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AC/DC 和 DC/DC 转换器（集成 FET）

LM34919C-Q1

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汽车类 4.5V 至 50V 宽输入电压、600mA、2.6MHz 超小型恒定导通时间非同步降压稳压器

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open-in-new 比较替代产品
功能与比较器件相同，但引脚排列有所不同
TPS560430-Q1 正在供货 通过汽车认证的 SIMPLE SWITCHER® 4V 至 36V、600mA 同步降压转换器 PFM and PWM selectable options in an SOT-23 package.

LM34919C-Q1

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产品详情

Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 4.5 Vin (max) (V) 50 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2600 Features Enable, Power good, Soft Start Adjustable Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 45 Iq (typ) (µA) 2200 Duty cycle (max) (%) 99
Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 4.5 Vin (max) (V) 50 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2600 Features Enable, Power good, Soft Start Adjustable Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 45 Iq (typ) (µA) 2200 Duty cycle (max) (%) 99
DSBGA (YZR) 12 3.9375 mm² 2.25 x 1.75 WSON (DNT) 12 16 mm² 4 x 4
  • AEC-Q100 qualified (Tj = –40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
  • Input Voltage Range: 4.5 V to 50 V
  • Integrated N-Channel buck switch
  • Integrated Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with
    Load Current and Input Voltage
  • Adjustable Output Voltage
  • Power Good Output
  • Enable Input
  • Valley Current Limit at 0.64 A Typical
  • Precision Internal Voltage Reference
  • Low IQ Shutdown (<10 µA)
  • Highly Efficient Operation
  • Thermal Shutdown
  • 12-Bump 2 mm × 2 mm DSBGA and 12-pin 4
    mm × 4 mm WSON Packages
  • AEC-Q100 qualified (Tj = –40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
  • Input Voltage Range: 4.5 V to 50 V
  • Integrated N-Channel buck switch
  • Integrated Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with
    Load Current and Input Voltage
  • Adjustable Output Voltage
  • Power Good Output
  • Enable Input
  • Valley Current Limit at 0.64 A Typical
  • Precision Internal Voltage Reference
  • Low IQ Shutdown (<10 µA)
  • Highly Efficient Operation
  • Thermal Shutdown
  • 12-Bump 2 mm × 2 mm DSBGA and 12-pin 4
    mm × 4 mm WSON Packages

The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.

The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM34919C-Q1 Ultra Small 50V, 600mA Const On-Time Buck Switchg Reg 数据表 (Rev. A) 2013年 12月 12日
用户指南 LM34919C Evaluation Board User's Guide 2013年 9月 3日

设计和开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

LM34919CQSDEVM — LM34919C-Q1 50V、600mA 宽输入电压恒定导通时间降压开关稳压器评估模块

The LM34919CQSDEVM evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 3.3V output over an input range of 4.5V to 50V. The circuit delivers load currents to 600 mA, with (...)

用户指南: PDF
TI.com 上无现货
评估板

LM34919CQTLEVM — LM34919C-Q1 50V、600 mA 宽输入电压恒定导通时间降压开关稳压器评估模块

The LM34919CQTLEVM evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 3.3V output over an input range of 4.5V to 50V. The circuit delivers load currents to 600 mA, with (...)

用户指南: PDF
TI.com 上无现货
仿真模型

LM34919C-Q1 PSpice Transient Model (Rev. A)

SNVM638A.ZIP (63 KB) - PSpice Model
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仿真模型

LM34919C-Q1 Unencrypted PSpice Transient Model (Rev. A)

SNVM979A.ZIP (3 KB) - PSpice Model
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参考设计

TIDA-00223 — 车用音频 I2S 同轴 D 类放大器的参考设计

这款基于 I²S/TDM 的参考设计是光纤/模拟铜线的低成本易用型替代品，用于将汽车（声音）控制面板连接到输出级/功率放大器。它既支持 I²S，也支持 TDM，能够将数字音频信号传输至扬声器的 16 个独立通道（各通道的功率输出均为 80W/4Ω）。它也支持采用单一屏蔽双绞线 (STP) 或同轴电缆通过 I²C 与控制单元或处理器进行双向通信。此外，TIDA-00223 参考设计附带电源，支持快速实施，并可满足现代汽车对于保护和诊断功能的所有需求。
设计指南: PDF
原理图: PDF
参考设计

TIDA-00098 — AptinaTM 汽车摄像机模块

此参考设计是包含 Aptina 图像传感器和处理器以及 TI FPD-Link III 串行器的汽车摄像头模块解决方案。此模块采用来自 Aptina 的 AR0132AT 1.2Mp 图像传感器、 AP0101AT 图像信号处理器 (ISP) 以及来自德州仪器 (TI) 的 LM34919C、TPS62231 降压稳压器和 DS90UB913A-Q1 FPD-Link III。该组合提供紧凑的双板汽车摄像头解决方案。仅需一根同轴电缆进行摄像头数据/控制信号传输和输入电源。
测试报告: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
DSBGA (YZR) 12 Ultra Librarian
WSON (DNT) 12 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

支持和培训

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