LM21305SQE/NOPB TI DC-DC Converter | 28-WQFN (5x5) | 3A, 4.5V-14V Input

Product Overview

The LM21305SQE/NOPB is a high-performance, synchronous step-down DC-DC converter from Texas Instruments, designed to deliver up to 3A of continuous output current. It operates over a wide input voltage range of 4.5V to 14V, making it suitable for a variety of power supply applications. The device is housed in a compact 28-pin WQFN package (5x5 mm), enabling space-efficient designs. With integrated high-side and low-side MOSFETs, the LM21305 achieves high efficiency and reduces external component count. The switching frequency is adjustable from 200 kHz to 1.5 MHz, allowing optimization between efficiency and solution size. Additional features include soft-start, overcurrent protection, and thermal shutdown.

Detailed Technical Specifications

Key Features

• Integrated 3A synchronous buck converter
• Wide input voltage range: 4.5V to 14V
• Adjustable switching frequency (200 kHz to 1.5 MHz)
• High efficiency up to 95%
• Internal soft-start reduces inrush current
• Overcurrent and thermal protection
• Small 5x5 mm WQFN package

Target Applications

• 5G base station power supplies
• Automotive infotainment and dashboard systems
• Industrial control systems
• Networking equipment (routers, switches)
• FPGA and DSP power rails

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for LM21305SQE/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

LM21305SQE/NOPB 是德州儀器推出的一款高性能同步降壓 DC-DC 轉換器，可提供高達 3A 的連續輸出電流。其輸入電壓範圍為 4.5V 至 14V，適用於多種電源應用。器件採用緊湊的 28 引腳 WQFN 封裝（5x5 mm），有助於節省空間的設計。集成高側和低側 MOSFET，實現高效率並減少外部元件數量。開關頻率可在 200 kHz 至 1.5 MHz 範圍內調節，可在效率與解決方案尺寸之間進行優化。其他功能包括軟啟動、過流保護和熱關斷。

詳細技術參數

核心特性

• 集成 3A 同步降壓轉換器
• 寬輸入電壓範圍：4.5V 至 14V
• 可調開關頻率（200 kHz 至 1.5 MHz）
• 高效率高達 95%
• 內部軟啟動減少浪湧電流
• 過流和熱保護
• 小型 5x5 mm WQFN 封裝

典型應用場景

• 5G 基站電源
• 汽車信息娛樂和儀表板系統
• 工業控制系統
• 網絡設備（路由器、交換機）
• FPGA 和 DSP 電源軌

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 LM21305SQE/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]