LP2951-N

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具有电源正常指示和使能功能的 100mA、30V、低压降稳压器

产品详情

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 30 Vin (min) (V) 2.3 Vout (max) (V) 29 Vout (min) (V) 1.24 Fixed output options (V) 3, 3.3, 5, 29 Rating Catalog Noise (µVrms) 160 PSRR at 100 KHz (dB) 51 Iq (typ) (mA) 0.075 Thermal resistance θJA (°C/W) 43, 56, 118, 171 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 2.5 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 30 Vin (min) (V) 2.3 Vout (max) (V) 29 Vout (min) (V) 1.24 Fixed output options (V) 3, 3.3, 5, 29 Rating Catalog Noise (µVrms) 160 PSRR at 100 KHz (dB) 51 Iq (typ) (mA) 0.075 Thermal resistance θJA (°C/W) 43, 56, 118, 171 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 2.5 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9 WSON (NGT) 8 16 mm² 4 x 4
  • Input Voltage Range: 2.3 V to 30 V
  • 5-V, 3-V, and 3.3-V Output Voltage Versions Available
  • High Accuracy Output Voltage
  • Ensured 100-mA Output Current
  • Extremely Low Quiescent Current
  • Low Dropout Voltage
  • Extremely Tight Load and Line Regulation
  • Very Low Temperature Coefficient
  • Use as Regulator or Reference
  • Needs Minimum Capacitance for Stability
  • Current and Thermal Limiting
  • Stable With Low-ESR Output Capacitors (10 mΩ to 6 Ω)
  • LP2951-N Versions Only:
    • Error Flag Warns of Output Dropout
    • Logic-Controlled Electronic Shutdown
    • Output Programmable From 1.24 V to 29 V
  • Input Voltage Range: 2.3 V to 30 V
  • 5-V, 3-V, and 3.3-V Output Voltage Versions Available
  • High Accuracy Output Voltage
  • Ensured 100-mA Output Current
  • Extremely Low Quiescent Current
  • Low Dropout Voltage
  • Extremely Tight Load and Line Regulation
  • Very Low Temperature Coefficient
  • Use as Regulator or Reference
  • Needs Minimum Capacitance for Stability
  • Current and Thermal Limiting
  • Stable With Low-ESR Output Capacitors (10 mΩ to 6 Ω)
  • LP2951-N Versions Only:
    • Error Flag Warns of Output Dropout
    • Logic-Controlled Electronic Shutdown
    • Output Programmable From 1.24 V to 29 V

The LP2950-N and LP2951-N are micropower voltage regulators with very low quiescent current (75 µA typical) and very low dropout voltage (typical 40 mV at light loads and 380 mV at 100 mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the device increases only slightly in dropout, prolonging battery life.

Careful design of the LP2950-N/LP2951-N has minimized all contributions to the error budget. This includes a tight initial tolerance (0.5% typical), extremely good load and line regulation (0.05% typical) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.

One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5-V, 3-V, or 3.3-V output (depending on the version), or programmed from 1.24 V to 29 V with an external pair of resistors.

The LP2950-N is available in the surface-mount TO-252 package and in the popular 3-pin TO-92 package for pin-compatibility with older 5-V regulators. The 8-pin LP2951-N is available in plastic, ceramic dual-in-line, WSON, or metal can packages and offers additional system functions.

The LP2950-N and LP2951-N are micropower voltage regulators with very low quiescent current (75 µA typical) and very low dropout voltage (typical 40 mV at light loads and 380 mV at 100 mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the device increases only slightly in dropout, prolonging battery life.

Careful design of the LP2950-N/LP2951-N has minimized all contributions to the error budget. This includes a tight initial tolerance (0.5% typical), extremely good load and line regulation (0.05% typical) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.

One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5-V, 3-V, or 3.3-V output (depending on the version), or programmed from 1.24 V to 29 V with an external pair of resistors.

