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线性和低压降 (LDO) 稳压器

LP3991

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具有使能功能的 300mA、低压降稳压器

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LP3991

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产品详情

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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类型 标题 下载最新的英语版本 日期
* 数据表 LP3991 300-mA LDO for Digital Applications 数据表 (Rev. J) PDF | HTML 2016年 6月 15日
EVM 用户指南 AN-1416 LP3991TL DSBGA Evaluation Board Information (Rev. B) 2013年 4月 30日
应用手册 Application Note 1416 LP3991TL micro SMD Evaluation Board Information (cn) 2007年 3月 11日

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评估板

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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 (...)

用户指南: PDF
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PMP10630 参考设计是 Xilinx® Kintex® UltraScale™ XCKU040 FPGA 的完整高密度电源解决方案。此设计采用 SIMPLE SWITCHER® 模块与 LDO 的最佳组合，以 36 x 43 mm（1.4 x 1.7 英寸）的较小解决方案尺寸提供所有必要的电压轨。此设计包含为内核电压轨供电的 LMZ31704 LMZ3 系列模块以及三个 LMZ21700/1 Nano 系列模块。此设计使用 LM3880 序列发生器来管理正确的电源定序，此外还包含带 LP2998 DDR 终端稳压器的 DDR3 (...)
测试报告: PDF
原理图: PDF
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DSBGA (YZR) 4 Ultra Librarian
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