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

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

立即訂購
產品規格表

LP2981A

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) 2.8, 2.9, 3, 3.3, 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 (%) 2 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) 2.8, 2.9, 3, 3.3, 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 (%) 2 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

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 16
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
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 LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 2017/8/9
應用說明 AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) 2013/4/24
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 Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A) 2006/10/13
應用說明 Understanding LDO Dropout 2005/5/9
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)。

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