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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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功能与比较器件相同但引脚有所不同
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.

产品详情

Vin (min) (V) 4.5 Vin (max) (V) 50 Vout (min) (V) 2.5 Vout (max) (V) 45 Iout (max) (A) 0.6 Iq (typ) (mA) 2.2 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2600 Features Enable, Power good, Soft Start Adjustable Operating temperature range (°C) -40 to 125 Rating Automotive Regulated outputs (#) 1 Control mode Constant on-time (COT) Duty cycle (max) (%) 99 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 50 Vout (min) (V) 2.5 Vout (max) (V) 45 Iout (max) (A) 0.6 Iq (typ) (mA) 2.2 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2600 Features Enable, Power good, Soft Start Adjustable Operating temperature range (°C) -40 to 125 Rating Automotive Regulated outputs (#) 1 Control mode Constant on-time (COT) Duty cycle (max) (%) 99 Type Converter
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
仿真模型

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

SNVM979A.ZIP (3 KB) - PSpice Model
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
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
参考设计

PMP9300 — 针对汽车摄像机模块中图像传感器的电源解决方案

该参考设计可为汽车摄像头模块中的 Aptina AR0132 图像传感器提供紧凑型电源解决方案(电路板尺寸为 20 x 20mm)。该设计附带电源板和滤波板。电源板上带有两个同步降压稳压器,即 LM34919C 和 TPS62231,可提供 1.8V 和 2.8V 输出。RC 输出滤波器专为图像传感器所需的内核、模拟和 I/O 电源轨设计,用于减少纹波并确保加电定序正确。输入电压范围介于 4.5V 到 50V 之间,适用于 12V 汽车电池电源。滤波板旨在启用同轴电缆供电配置,可通过一根电缆传输电源和 FPD-Link III (...)
测试报告: PDF
原理图: PDF
封装 引脚 下载
DSBGA (YZR) 12 查看选项
WSON (DNT) 12 查看选项

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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