The LP2950-N is available in the surface-mount TO-252 package and in the popular 3-pin TO-92 package for pin-compatibility with older 5-V regulators. The 8-pin LP2951-N is available in plastic, ceramic dual-in-line, WSON, or metal can packages and offers additional system functions.

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类型 标题 下载最新的英语版本 日期
* 数据表 LP295x-N Series of Adjustable Micropower Voltage Regulators 数据表 (Rev. Q) PDF | HTML 2017年 12月 8日
EVM 用户指南 LP2951 EVM User's Guide (Rev. A) 2018年 1月 5日
应用手册 AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) 2013年 4月 23日
更多文献资料 Die D/S LP2951 MDS Series of Adjustable Micropower Voltage Regs 2012年 12月 20日
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设计和开发

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评估板

LP2951EVM — LP2951 固定/可调微功耗低压降 (LDO) 稳压器评估模块

LP2951 器件是双极低压降 (LDO) 电压稳压器,可适应高达 30V 的宽输入电源电压范围,具有高达 100mA 的输出负载。LP2951EVM 可实现设计灵活性,使用户能够添加或删除输入和输出电容器以及旁路电容器。此外,LP2951EVM 可使用户能够以固定输出电压模式或可调输出电压模式操作器件,从而实现对 LP2951 器件的完整评估设置。
用户指南: PDF
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仿真模型

LP2951 PSpice Transient Model (Rev. A)

SNVM037A.ZIP (23 KB) - PSpice Model
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LP2951 Unencrypted PSpice Transient Model

SNVMAO3.ZIP (1 KB) - PSpice Model
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LP2951_N_3P0 PSpice Transient Model

SNVMAI1.ZIP (86 KB) - PSpice Model
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LP2951_N_3P0 Unencrypted PSpice Transient Model

SNVMAI0.ZIP (2 KB) - PSpice Model
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LP2951_N_3P3 PSpice Transient Model

SNVMAI4.ZIP (87 KB) - PSpice Model
仿真模型

LP2951_N_3P3 Unencrypted PSpice Transient Model

SNVMAI5.ZIP (2 KB) - PSpice Model
仿真模型

LP2951_N_5P0 PSpice Transient Model

SNVMAI6.ZIP (80 KB) - PSpice Model
仿真模型

LP2951_N_5P0 Unencrypted PSpice Transient Model

SNVMAH9.ZIP (2 KB) - PSpice Model
参考设计

TIDA-010015 — 效率为 94.5% 的 500W 工业交流/直流参考设计

此参考设计是用于工业交流/直流电源的紧凑型、高效率、24V 直流、500W 参考设计。此设计包括一个基于 UCC28064A 的交错双相转换模式 (TM) 功率因数校正 (PFC) 前端。这最大限度地减小了 PFC 电感器尺寸并降低了 EMI 滤波器要求。该直流/直流功率级通过 HB-LLC 级实现,后者使用了 TI 的 UCC256301 器件。为了提高效率,在次级侧使用 UCC24612 实现了同步整流。
设计指南: PDF
原理图: PDF
参考设计

TIDA-010009 — 适用于伺服驱动器且具有紧凑结构和较高效率的 24V 输入辅助电源参考设计

该参考设计展示了一种生成伺服或交流驱动器所需电源的方法,其中包括模拟和数字 I/O 接口、编码器电源、隔离式收发器和数字处理块。该设计还实现了输入反极性、输出过载和短路保护。
设计指南: PDF
原理图: PDF
参考设计

TIDA-00777 — 提升继电器和断路器精度、面向罗戈夫斯基线圈的有源积分器参考设计

此参考设计展示的是一款有源积分器设计,涵盖了 Rogowski 线圈的宽输入电流范围,具有出色的精度、线性度、稳定性和可重复性。此积分器采用了具有超低失调电压和温漂的精密放大器。此处显示了积分器的两种配置。一种适用于具有小于 3O 相位误差的精密测量,另一种适用于快速响应时间 (<15ms RC)。输出信号为双极,需要单极输出时也可使用可选电平转换级。
设计指南: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
WSON (NGT) 8 Ultra Librarian

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

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