LP3991

現行

具有啟用功能的 300-mA、低壓差電壓穩壓器

產品詳細資料

Rating Catalog Vin (max) (V) 3.6 Vin (min) (V) 1.65 Iout (max) (A) 0.3 Output options Fixed Output Vout (max) (V) 3 Vout (min) (V) 1.2 Fixed output options (V) 1.2, 1.3, 1.5, 1.7, 1.8, 2, 2.5, 2.8, 3 Noise (µVrms) 280 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 0.05 Features Enable Thermal resistance θJA (°C/W) 190 Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 75 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 3.6 Vin (min) (V) 1.65 Iout (max) (A) 0.3 Output options Fixed Output Vout (max) (V) 3 Vout (min) (V) 1.2 Fixed output options (V) 1.2, 1.3, 1.5, 1.7, 1.8, 2, 2.5, 2.8, 3 Noise (µVrms) 280 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 0.05 Features Enable Thermal resistance θJA (°C/W) 190 Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 75 Operating temperature range (°C) -40 to 125
DSBGA (YZR) 4 1.5625 mm² 1.25 x 1.25
  • Input Voltage From 1.65 V to 4 V
  • Output Voltage From 0.8 V to 3 V
  • 1% Accuracy at Room Temperature
  • 125-mV Dropout at 300-mA Load
  • 50-µA Quiescent Current at 1-mA Load
  • Inrush Current Controlled to 600 mA
  • PSRR 65 dB at 1 kHz
  • 100-µs Start-Up Time for 1.5-V VOUT
  • Stable With Ceramic Capacitors as Small as 0402
  • Thermal-Overload and Short-Circuit Protection
  • Input Voltage From 1.65 V to 4 V
  • Output Voltage From 0.8 V to 3 V
  • 1% Accuracy at Room Temperature
  • 125-mV Dropout at 300-mA Load
  • 50-µA Quiescent Current at 1-mA Load
  • Inrush Current Controlled to 600 mA
  • PSRR 65 dB at 1 kHz
  • 100-µs Start-Up Time for 1.5-V VOUT
  • Stable With Ceramic Capacitors as Small as 0402
  • Thermal-Overload and Short-Circuit Protection

Operating from a minimum input voltage of 1.65 V, the LP3991 LDO has been designed to provide fixed stable output voltages for load currents up to 300 mA. This device is suitable where accurate low voltages are required from low input voltage sources and is therefore suitable for post regulation of switched mode regulators. In such applications, significant improvements in performance and EMI can be realized, with little reduction in overall efficiency. The LP3991 provides fixed outputs as low as 1.2 V from a wide input range from 1.65 V to 4 V Using the enable (EN) pin, the device may be controlled to provide a shutdown state, in which negligible supply current is drawn.

The LP3991 is designed to be stable with space-saving ceramic capacitors as small as 0402 case size.

Performance is specified for a –40°C to +125°C junction temperature range. For output voltage options, contact your local Texas Instruments sales office.

For all available packages, see the orderable addendum at the end of the datasheet.

Operating from a minimum input voltage of 1.65 V, the LP3991 LDO has been designed to provide fixed stable output voltages for load currents up to 300 mA. This device is suitable where accurate low voltages are required from low input voltage sources and is therefore suitable for post regulation of switched mode regulators. In such applications, significant improvements in performance and EMI can be realized, with little reduction in overall efficiency. The LP3991 provides fixed outputs as low as 1.2 V from a wide input range from 1.65 V to 4 V Using the enable (EN) pin, the device may be controlled to provide a shutdown state, in which negligible supply current is drawn.

The LP3991 is designed to be stable with space-saving ceramic capacitors as small as 0402 case size.

Performance is specified for a –40°C to +125°C junction temperature range. For output voltage options, contact your local Texas Instruments sales office.

For all available packages, see the orderable addendum at the end of the datasheet.

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* Data sheet LP3991 300-mA LDO for Digital Applications datasheet (Rev. J) PDF | HTML 2016年 6月 15日

設計與開發

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開發板

LP3991TL-1.3EV — 適用於數位應用的 300mA 線性穩壓器

The LP3991 is a 300mA Linear Voltage Regulator for Digital Applications. Operating from a minimum input voltage of 1.65V, the LP3991 regulator has been designed to provide fixed stable output voltages for load currents up to 300mA. This device is suitable where accurate, low voltages are required (...)

使用指南: PDF
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參考設計

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Test report: PDF
電路圖: PDF
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Test report: PDF
電路圖: PDF
參考設計

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PMP10630 參考設計是適用於 Xilinx® Kintex® UltraScale™ XCKU040 FPGA 的完整高密度電源解決方案。此設計使用 SIMPLE SWITCHER® 模組和 LDO 的最佳組合,以 36 x 43 mm(1.4 x 1.7 吋)的小型解決方案尺寸提供所有必要的電壓軌。此設計包含可為核心軌供電的 LMZ31704 LMZ3 系列模組,以及三個 LMZ21700/1 Nano 系列模組。此設計使用 LM3880 序列器管理適當的電源排序,且還具備搭載 LP2998 DDR 終端穩壓器的選用 DDR3 記憶體電源供應器。此參考設計採用 12V DC (...)
Test report: PDF
電路圖: PDF
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DSBGA (YZR) 4 Ultra Librarian

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