LP3981IMMX-3.3/NOPB TI LDO Regulator | 8-VSSOP | 3.3V Output, 300mA

Product Overview

The LP3981IMMX-3.3/NOPB is a high-performance, low-dropout (LDO) voltage regulator from Texas Instruments, designed to deliver a fixed 3.3V output with a maximum current of 300mA. Housed in a compact 8-VSSOP package, this device offers excellent line and load regulation, making it ideal for noise-sensitive applications. With a dropout voltage as low as 120mV at full load, it ensures efficient operation even when the input voltage is close to the output. The LP3981 features a low quiescent current of 30µA (typical) and a shutdown mode that reduces current to less than 1µA, extending battery life in portable devices. Its fast transient response and low output noise (30µVrms) make it suitable for powering analog and RF circuits.

Detailed Technical Specifications

Key Features

• Fixed 3.3V output with ±2% accuracy
• Low dropout voltage: 120mV at 300mA
• Low quiescent current: 30µA typical
• Shutdown mode: <1µA
• Low output noise: 30µVrms
• High PSRR: 60dB at 1kHz
• Fast transient response
• Thermal shutdown and current limit protection
• Stable with ceramic capacitors (1µF)
• RoHS compliant and lead-free (NOPB)

Target Applications

• 5G base station power management (e.g., powering RF transceivers)
• Automotive dashboard displays and infotainment systems
• Portable medical devices (e.g., glucose meters, pulse oximeters)
• Industrial sensors and IoT modules
• Battery-powered equipment (e.g., wireless headsets, smartwatches)
• Noise-sensitive analog circuits (e.g., audio codecs, ADC/DAC)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for LP3981IMMX-3.3/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

LP3981IMMX-3.3/NOPB 是德州儀器（TI）推出的一款高性能低壓差線性穩壓器（LDO），提供固定的 3.3V 輸出，最大電流 300mA。採用緊湊的 8-VSSOP 封裝，具有優異的線性和負載調整率，非常適合噪聲敏感型應用。在滿載條件下，壓差電壓低至 120mV，確保在輸入電壓接近輸出時仍能高效運行。LP3981 的靜態電流典型值為 30µA，關斷模式下電流小於 1µA，有助於延長便攜設備的電池壽命。其快速瞬態響應和低輸出噪聲（30µVrms）使其適用於為模擬和射頻電路供電。

詳細技術參數

核心特性

• 固定 3.3V 輸出，精度 ±2%
• 低壓差：120mV @ 300mA
• 低靜態電流：典型 30µA
• 關斷模式：<1µA
• 低輸出噪聲：30µVrms
• 高 PSRR：60dB @ 1kHz
• 快速瞬態響應
• 熱關斷和限流保護
• 可與陶瓷電容（1µF）穩定工作
• 符合 RoHS 且無鉛（NOPB）

典型應用場景

• 5G 基站電源管理（例如為射頻收發器供電）
• 汽車儀表盤顯示和信息娛樂系統
• 便攜醫療設備（例如血糖儀、脈搏血氧儀）
• 工業傳感器和 IoT 模塊
• 電池供電設備（例如無線耳機、智能手錶）
• 噪聲敏感型模擬電路（例如音頻編解碼器、ADC/DAC）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 LP3981IMMX-3.3/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]