LM340_16 Datasheet, PDF (1/33 Pages) Texas Instruments – 1.5-A Fixed Voltage Regulators

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LM340, LM340A, LM7805, LM7812, LM7815
SNOSBT0K – FEBRUARY 2000 – REVISED JULY 2016
LM340, LM340A and LM78xx Wide V_IN 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 T_J = 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
• White Goods
SPACE
Available Packages
Pin 1. Input
2. Ground
3. Output
2
Tab/Case is Ground or Output
1
TO-3
231
TO-220
3 Description
The LM340 and LM78xx monolithic 3-terminal
positive voltage regulators employ internal current-
limiting, 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
LM78xx
SOT-23 (4)
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.
123
TO-263
231
SOT-223
Fixed Output Voltage Regulator
*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.