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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM34919B-Q1

現行

車用 2x1.75mm、6-40V 大範圍 Vin、600mA、2.6MHz 恆定導通時間非同步降壓穩壓器

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
TPS560430-Q1 現行 通過車規認證的 SIMPLE SWITCHER® 4V 至 36V、600mA 同步降壓轉換器 PFM and PWM selectable options in an SOT-23 package.

LM34919B-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 6 Vin (max) (V) 40 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2600 Features Enable, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 35 Iq (typ) (µA) 780 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) 6 Vin (max) (V) 40 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2600 Features Enable, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 35 Iq (typ) (µA) 780 Duty cycle (max) (%) 99
DSBGA (YPA) 10 3.9375 mm² 2.25 x 1.75
  • AEC-Q100 Grade 1 Qualified
    (–40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
    (VIN=14V,Vo=3.3V)
  • Input Voltage Range: 6V to 40V
  • Integrated N-Channel Buck Switch
  • Integrated Startup Regulator
  • No loop compensation Required
  • Ultra-Fast transient Response
  • Operating frequency remains constant
    with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Startup
  • Adjustable Output Voltage
  • Valley Current Limit At 0.64A
  • Precision Internal Reference
  • Low Bias Current
  • Highly Efficient Operation
  • Thermal Shutdown
  • 10-Pin DSBGA Package
  • AEC-Q100 Grade 1 Qualified
    (–40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
    (VIN=14V,Vo=3.3V)
  • Input Voltage Range: 6V to 40V
  • Integrated N-Channel Buck Switch
  • Integrated Startup Regulator
  • No loop compensation Required
  • Ultra-Fast transient Response
  • Operating frequency remains constant
    with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Startup
  • 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 LM34919B 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 LM34919B 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 LM34919B Ultra Small 40V, 600 mA Constant On-Time Buck Switching Regulator datasheet (Rev. B) 2013年 7月 2日
EVM User's guide AN-2016 LM34919B Evaluation Board (Rev. A) 2013年 4月 25日

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開發板

LM34919BEVAL — LM34919BEVAL 寬輸入電壓恆定導通時間降壓切換穩壓器評估模組

The LM34919BEVAL 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 6V to 24V. The circuit delivers load currents to 600 mA, with current (...)

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LM34919BQUICK-CALC — LM34919B 快速入門計算機

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