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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM34910

現行

8-36V、1.25A 恒定導通時間非同步降壓穩壓器

立即訂購
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
LMR33620 現行 具超低 EMI 的 SIMPLE SWITCHER® 3.8V 至 36V、2A 同步降壓轉換器 Smaller footprint, higher efficiency, lower IQ and lower EMI.
LMR50410 現行 SIMPLE SWITCHER 4-V 至 36-V、1-A 同步降壓轉換器 Current mode control, SOT23 packaging, FPWM and PFM option

LM34910

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) 1.25 Vin (min) (V) 8 Vin (max) (V) 36 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 33 Iq (typ) (µA) 630 Duty cycle (max) (%) 97
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 1.25 Vin (min) (V) 8 Vin (max) (V) 36 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection Control mode Constant on-time (COT) Vout (min) (V) 2.5 Vout (max) (V) 33 Iq (typ) (µA) 630 Duty cycle (max) (%) 97
WSON (DPR) 10 16 mm² 4 x 4
  • Integrated 40V, N-Channel Buck Switch
  • Integrated Start-Up Regulator
  • Input Voltage Range: 8V to 36V
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Start-Up
  • Adjustable Output Voltage
  • Valley Current Limit At 1.25A
  • Precision Internal Reference
  • Low Bias Current
  • Highly Efficient Operation
  • Thermal Shutdown

All trademarks are the property of their respective owners.

  • Integrated 40V, N-Channel Buck Switch
  • Integrated Start-Up Regulator
  • Input Voltage Range: 8V to 36V
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Start-Up
  • Adjustable Output Voltage
  • Valley Current Limit At 1.25A
  • Precision Internal Reference
  • Low Bias Current
  • Highly Efficient Operation
  • Thermal Shutdown

All trademarks are the property of their respective owners.

The LM34910 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 1.25A to the load. This buck regulator contains a 40V N-Channel Buck Switch, and is available in the thermally enhanced WSON-10 package. The hysteretic 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 current limit detection is set at 1.25A. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

The LM34910 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 1.25A to the load. This buck regulator contains a 40V N-Channel Buck Switch, and is available in the thermally enhanced WSON-10 package. The hysteretic 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 current limit detection is set at 1.25A. 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 LM34910 High Voltage (40V, 1.25A) Step Down Switching Regulator datasheet (Rev. B) 2013年 3月 21日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
EVM User's guide AN-1349 LM34910 Evaluation Board (Rev. A) 2013年 4月 25日

設計與開發

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模擬型號

LM34910 PSpice Transient Model

SNVM992.ZIP (81 KB) - PSpice Model
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模擬型號

LM34910 Unencrypted PSpice Transient Model

SNVM991.ZIP (3 KB) - PSpice Model
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計算工具

LM34910QUICK-CALC — LM34910 快速入門計算機

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WSON (DPR) 10 Ultra Librarian
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