DC Converter
• High Efficiency Linear Regulators
• Battery Charger
• Battery Powered Instrumentation
11.1.4. Connection Diagrams
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