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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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TPS560430-Q1 正在供货 汽车级 4V 至 36V 0.6A 同步降压 SIMPLE SWITCHER® 电源转换器 PFM and PWM selectable options in an SOT-23 package.

LM34919C-Q1

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产品详情

Rating Automotive Topology Buck Iout (max) (A) 0.6 Vin (max) (V) 50 Vin (min) (V) 4.5 Vout (max) (V) 45 Vout (min) (V) 2.5 Features Adjustable soft start, Enable, Power good Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0022 Duty cycle (max) (%) 99
Rating Automotive Topology Buck Iout (max) (A) 0.6 Vin (max) (V) 50 Vin (min) (V) 4.5 Vout (max) (V) 45 Vout (min) (V) 2.5 Features Adjustable soft start, Enable, Power good Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0022 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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* 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

设计与开发

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

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 — 同轴 D 类放大器上汽车音频 I2S 的参考设计

该参考设计基于 I²S/TDM 技术，是一种低成本、易于使用的替代方案，可替代光纤/模拟铜线，用于连接汽车（音频）控制面板与输出级/功率放大器。它支持 I²S I和 TDM，能够将数字音频信号传输到 16 个独立的扬声器通道，每个通道在 4Ω 负载下输出功率为 80W。它还支持通过 I²C 与控制单元或处理器进行双向通信，传输介质可为单根屏蔽双绞线 (STP) 或同轴电缆。此外，TIDA-00223 参考设计包含电源模块，可实现快速部署，并满足现代汽车所需的所有保护和诊断要求。
设计指南: PDF
原理图: PDF
参考设计

TIDA-00098 — Aptina™ 汽车摄像头模块参考设计

该参考设计是一款采用 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。该模块 AR0132AT 1.2Mp 图像传感器、Aptina 的 AP0101AT 图像信号处理器 (ISP) 以及德州仪器 (TI) 的 LM34919C、TPS62231 降压稳压器和 DS90UB913A-Q1 FPD-Link III 串行器。这种组合提供了一种紧凑型双板汽车摄像头解决方案。仅需一根同轴电缆即可实现摄像头数据/控制信号传输和输入电源供电。
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
适用于评估类项目的 TI 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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