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線性與低壓差 (LDO) 穩壓器

LP3991

現行

具啟用功能的 300-mA、低壓降電壓穩壓器

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產品規格表

LP3991

現行
產品規格表 立即訂購

產品詳細資料

Output options Fixed Output Iout (max) (A) 0.3 Vin (max) (V) 3.6 Vin (min) (V) 1.65 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 Rating Catalog Noise (µVrms) 280 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 0.05 Thermal resistance θJA (°C/W) 190 Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 75 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 0.3 Vin (max) (V) 3.6 Vin (min) (V) 1.65 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 Rating Catalog Noise (µVrms) 280 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 0.05 Thermal resistance θJA (°C/W) 190 Load capacitance (min) (µF) 4.7 Regulated outputs (#) 1 Features Enable 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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類型 標題 日期
* Data sheet LP3991 300-mA LDO for Digital Applications datasheet (Rev. J) PDF | HTML 2016年 6月 15日
EVM User's guide AN-1416 LP3991TL DSBGA Evaluation Board Information (Rev. B) 2013年 4月 30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

PMP10600 — Xilinx® Zynq® 7000 系列 (XC7Z015) 電源解決方案 (5W) 參考設計

The PMP10600.1 reference design provides all the power supply rails necessary to power Xilinx® Zynq® 7000 series (XC7Z015) FPGA.   This design uses several LMZ3 series modules, LDOs, and a DDR termination regulator.  It also features one LM3880 for power up and power (...)
Test report: PDF
電路圖: PDF
參考設計

PMP10601 — Xilinx® Zynq® 7000 系列 (XC7Z015) 電源解決方案 (8W) 參考設計

The PMP10601 reference design provides all the power supply rails necessary to power Xilinx® Zynq® 7000 series (XC7Z015)  FPGA.   This design uses several LMZ3 series modules, LDOs, and a DDR termination regulator to provide all the necessary rails to power the FPGA.  It also (...)
Test report: PDF
電路圖: PDF
參考設計

PMP10630 — Xilinx Kintex UltraScale XCKU040 FPGA 電源解決方案、6W 參考設計

The PMP10630 reference design is a complete high density power solution for Xilinx® Kintex® UltraScale™ XCKU040 FPGA. This design uses an optimal combination of SIMPLE SWITCHER® modules and LDOs to provide all the necessary voltage rails in a small solution size of 36 x 43 mm (1.4 (...)
Test report: PDF
電路圖: PDF
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DSBGA (YZR) 4 Ultra Librarian
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