L7818ABV

Description：IC REG LINEAR 18V 1.5A TO220
Series：-
Mfr：STMicroelectronics
Package：Tube

SKU:46bcd3ae0ffa Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 18V 1.5A TO220
Series：-
Mfr：STMicroelectronics
Package：Tube
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：35V
Voltage - Output (Min/Fixed)：18V
Voltage - Output (Max)：-
Voltage Dropout (Max)：2V @ 1A (Typ)
Current - Output：1.5A
Current - Quiescent (Iq)：6 mA
Current - Supply (Max)：-
PSRR：59dB (120Hz)
Control Features：-
Protection Features：Over Temperature, Short Circuit
Operating Temperature：-40°C ~ 125°C
Mounting Type：Through Hole
Package / Case：TO-220-3
Supplier Device Package：TO-220
Grade：-
Qualification：-

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L7818ABV

Overview

The L7818ABV is a fixed positive linear voltage regulator manufactured by STMicroelectronics, designed for general-purpose regulation applications. It provides a nominal output voltage of 18V with a maximum continuous output current capability of 1.5A. The device accepts an input voltage range up to a maximum of 35V and features a typical dropout voltage of 2V at 1A load. Internal protection mechanisms include thermal overload shutdown and short-circuit current limiting. The component operates within a temperature range of -40°C to +125°C and is housed in a TO-220 package.

Feature Summary

Fixed positive output voltage regulation
Integrated thermal overload protection
Short-circuit current limiting functionality

Applications

General-purpose power supply circuits
Local regulation for distributed power systems
On-card regulation modules

Procurement Notes

This component is officially classified as obsolete and no longer manufactured by the original producer. Procurement requires verification of availability through authorized distributors or third-party suppliers. Buyers must confirm the authenticity of stock sources and assess the long-term viability of integrating discontinued components into new designs due to potential supply chain constraints.

Selection Notes

Designers should evaluate the thermal dissipation requirements carefully, as the linear topology dissipates excess energy as heat proportional to the voltage differential between input and output. Ensure that the input voltage remains within the specified maximum limit to prevent device damage. Consider alternative active regulators if high efficiency or low dropout voltage is required for the specific application load conditions.

Part Context

The L7818ABV belongs to the L78xx family of three-terminal positive linear regulators produced by STMicroelectronics. This series is widely recognized for its robustness and simplicity in providing stable DC voltages. The 'ABV' suffix typically denotes specific performance grades or packaging variations within the broader L78 product line, adhering to standard industry pinouts for ease of replacement in legacy designs.