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線性與低壓差 (LDO) 穩壓器

TPS7A84A

現行

具有電源良好功能的 3-A、低 VIN (1.1-V)、低雜訊、高準確度、超低壓差電壓穩壓器

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產品規格表

TPS7A84A

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Vin (max) (V) 6.5 Vin (min) (V) 1.1 Iout (max) (A) 3 Output options Adjustable Output, Fixed Output, Programmable Output Vout (max) (V) 5.15 Vout (min) (V) 0.5 Noise (µVrms) 4.4 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 2.8 Features Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Thermal resistance θJA (°C/W) 43.4 Load capacitance (min) (µF) 47 Regulated outputs (#) 1 Accuracy (%) 0.75 Dropout voltage (Vdo) (typ) (mV) 110 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 6.5 Vin (min) (V) 1.1 Iout (max) (A) 3 Output options Adjustable Output, Fixed Output, Programmable Output Vout (max) (V) 5.15 Vout (min) (V) 0.5 Noise (µVrms) 4.4 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 2.8 Features Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Thermal resistance θJA (°C/W) 43.4 Load capacitance (min) (µF) 47 Regulated outputs (#) 1 Accuracy (%) 0.75 Dropout voltage (Vdo) (typ) (mV) 110 Operating temperature range (°C) -40 to 125
VQFN (RGR) 20 12.25 mm² (3.5 mm × 3.5 mm)
  • Low dropout: 180 mV (maximum) at 3 A with BIAS
  • 0.75% (maximum) accuracy over line, load, and temperature with BIAS
  • Output voltage noise: 4.4 µVRMS
  • Input voltage range:
    • Without BIAS: 1.4 V to 6.5 V
    • With BIAS: 1.1 V to 6.5 V
  • TPS7A8400A output voltage range:
    • Adjustable operation: 0.8 V to 5.15 V
    • ANY-OUT™ operation: 0.8 V to 3.95 V
  • TPS7A8401A output voltage range:
    • Adjustable operation: 0.5 V to 5.15 V
    • ANY-OUT™ operation: 0.5 V to 2.075 V
  • Power-supply ripple rejection:
    • 40 dB at 500 kHz
  • Excellent load transient response
  • Adjustable soft-start in-rush control
  • Open-drain power-good (PG) output
  • Low dropout: 180 mV (maximum) at 3 A with BIAS
  • 0.75% (maximum) accuracy over line, load, and temperature with BIAS
  • Output voltage noise: 4.4 µVRMS
  • Input voltage range:
    • Without BIAS: 1.4 V to 6.5 V
    • With BIAS: 1.1 V to 6.5 V
  • TPS7A8400A output voltage range:
    • Adjustable operation: 0.8 V to 5.15 V
    • ANY-OUT™ operation: 0.8 V to 3.95 V
  • TPS7A8401A output voltage range:
    • Adjustable operation: 0.5 V to 5.15 V
    • ANY-OUT™ operation: 0.5 V to 2.075 V
  • Power-supply ripple rejection:
    • 40 dB at 500 kHz
  • Excellent load transient response
  • Adjustable soft-start in-rush control
  • Open-drain power-good (PG) output

The TPS7A84A is a low-noise, low-dropout linear regulator (LDO) capable of sourcing 3 A with only 180-mV of maximum dropout. The device is offered in two output voltage ranges. The TPS7A8400A output voltage is pin-programmable from 0.8 V to 3.95 V, with a 50-mV resolution, and adjustable from 0.8 V to 5.15 V using an external resistor divider. The TPS7A8401A output voltage is pin-programmable from 0.5 V to 2.075 V, with a 25-mV resolution, and adjustable from 0.5 V to 5.15 V using an external resistor divider.

The combination of low-noise, high-PSRR, and high output-current capability makes the TPS7A84A ideal to power noise-sensitive components such as those found in high-speed communications, video, medical, or test and measurement applications. The high performance of the TPS7A84A limits power-supply-generated phase noise and clock jitter, making this device ideal for powering high-performance serializer and deserializer (SerDes), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components. Specifically, RF amplifiers benefit from the high-performance and > 5-V output capability of the device.

For digital loads [such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and digital signal processors (DSPs)] requiring low-input voltage, low-output (LILO) voltage operation, the exceptional accuracy (0.75% over line, load, and temperature), remote sensing, excellent transient performance, and soft-start capabilities of the TPS7A84A ensure optimal system performance.

