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線性與低壓差 (LDO) 穩壓器

LP2981-N

現行

具啟用功能的 100-mA、16-V、低壓差電壓穩壓器

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
此產品將繼續向現有客戶提供。新設計應考量替代產品。
引腳對引腳且具備與所比較裝置相同的功能
TPS7A24 現行 具啟用功能的 200mA、18V、超低 IQ 低壓差 (LDO) 電壓穩壓器 Ultra-low-IQ (2 µA)

LP2981-N

現行
產品規格表 立即訂購

產品詳細資料

Output options Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 16 Vin (min) (V) 2.7 Vout (max) (V) 5 Vout (min) (V) 2.5 Fixed output options (V) 2.5, 3, 3.3, 3.6, 5 Noise (µVrms) 160 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 176 Rating Catalog Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR at 100 KHz (dB) 41 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 16 Vin (min) (V) 2.7 Vout (max) (V) 5 Vout (min) (V) 2.5 Fixed output options (V) 2.5, 3, 3.3, 3.6, 5 Noise (µVrms) 160 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 176 Rating Catalog Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR at 100 KHz (dB) 41 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Input Voltage (V IN) Range:
    • Legacy chip: 2.1 V to 16 V
    • New chip: 2.5 V to 16 V
  • Output Voltage (V OUT) Range: 1.2 V to 5.0 V
  • Output Voltage (V OUT) 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 (V OUT) accuracy over load, and temperature: ±1% (new chip)
  • Output current: Up to 100 mA
  • Low I Q (new chip): 69 µA at I LOAD = 0 mA
  • Low I Q (new chip): 620 µA at I LOAD = 100 mA
  • Shutdown current over temperature:
    • < 1 µA (legacy chip)
    • ≤ 1.75 µA (new chip)
  • Output current limiting and thermal protection
  • Stable with 2.2-µF ceramic capacitors (new chip)
  • High PSRR (new chip):
    • 75 dB at 1 kHz, 45 dB at 1 MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)
  • Input Voltage (V IN) Range:
    • Legacy chip: 2.1 V to 16 V
    • New chip: 2.5 V to 16 V
  • Output Voltage (V OUT) Range: 1.2 V to 5.0 V
  • Output Voltage (V OUT) 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 (V OUT) accuracy over load, and temperature: ±1% (new chip)
  • Output current: Up to 100 mA
  • Low I Q (new chip): 69 µA at I LOAD = 0 mA
  • Low I Q (new chip): 620 µA at I LOAD = 100 mA
  • Shutdown current over temperature:
    • < 1 µA (legacy chip)
    • ≤ 1.75 µA (new chip)
  • Output current limiting and thermal protection
  • Stable with 2.2-µF ceramic capacitors (new chip)
  • High PSRR (new chip):
    • 75 dB at 1 kHz, 45 dB at 1 MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)

The LP2981-N is a fixed-output, low-dropout (LDO) voltage regulator supporting an input voltage range from 2.5 V to 16 V (for new chip only) and up to 100 mA of load current. The LP2981-N supports an output range of 1.2 V to 5.0 V (new chip).

Additionally, the LP2981-N (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 75 dB at 1 kHz and 45 dB at 1 MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current-limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2981-N is a fixed-output, low-dropout (LDO) voltage regulator supporting an input voltage range from 2.5 V to 16 V (for new chip only) and up to 100 mA of load current. The LP2981-N supports an output range of 1.2 V to 5.0 V (new chip).

Additionally, the LP2981-N (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 75 dB at 1 kHz and 45 dB at 1 MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current-limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.
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類型 標題 日期
* Data sheet LP2981-N 100-mA, Low-Dropout Regulator in SOT-23 Package datasheet (Rev. O) PDF | HTML 2023年 12月 6日
Application note AN-1172 LP2980, LP2981, LP2982, LP2985 Micro SMD Demo Boards (Rev. B) 2013年 4月 25日
Application note AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) 2013年 4月 23日

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參考設計

TIDA-010047 — 採用 Si MOSFET 的 22-W/in3、93.1% 峰值效率、100-W USB-PD 3.0 AC/DC 適配器參考設計

This fully-tested reference design is a high-efficiency, high-power-density, AC/DC adapter solution with a wide input voltage range (100- to 240-V AC) for laptop adapters and smartphone charger applications. This design consists of a front-end transition-mode (TM) power factor correction (PFC) (...)
Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
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