LM21305SQ/NOPB TI DC-DC Converter | 28-WQFN (5x5) | 3A, 1.5MHz

Product Overview

The LM21305SQ/NOPB is a high-efficiency, 3A synchronous step-down DC-DC converter from Texas Instruments. It operates over a wide input voltage range of 2.95V to 5.5V, making it ideal for low-voltage power conversion in space-constrained applications. Housed in a compact 28-pin WQFN (5x5mm) package, it integrates high-side and low-side MOSFETs to minimize external component count and solution size.

Detailed Technical Specifications

Key Features

• Integrated 3A synchronous buck converter with low RDS(on) MOSFETs
• Fixed 1.5MHz switching frequency for small external components
• Internal soft-start and compensation
• Power-good output and enable pin
• Over-current, over-voltage, and thermal shutdown protection
• Low shutdown current (<1µA)

Target Applications

• 5G base station power supplies (e.g., for FPGA or DSP cores)
• Automotive dashboard and infotainment systems
• Industrial control and sensor modules
• Portable and battery-powered devices
• Networking equipment (routers, switches)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for LM21305SQ/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

LM21305SQ/NOPB 是德州儀器推出的高效 3A 同步降壓 DC-DC 轉換器。輸入電壓範圍為 2.95V 至 5.5V，適用於空間受限的低壓電源轉換。採用緊湊的 28 引腳 WQFN（5x5mm）封裝，內部集成高側和低側 MOSFET，減少了外部元件數量和解決方案尺寸。

詳細技術參數

核心特性

• 集成 3A 同步降壓轉換器，低導通電阻 MOSFET
• 固定 1.5MHz 開關頻率，支持小型外部元件
• 內部軟啟動和補償
• 電源正常指示和使能引腳
• 過流、過壓和熱關斷保護
• 低關斷電流（<1µA）

典型應用場景

• 5G 基站電源（例如 FPGA 或 DSP 內核供電）
• 汽車儀表盤和信息娛樂系統
• 工業控制和傳感器模塊
• 便攜式和電池供電設備
• 網絡設備（路由器、交換機）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 LM21305SQ/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]