The versatility of the TPS7A84A makes the device a component of choice for many demanding applications.

The TPS7A84A is a low-noise, low-dropout linear regulator (LDO) capable of sourcing 3 A with only 180-mV of maximum dropout. The device is offered in two output voltage ranges. The TPS7A8400A output voltage is pin-programmable from 0.8 V to 3.95 V, with a 50-mV resolution, and adjustable from 0.8 V to 5.15 V using an external resistor divider. The TPS7A8401A output voltage is pin-programmable from 0.5 V to 2.075 V, with a 25-mV resolution, and adjustable from 0.5 V to 5.15 V using an external resistor divider.

The combination of low-noise, high-PSRR, and high output-current capability makes the TPS7A84A ideal to power noise-sensitive components such as those found in high-speed communications, video, medical, or test and measurement applications. The high performance of the TPS7A84A limits power-supply-generated phase noise and clock jitter, making this device ideal for powering high-performance serializer and deserializer (SerDes), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components. Specifically, RF amplifiers benefit from the high-performance and > 5-V output capability of the device.

For digital loads [such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and digital signal processors (DSPs)] requiring low-input voltage, low-output (LILO) voltage operation, the exceptional accuracy (0.75% over line, load, and temperature), remote sensing, excellent transient performance, and soft-start capabilities of the TPS7A84A ensure optimal system performance.

The versatility of the TPS7A84A makes the device a component of choice for many demanding applications.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 TPS7A84A 3-A, High-Accuracy (0.75%), Low-Noise (4.4-µVRMS) LDO Regulator datasheet (Rev. C) PDF | HTML 2020/12/16
白皮書 Demystifying LDO Turn-On (Start-Up) Time (Rev. B) PDF | HTML 2026/3/10
白皮書 Reduce System Noise Using Parallel LDOs PDF | HTML 2025/11/3
白皮書 Parallel LDO Architecture Design Using Ballast Resistors PDF | HTML 2022/12/14
白皮書 Comprehensive Analysis and Universal Equations for Parallel LDO's Using Ballast PDF | HTML 2022/12/13

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

TPS7A84EVM-753 — TPS7A84 3A 高電流、1% 高準確度、4.4μVRMS LDO 穩壓器評估模組

TPS7A84EVM-753 評估模組為典型配置設計，用於評估 TPS7A84 的運作和性能，其為高電流 3-A 低壓差電壓穩壓器。EVM 電路板主要配置爲參考設計，可供需要高達 3 A 動態負載電流的工程應用。
使用指南: PDF
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模擬型號

TPS7A84 PSpice Transient Model

SBVM575.ZIP (76 KB) - PSpice 模型
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模擬型號

TPS7A84 Unencrypted PSpice Transient Model

SBVM574.ZIP (3 KB) - PSpice 模型
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計算工具

PARALLEL-LDO-CALC — Parallel low-dropout (LDO) calculator

並聯低壓差 (LDO) 計算器是以 Microsoft® Excel® 為基礎的工具，可為使用鎮流器電阻器的並聯 LDO 穩壓器提供最壞情況分析。此工具可幫助使用者判斷所需的並聯 LDO 穩壓器最小數量，以及適合系統要求集的最佳鎮流器電阻。

在並聯應用中使用的常用 LDO 穩壓器的產品規格書資訊會預先填入計算機中。使用者可根據自己的系統需求，評估最符合其系統需求的 LDO 穩壓器裝置。

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參考設計

TIDA-01027 — 在 12.8 GSPS 資料採集系統中發揮最大效能的低雜訊電源供應參考設計

此參考設計展示了一款高效能、低雜訊的五軌電源設計，適用於超高速資料採集 (DAQ) 系統，支援超過 12.8 GSPS。電源供應 DC/DC 轉換器具備頻率同步與相位轉換功能，可將輸入電流漣波降至最低並控制頻率內容。採用高性能 HotRod™ 封裝技術，可將潛在的輻射電磁干擾 (EMI) 降至最低。
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參考設計

TIDA-01232 — 高電流低雜訊並聯 LDO 參考設計

此並聯低壓差 (LDO) 參考設計展示 TPS7A85 低雜訊 LDO 線性穩壓器在並聯配置中的應用，可為每個 LDO 供應 3.5A 電流，或為每塊電路板供應 7A 電流。額外的設計彈性還包括將該設計堆疊以符合應用當前的需求。

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