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LM2676SX-3.3

Name: LM2676SX-3.3
Rating: 4.7 (12 reviews)

SWITCHING REGULATOR, CURRENT-MOD

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規格

Supplier	Rochester Electronics, LLC
Package	Bulk
ProductStatus	Active

概述

Description

LM2676SX-3.3 is a fixed-output buck (step-down) regulator from TI’s LM2676 family. It delivers up to 3 A of output current with a wide input range (roughly 4.5–40 V), making it suitable for automotive and industrial apps. The device integrates the high-side switch and requires only a few external components: inductor, a Schottky catch diode, and input/output capacitors. It runs at about 52 kHz, allowing moderately small external components. Efficiency is high (typical in the 80–90% range depending on conditions). Protections include current limit and thermal shutdown to guard against overload. The “SX” suffix indicates a surface-mount package version of the fixed 3.3 V device. Applications include point-of-load supplies, logic rails, and compact DC-DC converters. For exact pinout, package details, and recommended external components, refer to the LM2676SX-3.3 datasheet and reference designs.

Features

Concise features of LM2676SX-3.3:
- 3 A switching regulator with fixed 3.3 V output
- Input voltage range: 4–40 V (max around 40 V)
- Fixed-frequency buck operation (typical ~52 kHz)
- Non-synchronous design with internal switch
- Internal current limit and thermal shutdown protection
- Requires external components: inductor, Schottky catch diode, input/output capacitors
- High efficiency across load range (typical mid to high tens of percent at various conditions)
- Available in surface-mount SMD package (LM2676SX-3.3)
Note: External components and proper heatsinking are needed for reliable operation.

Package

LM2676SX-3.3 is the surface-mount version in an 8-pin SOIC (SOP-8) package.

Pinout

- Pin count: 8 pins (SO-8 / SOP-8 package)
- Function: Fixed‑output 3.3 V, 3 A step‑down (buck) regulator with an integrated switch. Requires external inductor, catch diode, input/output capacitors. Primary pins include VIN (input), GND, SW (switch node), FB (feedback), and EN (enable); other pins are typically not used or ground per package. Exact pinout is in the datasheet.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: TI is a multinational semiconductor company that designs and manufactures analog and embedded-processing integrated circuits, including power-management devices. It is headquartered in Dallas, Texas, USA, and is one of the world’s largest semiconductor producers.

Application

LM2676SX-3.3 is a 3A fixed-output buck regulator. Typical application areas include:
- Automotive: derive 3.3V from 12–40V sources
- Industrial and consumer electronics power supplies
- Embedded systems, microcontrollers, SBCs, networking/telecom gear
- Battery-powered or space-constrained designs needing a high-efficiency 3.3V rail