ST L4976D013TR

Step-DownБак8V55V1A

Overview

The L4976D013TR is a step down monolithic power switching regulator delivering 1A 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 DMOS transistor (with a typical Rds(ON) of 0.25Ω) 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 40V 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, protection against feedback loop disconnection and thermal shutdown. The device is available in plastic dual in line, MINIDIP 8 for standard assembly, and SO16W for SMD assembly.

Features ■ Up to 1A step down converter ■ Operating input voltage from 8v to 55v ■ Precise 5.1V reference voltage ■ Output voltage adjustable from 0.5V to 50V ■ Switching frequency adjustable up to 300kHz ■ Voltage feedforward ■ Zero load current operation ■ Internal current limiting (pulse-bypulse ■ and hiccup mode) ■ Protection against feedback disconnection ■ Thermal shutdown

Features

Applications

• CNC system
• Servo drive system
• Digital display device
• Linear guide
• Ball screw pair
• Computer application technology
• Network technology
• Automation technology
• CMM
• Various precision measuring instruments