LM34919

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2x1.5mm、8V 至 40V 宽输入电压、600mA、恒定导通时间非同步降压稳压器

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产品详情

Iout (max) (A) 0.6 Vin (min) (V) 8 Vin (max) (V) 40 Topology Buck Type Converter Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2000 Features Enable, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 35 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0005
Iout (max) (A) 0.6 Vin (min) (V) 8 Vin (max) (V) 40 Topology Buck Type Converter Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2000 Features Enable, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 35 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0005
DSBGA (YPA) 10 3.9375 mm² 2.25 x 1.75
  • Integrated N-Channel buck switch
  • Integrated start-up regulator
  • Input Voltage Range: 8V to 40V
  • No loop compensation required
  • Ultra-Fast transient response
  • Operating frequency remains constant with load current and input voltage
  • Maximum switching frequency: 2.0 MHz
  • Maximum Duty Cycle Limited During Start-Up
  • Adjustable output voltage
  • Valley Current Limit At 0.64A
  • Precision internal reference
  • Low bias current
  • Highly efficient operation
  • Thermal shutdown
  • 10-Pin DSBGA Package
  • Integrated N-Channel buck switch
  • Integrated start-up regulator
  • Input Voltage Range: 8V to 40V
  • No loop compensation required
  • Ultra-Fast transient response
  • Operating frequency remains constant with load current and input voltage
  • Maximum switching frequency: 2.0 MHz
  • Maximum Duty Cycle Limited During Start-Up
  • Adjustable output voltage
  • Valley Current Limit At 0.64A
  • Precision internal reference
  • Low bias current
  • Highly efficient operation
  • Thermal shutdown
  • 10-Pin DSBGA Package

The LM34919 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 0.6A to the load. This buck regulator contains an N-Channel Buck Switch, and is available in a 10-pin DSBGA package. 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: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

The LM34919 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 0.6A to the load. This buck regulator contains an N-Channel Buck Switch, and is available in a 10-pin DSBGA package. 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: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LM34919 Ultra Small 40V, 600 mA Constant On-Time Buck Switching Regulator 数据表 (Rev. E) 2013年 2月 19日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
EVM 用户指南 AN-1650 LM34919 Evaluation Board (Rev. A) 2013年 4月 25日
用户指南 Application Note 1650 LM34919 Evaluation Board (cn) 最新英语版本 (Rev.A) 2007年 6月 8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

LM34919EVAL — 用于 LM34919 的评估板

The LM34919 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 5V output over an input range of 8V to 40V. The circuit delivers load currents to 600 mA, with current limit (...)

用户指南: PDF
最新英语版本 (Rev.A): PDF
TI.com 上无现货
仿真模型

LM34919 PSpice Transient Model

SLVMAO8.ZIP (77 KB) - PSpice Model
仿真模型

LM34919 Unencrypted PSpice Transient Model

SNOM523.ZIP (3 KB) - PSpice Model
计算工具

LM34919QUICK-CALC — LM34919 快速入门计算器

封装 引脚 下载
DSBGA (YPA) 10 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

支持和培训

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