46
LC-39LD145
LC-32LD145
9. I-LM1117/LM 800mA Low-Dropout Linear Regulator
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 assure 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 10F tantalum capacitor is required at the output to
improve the transient response and stability.
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
Applications
n 2.85V Model for SCSI-2 Active Termination
n Post Regulator for Switching DC/DC Converter
n High Efficiency Linear Regulators
n Battery Charger
n Battery Powered Instrumentation
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