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LM340, LM340A, LM7805, LM7812, LM7815
SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016
LM340, LM340A and LM7805 Family Wide VIN 1.5-A Fixed Voltage Regulators
1 Features
•1 Output Current up to 1.5 A • Available in Fixed 5-V, 12-V, and 15-V Options • Output Voltage Tolerances of ±2% at TJ = 25°C
(LM340A) • Line Regulation of 0.01% / V of at 1-A Load
(LM340A) • Load Regulation of 0.3% / A (LM340A) • Internal Thermal Overload, Short-Circuit and SOA
Protection • Available in Space-Saving SOT-223 Package • Output Capacitance Not Required for Stability
2 Applications
• Industrial Power Supplies • SMPS Post Regulation • HVAC Systems • AC Inventors • Test and Measurement Equipment • Brushed and Brushless DC Motor Drivers • Solar Energy String Invertors
SPACE
Available Packages
Pin 1. Input 2. Ground 3. Output Tab/Case is Ground or Output
2 1
TO-3
123
TO-220
3 Description
The LM340 and LM7805 Family monolithic 3-terminal positive voltage regulators employ internal currentlimiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.5-A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.
Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply.
LM7805 is also available in a higher accuracy and better performance version (LM340A). Refer to LM340A specifications in the LM340A Electrical Characterisitcs table.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DDPAK/TO-263 (3) 10.18 mm × 8.41 mm
LM340x
SOT-223 (4)
LM7805 Family TO-220 (3)
6.50 mm × 3.50 mm 14.986 mm × 10.16 mm
TO-3 (2)
38.94 mm x 25.40 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Fixed Output Voltage Regulator
123
TO-263
123
SOT-223
*Required if the regulator is located far from the power supply filter. **Although no output capacitor is needed for stability, it does help transient response. (If needed, use 0.1-μF, ceramic disc).
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
LM340, LM340A, LM7805, LM7812, LM7815
SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 3 6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4 6.2 ESD Ratings.............................................................. 4 6.3 Recommended Operating Conditions....................... 4 6.4 Thermal Information .................................................. 4 6.5 LM340A Electrical Characteristics, VO = 5 V, VI = 10 V............................................................ 5 6.6 LM340 / LM7805 Electrical Characteristics, VO = 5 V, VI = 10 V............................................................ 6 6.7 LM340 / LM7812 Electrical Characteristics, VO = 12 V, VI = 19 V.......................................................... 7 6.8 LM340 / LM7815 Electrical Characteristics, VO = 15 V, VI = 23 V.......................................................... 8 6.9 Typical Characteristics .............................................. 9
7 Detailed Description ............................................ 12 7.1 Overview ................................................................. 12 7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 12 7.4 Device Functional Modes........................................ 12 8 Application and Implementation ........................ 13 8.1 Application Information............................................ 13 8.2 Typical Applications ................................................ 14 8.3 System Examples ........................