ST L4978

降压降压8V55V2A

Overview

The L4978 is a step down monolithic power switching regulator delivering 2A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25?) to obtain very high efficency and high switching speed.

A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed). A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications. Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown. The device is available in plastic dual in line, DIP-8 for standard assembly, and SO16W for SMD assembly.

Features

Tube Package
1 outputs
8 pins
Operating supply voltage of 55V

Through Hole Mounting Type

Applications

There are a lot of STMicroelectronics
L4978 Voltage Regulators applications.

• Various precision measuring instruments
• Various precision measuring detectors
• Flaw detection equipment
• Balance equipment
• Industrial robots
• Industrial controllers
• Die casting equipment
• Injection molding machinery
• Various CNC machine tools
• Machining centers