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LM34919C-Q1

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TPS560430-Q1 現行 車用 4V 至 36V、0.6A 同步降壓 SIMPLE SWITCHER® 電源轉換器 PFM and PWM selectable options in an SOT-23 package.

LM34919C-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Topology Buck Iout (max) (A) 0.6 Vin (max) (V) 50 Vin (min) (V) 4.5 Vout (max) (V) 45 Vout (min) (V) 2.5 Features Adjustable soft start, Enable, Power good Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0022 Duty cycle (max) (%) 99
Rating Automotive Topology Buck Iout (max) (A) 0.6 Vin (max) (V) 50 Vin (min) (V) 4.5 Vout (max) (V) 45 Vout (min) (V) 2.5 Features Adjustable soft start, Enable, Power good Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0022 Duty cycle (max) (%) 99
WSON (DNT) 12 16 mm² (4 mm × 4 mm) DSBGA (YZR) 12 3.9375 mm² (— mm × — mm)
  • AEC-Q100 qualified (Tj = –40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
  • Input Voltage Range: 4.5 V to 50 V
  • Integrated N-Channel buck switch
  • Integrated Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with
    Load Current and Input Voltage
  • Adjustable Output Voltage
  • Power Good Output
  • Enable Input
  • Valley Current Limit at 0.64 A Typical
  • Precision Internal Voltage Reference
  • Low IQ Shutdown (<10 µA)
  • Highly Efficient Operation
  • Thermal Shutdown
  • 12-Bump 2 mm × 2 mm DSBGA and 12-pin 4
    mm × 4 mm WSON Packages
  • AEC-Q100 qualified (Tj = –40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
  • Input Voltage Range: 4.5 V to 50 V
  • Integrated N-Channel buck switch
  • Integrated Start-Up Regulator
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with
    Load Current and Input Voltage
  • Adjustable Output Voltage
  • Power Good Output
  • Enable Input
  • Valley Current Limit at 0.64 A Typical
  • Precision Internal Voltage Reference
  • Low IQ Shutdown (<10 µA)
  • Highly Efficient Operation
  • Thermal Shutdown
  • 12-Bump 2 mm × 2 mm DSBGA and 12-pin 4
    mm × 4 mm WSON Packages

The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. 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: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.

The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. 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: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM34919C-Q1 Ultra Small 50V, 600mA Const On-Time Buck Switchg Reg datasheet (Rev. A) 2013/12/12

設計與開發

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開發板

LM34919CQTLEVM — LM34919C-Q1 50V、600 mA 寬輸入電壓恆定導通時間降壓式切換穩壓器評估模組

The LM34919CQTLEVM 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 4.5V to 50V. The circuit delivers load currents to 600 mA, with (...)

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模擬型號

LM34919C-Q1 PSpice Transient Model (Rev. A)

SNVM638A.ZIP (63 KB) - PSpice 模型
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LM34919C-Q1 Unencrypted PSpice Transient Model (Rev. A)

SNVM979A.ZIP (3 KB) - PSpice 模型
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參考設計

TIDA-00098 — Aptina™ 車用攝影機模組參考設計

此參考設計為配備 Aptina 影像感測器和處理器及 TI FPD-Link III 序列器的車用攝影機模組解決方案。此模組配備 AR0132AT 1.2Mp 影像感測器、Aptina 的 AP0101AT 影像訊號處理器 (ISP)，以及德州儀器的 LM34919C、TPS62231 降壓穩壓器和 DS90UB913A-Q1 FPD-Link III 序列器。這種組合可提供精巧的雙板車用攝影機解決方案。攝影機數據/控制訊號傳輸和輸入電源只需要一根同軸電纜。

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參考設計

TIDA-00223 — 車用同軸音訊 I2S D 類音訊放大器參考設計

此參考設計是基於 I²S/TDM 的低成本、易於使用的光纖/類比銅線替代方案，用於將汽車（聲音）控制面板連接至輸出級/功率放大器。支援 I²S 及 TDM，能夠將數位音訊訊號傳輸至 16 個獨立通道，且每個通道在 4Ω 時輸出 80W。此外也透過單一屏蔽雙絞線 (STP) 或同軸電纜，經由 I²C 與控制單元或處理器進行雙向通訊。此外，TIDA-00223 參考設計可快速實作，隨附電源供應器，並且具備現代汽車所需的所有保護和診斷需求。

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WSON (DNT) 12 Ultra Librarian
DSBGA (YZR) 12 Ultra Librarian
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