Texas Instruments 5V 1A Step-Down Switching Regulator SOIC-8

The Texas Instruments 5V 1A Step-Down Switching Regulator delivers a stable 5V output from a wider input voltage range in a compact SOIC-8 package. It is a highly efficient step-down (buck) voltage regulator designed for simplicity and reliability, making it a suitable choice for a variety of power management applications.

Overview

This device is a SIMPLE SWITCHER step-down voltage regulator that integrates all the necessary active functions into a single package. Its low external component count, requiring only five additional parts, simplifies design and reduces board space. The regulator operates at a switching frequency of 260 kHz, which allows the use of smaller filter components compared with lower-frequency alternatives.

Performance

The regulator offers line and load regulation and is capable of driving a 1A load with consistent performance. It uses a fixed-frequency oscillator and internal frequency compensation to support stable operation under varying conditions. The specified output voltage tolerance is ±1.5% across specified input and load conditions.

Key Features

• High efficiency and integration: combines a 0.25Ω DMOS output switch with control logic in a single package.
• Protection: includes thermal shutdown and current limit protection to safeguard the device under fault conditions.
• Control: offers TTL-compatible shutdown capability and a low-power standby mode.
• Output accuracy: ±1.5% output voltage tolerance across specified input and load conditions.
• Materials: manufactured without antimony or bromine.

Physical Details

Product weight is 0.153 g. Dimensions as supplied are 3.3 (width), 1.5 (depth) and 4.3 (height).

Design Support

Texas Instruments provides version 6.0 computer design software to assist with rapid development and optimisation of the power supply circuit. The regulator is designed to use readily available standard inductors, which eases sourcing and prototyping.