首頁 電源管理 線性與低壓差 (LDO) 穩壓器
首頁
電源管理
線性與低壓差 (LDO) 穩壓器

LP2981

現行

具啟用功能的 100-mA、16-V、低壓差電壓穩壓器

立即訂購
產品規格表

LP2981

現行
立即訂購

產品詳細資料

Rating Catalog Vin (max) (V) 16 Vin (min) (V) 2.2 Iout (max) (A) 0.1 Output options Fixed Output Vout (max) (V) 5 Vout (min) (V) 2.8 Fixed output options (V) 1.8, 2.5, 2.8, 2.9, 3, 3.3, 3.6, 5 Noise (µVrms) 160 PSRR at 100 KHz (dB) 41 Iq (typ) (mA) 0.065 Features Enable Thermal resistance θJA (°C/W) 205 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Accuracy (%) 6 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 16 Vin (min) (V) 2.2 Iout (max) (A) 0.1 Output options Fixed Output Vout (max) (V) 5 Vout (min) (V) 2.8 Fixed output options (V) 1.8, 2.5, 2.8, 2.9, 3, 3.3, 3.6, 5 Noise (µVrms) 160 PSRR at 100 KHz (dB) 41 Iq (typ) (mA) 0.065 Features Enable Thermal resistance θJA (°C/W) 205 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Accuracy (%) 6 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm)
  • Input voltage (VIN) range:
    • Legacy chip: 2.2V to 16V
    • New chip: 2.5V to 16V
  • Output voltage (VOUT) range: 1.2V to 5.0V
  • Output voltage (VOUT) accuracy:
    • ±0.75% for A-grade legacy chip
    • ±1.25% for standard-grade legacy chip
    • ±0.5% for new chip (A-grade and standard grade)
  • Output Voltage (VOUT) accuracy over load, and temperature: ±1% (new chip)
  • Output current: Up to 100mA
  • Low IQ (new chip): 69µA at ILOAD = 0mA
  • Low IQ (new chip): 620µA at ILOAD = 100mA
  • Shutdown current over temperature:
    • < 1µA (legacy chip)
    • ≤ 1.75µA (new chip)
  • Output current limiting and thermal protection
  • Stable with 2.2µF ceramic capacitors (new chip)
  • High PSRR (new chip):
    • 75dB at 1kHz, 45dB at 1MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)
  • Input voltage (VIN) range:
    • Legacy chip: 2.2V to 16V
    • New chip: 2.5V to 16V
  • Output voltage (VOUT) range: 1.2V to 5.0V
  • Output voltage (VOUT) accuracy:
    • ±0.75% for A-grade legacy chip
    • ±1.25% for standard-grade legacy chip
    • ±0.5% for new chip (A-grade and standard grade)
  • Output Voltage (VOUT) accuracy over load, and temperature: ±1% (new chip)
  • Output current: Up to 100mA
  • Low IQ (new chip): 69µA at ILOAD = 0mA
  • Low IQ (new chip): 620µA at ILOAD = 100mA
  • Shutdown current over temperature:
    • < 1µA (legacy chip)
    • ≤ 1.75µA (new chip)
  • Output current limiting and thermal protection
  • Stable with 2.2µF ceramic capacitors (new chip)
  • High PSRR (new chip):
    • 75dB at 1kHz, 45dB at 1MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)

The LP2981 and LP2981A (LP2981x) are fixed-output, low-dropout (LDO) voltage regulators supporting an input voltage range from 2.5V to 16V (for new chip only) and up to 100mA of load current. The LP2981x support an output range of 1.2V to 5.0V (new chip).

Additionally, the LP2981x (new chip) has a ±1% output accuracy across load and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

In the new chip, wide bandwidth PSRR performance is 75dB at 1kHz and 45dB at 1MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

In the new chip, the internal soft-start mechanism reduces inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2981 and LP2981A (LP2981x) are fixed-output, low-dropout (LDO) voltage regulators supporting an input voltage range from 2.5V to 16V (for new chip only) and up to 100mA of load current. The LP2981x support an output range of 1.2V to 5.0V (new chip).

Additionally, the LP2981x (new chip) has a ±1% output accuracy across load and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

In the new chip, wide bandwidth PSRR performance is 75dB at 1kHz and 45dB at 1MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

In the new chip, the internal soft-start mechanism reduces inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.
filter 尋找其它 線性與低壓差 (LDO) 穩壓器
下載 觀看有字幕稿的影片 影片

您可能會感興趣的類似產品

open-in-new 比較替代產品
具備升級功能，可直接投入使用替代所比較的裝置。
LP2985 現行 具啟用功能的 150-mA、16-V、低壓差電壓穩壓器 Better noise
LP2981A 現行 具高準確度與啟用功能的 100-mA、16-V、低壓差電壓穩壓器 Better PSRR
功能相同，但針腳輸出與所比較的裝置不同。
TPS7A25 現行 具有電源正常指示的 300-mA、18-V、超低 IQ、高準確度、可調整低壓差電壓穩壓器 This is a higher output (300-mA) LDO with power good and lower IQ (2.5 μA)

