TPS3831G33DQNR TI Supervisory Circuits | 4-X2SON (1x1) | 3.3V, Active-Low Reset

Product Overview

The TPS3831G33DQNR from Texas Instruments is a precision voltage supervisor designed for monitoring 3.3V power supplies. It features an active-low, open-drain reset output with a fixed threshold of 3.07V (typical). The device is offered in a compact 4-pin X2SON package (1mm x 1mm), making it ideal for space-constrained applications. It consumes ultra-low quiescent current of 220nA (typical), extending battery life in portable devices. The reset output remains asserted for a minimum of 120ms after the supply voltage rises above the threshold, ensuring proper system initialization.

Detailed Technical Specifications

Key Features

• Ultra-low power consumption: 220nA typical supply current
• Precision voltage monitoring: 3.07V threshold for 3.3V systems
• Open-drain RESET output (active-low)
• Fixed reset timeout delay: 120ms minimum
• Small footprint: 4-pin X2SON package (1mm x 1mm)
• Wide operating temperature range: -40°C to +125°C
• No external components required

Target Applications

• 5G base station power management: monitors 3.3V rail for baseband processors
• Automotive dashboard: ensures proper reset of infotainment systems
• Portable medical devices: battery-powered monitors requiring low power
• Industrial sensors: wireless sensor nodes with strict power budgets
• IoT modules: low-power edge devices for smart home

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產品概述

TPS3831G33DQNR 是德州儀器（TI）推出的一款精密電壓監控器，專為監控 3.3V 電源軌設計。它具有低電平有效、開漏輸出的復位信號，固定閾值為 3.07V（典型值）。器件採用緊湊的 4 引腳 X2SON 封裝（1mm x 1mm），非常適合空間受限的應用。靜態電流僅 220nA（典型值），延長了便攜設備的電池壽命。當電源電壓上升到閾值以上後，復位輸出至少保持 120ms 的置位時間，確保系統正常初始化。

詳細技術參數

核心特性

• 超低功耗：典型供電電流 220nA
• 精密電壓監控：3.07V 閾值適用於 3.3V 系統
• 開漏 RESET 輸出（低電平有效）
• 固定復位超時延遲：120ms 最小值
• 小尺寸：4 引腳 X2SON 封裝（1mm x 1mm）
• 寬工作溫度範圍：-40°C 至 +125°C
• 無需外部元件

典型應用場景

• 5G 基站電源管理：監控基帶處理器的 3.3V 電源軌
• 汽車儀表板：確保信息娛樂系統正常復位
• 便攜醫療設備：電池供電的監護儀，要求低功耗
• 工業傳感器：無線傳感器節點，功耗預算嚴格
• 物聯網模塊：智能家居的低功耗邊緣設備

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