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线性和低压降 (LDO) 稳压器

LM317MQ

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适用于汽车应用的 500mA、40V、可调节线性稳压器

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数据表

LM317MQ

正在供货
数据表 立即订购

产品详情

Rating Automotive Vin (max) (V) 37, 40 Vin (min) (V) 2.5, 3 Iout (max) (A) 0.5 Output options Adjustable Output, Fixed Output Vout (max) (V) 37 Vout (min) (V) 1.25 Noise (µVrms) 38 PSRR at 100 KHz (dB) 22 Iq (typ) (mA) 3.5 Thermal resistance θJA (°C/W) 60 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -40 to 125
Rating Automotive Vin (max) (V) 37, 40 Vin (min) (V) 2.5, 3 Iout (max) (A) 0.5 Output options Adjustable Output, Fixed Output Vout (max) (V) 37 Vout (min) (V) 1.25 Noise (µVrms) 38 PSRR at 100 KHz (dB) 22 Iq (typ) (mA) 3.5 Thermal resistance θJA (°C/W) 60 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -40 to 125
SOT-223 (DCY) 4 45.5 mm² 6.5 x 7
  • Adjustable output voltage range (VOUT): 1.25V to 37V
  • Output current (IOUT): Up to 500mA
  • Built-in, short-circuit current limiting and thermal protection
  • Stable without any output capacitor
  • Operating temperature range: –40°C to +125°C
  • Packages:
    • 4-pin, 6.5mm × 7mm SOT-223 (RθJA : 77.7°C/W)
    • 3-pin, 6.6mm × 10.11mm TO-252 (RθJA : 31.7°C/W)
  • Adjustable output voltage range (VOUT): 1.25V to 37V
  • Output current (IOUT): Up to 500mA
  • Built-in, short-circuit current limiting and thermal protection
  • Stable without any output capacitor
  • Operating temperature range: –40°C to +125°C
  • Packages:
    • 4-pin, 6.5mm × 7mm SOT-223 (RθJA : 77.7°C/W)
    • 3-pin, 6.6mm × 10.11mm TO-252 (RθJA : 31.7°C/W)

The LM317M and LM317MQ are adjustable three-pin, positive-voltage regulators capable of supplying an output current of 0.5A over an output voltage range of 1.25V to 37V. The device requires only two external resistors to set the output voltage. The device features a typical line regulation of 0.01% and typical load regulation of 0.1%. The device includes current limiting, thermal overload protection, and safe operating area protection.

The device is a floating regulator meaning there is no device ground terminal. Quiescent current flows to the load instead of being wasted flowing to ground. Regulated output voltage of hundreds of volts is possible if the maximum input to output differential does not exceed 40V at any time. The device functions as a floating current source controlled by a single resistor.

Additionally, the device does not need an output capacitor for stable operation across the load current range. Optionally, add an electrolytic or tantalum output capacitor to improve transient response. Ceramic output capacitors are available, but output ringing is potentially present on transients. Bypass the ADJUST pin with any type of capacitor to achieve high ripple-rejection ratios.

The LM317M and LM317MQ are adjustable three-pin, positive-voltage regulators capable of supplying an output current of 0.5A over an output voltage range of 1.25V to 37V. The device requires only two external resistors to set the output voltage. The device features a typical line regulation of 0.01% and typical load regulation of 0.1%. The device includes current limiting, thermal overload protection, and safe operating area protection.

The device is a floating regulator meaning there is no device ground terminal. Quiescent current flows to the load instead of being wasted flowing to ground. Regulated output voltage of hundreds of volts is possible if the maximum input to output differential does not exceed 40V at any time. The device functions as a floating current source controlled by a single resistor.

Additionally, the device does not need an output capacitor for stable operation across the load current range. Optionally, add an electrolytic or tantalum output capacitor to improve transient response. Ceramic output capacitors are available, but output ringing is potentially present on transients. Bypass the ADJUST pin with any type of capacitor to achieve high ripple-rejection ratios.

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类型 标题 下载最新的英语版本 日期
* 数据表 LM317M, LM317MQ 3-Pin Adjustable Regulators 数据表 (Rev. Q) PDF | HTML 2025年 7月 25日
应用手册 LDO 噪声揭秘 (Rev. B) PDF | HTML 英语版 (Rev.B) PDF | HTML 2020年 9月 16日
应用手册 LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 2017年 8月 9日
应用手册 简化的 LDO PSRR 测量 最新英语版本 (Rev.A) PDF | HTML 2010年 7月 28日

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评估板

LM317A-337N-EVM — 3 引脚可调节稳压器评估模块

LM317A-337N-EVM 演示了 LM317A 可调稳压器及其负向互补稳压器 LM337-N 的典型应用。此评估模块为每个器件采用 SOT-223 封装选项，提供高达 1.0A 的负载电流。此 EVM 可轻松修改以填充 TO-220 版器件，从而适应 1.5A 工作电流。此模块提供了足量的占用空间供客户选择电容，还具有 4 个铜层和散热空间以实现出色的功耗。

用户指南: PDF
TI.com 上无现货
封装 引脚 CAD 符号、封装和 3D 模型
SOT-223 (DCY) 4 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

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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