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Reference Design
LM78L
SNVS754L – JANUARY 2000 – REVISED JUNE 2020
LM78L 100-mA Fixed Output Linear Regulator
1 Features
•1 For lower cost alternative, see the UA78L • Input voltage up to 30 V • Output voltage tolerances of ±5% over the
temperature range • Available output voltages: 5 V, 6.2 V, 8.2 V, 9 V,
12 V, and 15 V • Output current of 100 mA • Output transistor safe area protection • Internal thermal overload protection • Internal short-circuit current limit • No external components • Available in tiny DSBGA package • Available in 3-pin TO-92 and 8-pin SOIC low
profile packages
2 Applications
• Battery chargers • Portable instrumentation • LED lighting • Appliances
Package Options
DSBGA 8-Pin
1 3 2 1
SOIC 8-Pin
TO-92 3-Pin
1 Not to scale
3 Description
The LM78L series (LM78Lxx throughout this document) of three terminal positive regulators is available with several fixed output voltages, making them useful in a wide range of applications. Used as a Zener-diode and resistor combination replacement, the LM78Lxx usually provides an effective output impedance improvement of two orders of magnitude and lower quiescent current. These regulators can provide local, on-card regulation, eliminating distribution problems associated with single-point regulation. The available voltages allow the LM78Lxx to be used in logic systems, instrumentation, HiFi, and other solid-state electronic equipment.
The LM78Lxx is available in the plastic TO-92 (LP) package, the SOIC (D) package, and a chip-sized package (8-Bump DSBGA) using TI's DSBGA package technology. With adequate heat sinking, the regulator can deliver 100-mA output current. Current limiting is included to limit the peak output current to a safe value. Safe area protection for the output transistors is provided to limit internal power dissipation. If internal power dissipation is too high for the heat sinking provided, the thermal shutdown circuit prevents the IC from overheating.
See the AN-1112 DSBGA Wafer Level Chip Scale Package application note for DSBGA considerations. For more information on the TO-92 package, see the TO-92 Packing Options/Ordering Instructions application report.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DSBGA (8)
1.30 mm × 1.30 mm
LM78L
SOIC (8)
3.90 mm × 4.90 mm
TO-92 (3)
3.70 mm × 4.70 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Fixed Output Regulator Circuit
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.
LM78L
SNVS754L – JANUARY 2000 – REVISED JUNE 2020
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Device Comparison Table..................................... 3 6 Pin Configuration and Functions ......................... 4 7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5 7.2 ESD Ratings.............................................................. 5 7.3 Recommended Operating Conditions....................... 5 7.4 Thermal Information .................................................. 5 7.5 Electrical Characteristics — LM78L05 ...................... 6 7.6 Electrical Characteristics — LM78L09 ...................... 6 7.7 Electrical Characteristics — LM78L12 ...................... 7 7.8 Electrical Characteristics — LM78L15 ...................... 7 7.9 Electrical Characteristics — LM78L62 ...................... 8 7.10 Typical Characteristics ............................................ 9 8 Detailed Description ............................................ 11 8.1 Overview ................................................................. 11
8.2 Functional Block Diagram ....................................... 11 8.3 Feature Description................................................. 12 8.4 Device Functional Modes........................................ 12 9 Application and Implementation ........................ 13 9.1 Application Information............................................ 13 9.2 Typical Applications ................................................ 13 10 Power Supply Recommendations ..................... 16 11 Layout................................................................... 16 11.1 Layout Guidelines ................................................. 16 11.2 Layout Example .................................................... 17 12 Device and Documentation.