L78 Datasheet Positive voltage regulator ICs Features • Output current up to 1.5 A • Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18; 24 V • Thermal overload protection TO-220TO-220FP • Short circuit protection • Output transition SOA protection • 2 % output voltage tolerance (A version) • Guaranteed in extended temperature range (A version) DPAKD²PAKDescription The L78 series of three-terminal positive regulators is available in TO-220, TO-220FP, D²PAK and DPAK packages and several fixed output voltages, making it useful in a wide range of applications. Maturity status link These regulators can provide local on-card regulation, eliminating the distribution L78 problems associated with single point regulation. Each type embeds internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1 A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents. DS0422 - Rev 38 - February 2025 www.st.com For further information, contact your local STMicroelectronics sales office. Document Outline L78 1 Diagram 2 Pin configuration 3 Maximum ratings 4 Test circuits 5 Electrical characteristics 6 Application information 6.1 Design consideration 7 Typical performance 8 Package information 8.1 TO-220 (dual gauge) package information 8.2 TO-220 (single gauge) package information 8.3 TO-220FP type A package information 8.4 TO-220 (single/dual) packing information 8.5 DPAK package information 8.6 D²PAK (SMD 2L STD-ST) type A package information 8.7 D²PAK (ASE) type B package information 8.8 D²PAK and DPAK packing information 9 Ordering information Revision history Contents List of tables List of figures