LM3549SQX/NOPB TI USB Power Switch | 24-WQFN (4x4) | 2.7-5.5V, 2.5A

Product Overview

The LM3549SQX/NOPB is a high-side N-channel MOSFET power switch from Texas Instruments, designed for USB and general-purpose power distribution applications. It operates over an input voltage range of 2.7V to 5.5V and can deliver up to 2.5A of continuous current. The device features a low on-resistance (typically 70mΩ) to minimize power loss and voltage drop. It includes built-in over-current, over-temperature, and reverse-current protection, making it ideal for robust power management in portable and industrial systems. The compact 24-pin WQFN (4x4mm) package enables space-efficient designs.

Detailed Technical Specifications

Key Features

• Integrated high-side N-channel MOSFET with low RDS(on)
• Over-current protection with auto-retry or latch-off option
• Thermal shutdown protection
• Reverse current blocking when disabled
• Under-voltage lockout (UVLO)
• Fast transient response
• Enable logic compatible with 1.8V/3.3V/5V
• RoHS compliant and lead-free

Target Applications

• USB power distribution in 5G base stations (e.g., powering remote radio units)
• Automotive infotainment and dashboard USB ports
• Portable electronics (smartphones, tablets, laptops)
• Industrial control systems requiring protected power outputs
• Set-top boxes and gaming consoles
• Battery-powered devices with reverse current protection

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for LM3549SQX/NOPB. Our core advantages include:

• 24/7 Global Customer Support: Professional team providing instant quotes and technical support worldwide.
• In-stock Inventory, Same-day Shipping: We maintain localized stock; orders confirmed before 4 PM are shipped the same day.
• HK-SZ Synergy, Flexible Settlement: Direct global shipping from Shenzhen with support for HK bank transfers and multi-currency.
• Escrow Secured Transactions: We support Escrow.com for secure transactions, ensuring peace of mind for batch orders.
• BOM Kitting & Sampling Services: Specialized sourcing for testing samples and urgent shortage components.

Quality Assurance & Compliance

Jasin Chip guarantees that all delivered products are 100% original factory stock with full quality assurance and traceability.

• 100% Original & Authentic: All components are guaranteed to be authentic with strict quality control.
• RoHS Compliant: All electronic components comply with international environmental and safety standards.
• Original Factory Packaging: We maintain original factory packaging and seals to ensure ESD protection and physical integrity.

產品概述

LM3549SQX/NOPB 是德州儀器（TI）的一款高側 N 溝道 MOSFET 電源開關，專為 USB 及通用電源分配應用設計。其輸入電壓範圍為 2.7V 至 5.5V，可提供高達 2.5A 的連續電流。器件具有低導通電阻（典型值 70mΩ），以最小化功率損耗和壓降。內置過流、過溫和反向電流保護，使其非常適合便攜式和工業系統中的穩健電源管理。緊湊的 24 引腳 WQFN（4x4mm）封裝實現了節省空間的設計。

詳細技術參數

核心特性

• 集成高側 N 溝道 MOSFET，低 RDS(on)
• 過流保護，可選自動重試或鎖存關斷
• 熱關斷保護
• 禁用時反向電流阻斷
• 欠壓鎖定（UVLO）
• 快速瞬態響應
• 使能邏輯兼容 1.8V/3.3V/5V
• 符合 RoHS 且無鉛

典型應用場景

• 5G 基站中的 USB 電源分配（例如為遠程無線單元供電）
• 汽車信息娛樂系統和儀表板 USB 端口
• 便攜式電子設備（智能手機、平板電腦、筆記本電腦）
• 需要保護電源輸出的工業控制系統
• 機頂盒和遊戲主機
• 需要反向電流保護的電池供電設備

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 LM3549SQX/NOPB 提供全面的供應鏈與批發解決方案。 我們的核心優勢包括：

• 全天候環球客戶支援：專業團隊為您提供即時報價及技術支援，無需漫長等待。
• 現貨庫存，即日發貨：確保現貨充足。下午 4 點前確認訂單，即可安排當天寄出。
• 深港聯動，結算靈活：深圳直發全球，物流高效可靠；支援香港銀行戶口轉賬及多幣種結算。
• Escrow 擔保交易：支援 Escrow.com 平台交易，保障買賣雙方權益，小批量訂單亦可安心在線下單。
• BOM 配單與樣板服務：提供樣板測試及認證支援。專注一站式 BOM 配套及緊急缺料採購服務。

品質保證與合規

Jasin Chip 承諾所有出貨產品均為原廠正貨，具備完善的品質保證及產品可追溯性。

• 100% 原廠正貨：承諾所有供應零件均為原裝現貨，品質嚴格把關，來源清晰可追溯。
• 符合 RoHS 認證：所有電子元器件均符合國際環保標準及相關安全認證。
• 原廠封裝保護：嚴格保留原廠原始包裝及封條，確保物流過程中的靜電防護 (ESD) 與物理安全。

以上產品均為原廠正貨，提供 BOM 配單及現貨庫存支援，歡迎查詢。

HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
Trusted Partner for Automotive, Industrial, and Hard-to-find Components.
WhatsApp: +852 5209 9691 | Email: [email protected]