LM34919

現行

2x1.5mm、8-40V 大範圍 Vin、600mA 固定導通時間非同步降壓穩壓器

現在提供此產品的更新版本

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產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 8 Vin (max) (V) 40 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 Iq (typ) (µA) 500 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 8 Vin (max) (V) 40 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 Iq (typ) (µA) 500 Duty cycle (max) (%) 98
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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類型 標題 日期
* Data sheet LM34919 Ultra Small 40V, 600 mA Constant On-Time Buck Switching Regulator datasheet (Rev. E) 2013年 2月 19日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
EVM User's guide AN-1650 LM34919 Evaluation Board (Rev. A) 2013年 4月 25日

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM34919EVAL — LM34919 寬輸入電壓恆定導通時間降壓切換穩壓器評估模組

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 (...)

使用指南: PDF
TI.com 無法提供
模擬型號

LM34919 PSpice Transient Model

SLVMAO8.ZIP (77 KB) - PSpice Model
模擬型號

LM34919 Unencrypted PSpice Transient Model

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

LM34919QUICK-CALC — LM34919 快速入門計算機

封裝 針腳 CAD 符號、佔位空間與 3D 模型
DSBGA (YPA) 10 Ultra Librarian

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  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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