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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM34923

現行

80V、600 mA 恒定導通時間降壓切換穩壓器

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產品規格表

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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
LMR38010 現行 具 40-µA IQ 的 SIMPLE SWITCHER® 80-V、1.0-A、2.2-MHz 降壓轉換器 Smaller footprint, lower EMI, lower IQ, higher efficiency and spread spectrum.

LM34923

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.65 Vin (min) (V) 6 Vin (max) (V) 75 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 800 Features Over Current Protection, Power good Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 75 Iq (typ) (µA) 1000 Duty cycle (max) (%) 97
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 0.65 Vin (min) (V) 6 Vin (max) (V) 75 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 800 Features Over Current Protection, Power good Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 75 Iq (typ) (µA) 1000 Duty cycle (max) (%) 97
VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • Operating Input Voltage Range: 6V to 75V
  • Integrated 80V, N-Channel Buck Switch
  • Internal Start-up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with Line and Load Variations
  • Adjustable Output voltage From 2.5V
  • Precision Internal Reference, ±2.5%
  • Intelligent Current Limit Reduces Foldback
  • Programmable Input UV Detector with Status Flag Output
  • Pre-charge Switch Enables Bootstrap Gate Drive with No Load
  • Thermal Shutdown
  • 10-Pin VSSOP Package
  • Operating Input Voltage Range: 6V to 75V
  • Integrated 80V, N-Channel Buck Switch
  • Internal Start-up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with Line and Load Variations
  • Adjustable Output voltage From 2.5V
  • Precision Internal Reference, ±2.5%
  • Intelligent Current Limit Reduces Foldback
  • Programmable Input UV Detector with Status Flag Output
  • Pre-charge Switch Enables Bootstrap Gate Drive with No Load
  • Thermal Shutdown
  • 10-Pin VSSOP Package

The LM34923 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient Buck bias regulator. This high voltage regulator contains an 80V N-Channel MOSFET Switch and a startup regulator. The device is easy to implement and is provided in an 10-pin VSSOP package. The regulator’s control scheme uses an on-time inversely proportional to VIN. This feature results in the operating frequency remaining relatively constant with line and load variations. The control scheme requires no loop compensation, resulting in fast transient response. An intelligent current limit is implemented with a forced off-time which is inversely proportional to VOUT. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal Shutdown, VCC Under Voltage Lock-out, Max Duty Cycle Limiter, a Pre-charge Switch, and a programmable Under Voltage Detector with a status flag output.

The LM34923 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient Buck bias regulator. This high voltage regulator contains an 80V N-Channel MOSFET Switch and a startup regulator. The device is easy to implement and is provided in an 10-pin VSSOP package. The regulator’s control scheme uses an on-time inversely proportional to VIN. This feature results in the operating frequency remaining relatively constant with line and load variations. The control scheme requires no loop compensation, resulting in fast transient response. An intelligent current limit is implemented with a forced off-time which is inversely proportional to VOUT. This scheme ensures short circuit control while providing minimum foldback. Other features include: Thermal Shutdown, VCC Under Voltage Lock-out, Max Duty Cycle Limiter, a Pre-charge Switch, and a programmable Under Voltage Detector with a status flag output.
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類型 標題 日期
* Data sheet LM34923 80V, 600 mA Constant On-Time Buck Switching Regulator datasheet (Rev. A) 2013年 2月 20日
User guide AN-2050 LM5006 Evaluation Board (Rev. A) 2013年 4月 25日
User guide AN-2147 LM34923 Evaluation Board (Rev. A) 2013年 4月 25日
Application note AN-2171 Designing Constant-On-Time Buck Regulators for Low Drop-Out Voltage (Rev. A) 2013年 4月 23日

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