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LM1117/LM1117I 800mA Low-Dropout Linear Regulator
April 2006
LM1117/LM1117I 800mA Low-Dropout Linear Regulator
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 assure output voltage accuracy to within ± 1%. The LM1117 series is available in LLP, TO-263, 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.
Features
n Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions n Space Saving SOT-223 and LLP Packages n Current Limiting and Thermal Protection n Output Current 800mA n Line Regulation 0.2% (Max) n Load Regulation 0.4% (Max) n Temperature Range — LM1117 0˚C to 125˚C — LM1117I −40˚C to 125˚C
Applications
n n n n n 2.85V Model for SCSI-2 Active Termination Post Regulator for Switching DC/DC Converter High Efficiency Linear Regulators Battery Charger Battery Powered Instrumentation
Typical Application
Active Terminator for SCSI-2 Bus
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Fixed Output Regulator
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© 2006 National Semiconductor Corporation
DS100919
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LM1117/LM1117I
Ordering Information
Package 3-lead SOT-223 Temperature Range 0˚C to +125˚C Part Number LM1117MPX-ADJ LM1117MPX-1.8 LM1117MPX-2.5 LM1117MPX-2.85 LM1117MPX-3.3 LM1117MPX-5.0 −40˚C to +125˚C LM1117IMPX-ADJ LM1117IMPX-3.3 LM1117IMPX-5.0 3-lead TO-220 0˚C to +125˚C LM1117T-ADJ LM1117T-1.8 LM1117T-2.5 LM1117T-2.85 LM1117T-3.3 LM1117T-5.0 3-lead TO-252 0˚C to +125˚C LM1117DTX-ADJ LM1117DTX-1.8 LM1117DTX-2.5 LM1117DTX-2.85 LM1117DTX-3.3 LM1117DTX-5.0 −40˚C to +125˚C LM1117IDTX-ADJ LM1117IDTX-3.3 LM1117IDTX-5.0 8-lead LLP 0˚C to +125˚C LM1117LDX-ADJ LM1117LDX-1.8 LM1117LDX-2.5 LM1117LDX-2.85 LM1117LDX-3.3 LM1117LDX-5.0 −40˚C to 125˚C LM1117ILDX-ADJ LM1117ILDX-3.3 LM1117ILDX-5.0 TO-263 0˚C to +125˚C LM1117SX-ADJ LM1117SX-2.85 LM1117SX-3.3 LM1117SX-5.0 Packaging Marking N03A N12A N13A N04A N05A N06A N03B N05B N06B LM1117T-ADJ LM1117T-1.8 LM1117T-2.5 LM1117T-2.85 LM1117T-3.3 LM1117T-5.0 LM1117DT-ADJ LM1117DT-1.8 LM1117DT-2.5 LM1117DT-2.85 LM1117DT-3.3 LM1117DT-5.0 LM1117IDT-ADJ LM1117IDT-3.3 LM1117IDT-5.0 1117ADJ 1117-18 1117-25 1117-28 1117-33 1117-50 1117IAD 1117I33 1117I50 LM1117SADJ LM1117S2.85 LM1117S3.3 LM1117S5.0 Transport Media Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Rails Rails Rails Rails Rails Rails Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel TS3B LDC08A TD03B T03B NSC Drawing MP04A
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LM1117/LM1117I
Block Diagram
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Connection Diagrams
SOT-223
TO-263
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Top View
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Top View
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TO-220
Side View LLP
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Top View TO-252
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When using the LLP package Pins 2, 3 & 4 must be connected together and Pins 5, 6 & 7 must be connected together
Top View
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Top View
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LM1117/LM1117I
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Maximum Input Voltage (VIN to GND) Power Dissipation (Note 2) Junction Temperature (TJ) (Note 2) Storage Temperature Range Lead Temperature 20V Internally Limited 150˚C -65˚C to 150˚C
TO-220 (T) Package SOT-223 (IMP) Package ESD Tolerance (Note 3)
260˚C, 10 sec 260˚C, 4 sec 2000V
Operating Ratings (Note 1)
Input Voltage (VIN to GND) Junction Temperature Range (TJ)(Note 2) LM1117 LM1117I 0˚C to 125˚C −40˚C to 125˚C 15V
LM1117 Electrical Characteristics
Typicals and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in Boldface type apply over the entire junction temperature range for operation, 0˚C to 125˚C. Symbol VREF Parameter Reference Voltage Conditions LM1117-ADJ IOUT = 10mA, VIN-VOUT = 2V, TJ = 25˚C 10mA ≤ IOUT ≤ 800mA, 1.4V ≤ VIN-VOUT ≤ 10V LM1117-1.8 IOUT = 10mA, VIN = 3.8V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 3.2V ≤ VIN ≤ 10V LM1117-2.5 IOUT = 10mA, VIN = 4.5V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 3.9V ≤ VIN ≤ 10V LM1117-2.85 IOUT = 10mA, VIN = 4.85V, TJ = 25˚C 0 ≤ IOUT ≤ 800mA, 4.25V ≤ VIN ≤ 10V 0 ≤ IOUT ≤ 500mA, VIN = 4.10V LM1117-3.3 IOUT = 10mA, VIN =5 VT J = 25˚C 0 ≤ IOUT ≤ 800mA, 4.75V≤ VIN ≤ 10V LM1117.