技術文件

找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 27
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 LP2981x 100mA, Low-Dropout Regulator in SOT-23 Package datasheet (Rev. I) PDF | HTML 2025/2/11
Circuit design Isolated power supply, low-noise circuit: 5V, 100mA (Rev. B) PDF | HTML 2024/9/23
應用說明 LDO Noise Demystified (Rev. B) PDF | HTML 2020/8/18
應用說明 ESR, Stability, and the LDO Regulator (Rev. A) 2020/1/7
應用說明 A Topical Index of TI LDO Application Notes (Rev. F) 2019/6/27
應用說明 Fundamental Theory of PMOS LDO Voltage Regulators (Rev. A) 2018/8/17
應用說明 LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 2017/8/9
應用說明 A Topical Index of TI Supply Voltage Supervisor (SVS) Application Notes 2015/6/15
類比設計期刊 Techniques for accurate PSRR measurements 2013/10/28
應用說明 AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) 2013/5/6
應用說明 AN-1482 LDO Regulator Stability Using Ceramic Output Capacitors (Rev. A) 2013/4/25
應用說明 AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) 2013/4/24
應用說明 AN-1950 Silently Powering Low Noise Applications (Rev. A) 2013/4/22
應用說明 LDO Performance Near Dropout 2010/10/8
應用說明 3.6V – 5.5V Input, LDO with Dual-Level Output Reference Design for MSP430 (Rev. A) 2010/6/14
應用說明 3.6V – 5.5V Input, LDO Reference Design for MSP430 (Rev. A) 2010/6/14
應用說明 Packaging Limits Range of Linear Regulators 2010/5/8
應用說明 Simple Power Solution Using LDOs for the DM365 (Rev. A) 2009/9/11
應用說明 Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 2008/6/4
應用說明 Linear and Switching Voltage Regulator Fundamental Part 1 2007/3/21
應用說明 Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A) 2006/10/13
應用說明 Understanding LDO Dropout 2005/5/9
更多文件說明 LP2981/85 Product Clip 2004/9/9
應用說明 Extending the Input Voltage Range of an LDO Regulator 2002/8/16
應用說明 Understanding the Terms and Definitions of LDO Voltage Regulators 1999/10/21
應用說明 Technical Review of Low Dropout Voltage Regulator Operation And Performance 1999/8/30
Application brief Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range 1999/6/11

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

MULTIPKGLDOEVM-823 — 支援 DBV、DRB、DRV 和 DQN 封裝的通用 LDO 線性穩壓器評估模組

MULTIPKGLDOEVM-823 評估模組 (EVM) 可協助您評估多種常用線性穩壓器封裝的運作與性能，以了解是否可在電路應用中使用。此特定 EVM 配置具有 DRB、DRV、DQN 和 DBV 元件封裝，能讓您焊接並評估低壓差 (LDO) 穩壓器。

使用指南: PDF
支援產品和硬體
有庫存
限制：
??asset.out-of-stock-ti_zh_TW??
無法提供
參考設計

PMP20967 — 適用於瞬態測試的可調整的雙級定電流負載參考設計

這套可調式雙級定電流負載參考設計，可協助工程師利用特殊功能及簡易操作來測試電源供應器輸出負載瞬態回應。其電路板爲低電平和高電平提供負載瞬態調整，電壓轉換率可高達 100 A/µs。電路板上還設計了時序調整，如時間週期、延遲和脈衝寬度。
支援產品和硬體
參考設計

PMP31179 — 適用於航空電子產業的 400-W AC/DC 參考設計

這是一款精巧的 30-V DC、400-W 參考設計，適合介於 400 Hz 和 800 Hz 之間的主電源頻率的航空電子應用。採用 UCC28064A 為基礎的雙相交錯轉換模式 (TM) 功率因數校正 (PFC)，可修正功率因數，並將輸入電流的諧波含量降到最低。DC/DC 使用具有 UCC256404 的 HB-LLC 階段進行實作。在二次側使用同步整流可進一步提升效率。
支援產品和硬體
參考設計

TIDA-010015 — 94.5% 效率、500W 工業 AC-DC 參考設計

此參考設計為一款精巧、高效率的 24-V DC、500-W 參考設計，適用於工業 AC/DC 電源供應器。此設計包含以 UCC28064A 為基礎的前端、雙相交錯式轉換模式 (TM) 功率因數校正 (PFC)。這可將 PFC 電感器尺寸縮減至最低，並降低 EMI 濾波器需求。DC-DC 使用 HB-LLC 階段進行實作，HB-LLC 階段使用 TI UCC256301 裝置進行實作。為了提升效率，同步整流會在使用 UCC24612 的二次側使用。
支援產品和硬體
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

訂購與品質

建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片