LM20242

正在供貨

4.5-36V 2A 電流模式可調頻率同步降壓穩壓器

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TLVM13620 正在供貨 采用 4mm x 6mm x 1.8mm 封裝的 3.6V 至 36V 輸入、1V 至 6V 輸出、2A 降壓模塊 Save board space, simplify design and speed time to market with an integrated-inductor power module.

產品詳情

Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 36 Vin (min) (V) 4.5 Vout (max) (V) 32 Vout (min) (V) 0.8 Features Enable, Overcurrent protection, Power good, Pre-bias startup, Synchronous rectification, Tracking Control mode current mode Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 2000 Duty cycle (max) (%) 90 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 36 Vin (min) (V) 4.5 Vout (max) (V) 32 Vout (min) (V) 0.8 Features Enable, Overcurrent protection, Power good, Pre-bias startup, Synchronous rectification, Tracking Control mode current mode Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 2000 Duty cycle (max) (%) 90 Type Converter
HTSSOP (PWP) 20 41.6 mm2 6.5 x 6.4
  • 2A Output Current, 3.7A Peak Current
  • 130 m?/110 m? Integrated Power MOSFETs
  • 1.5% Output Voltage Accuracy
  • Current Mode Control, Selectable Compensation
  • Resistor Programmed, 1MHz Capable Oscillator
  • Synchronous Rectifier with Diode Emulation
  • Adjustable Output Voltage Down to 0.8V
  • Compatible with Pre-Biased Loads
  • Programmable Soft-Start With External Capacitor
  • Precision Enable Pin with Hysteresis
  • OVP, UVLO Inputs and PGOOD Output
  • Internally Protected with Peak Current Limit, Thermal Shutdown and Restart
  • Accurate Current Limit with Frequency Foldback
  • Non-Linear Current Mode Slope Compensation
  • HTSSOP Exposed Pad Package

PowerWise is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

  • 2A Output Current, 3.7A Peak Current
  • 130 m?/110 m? Integrated Power MOSFETs
  • 1.5% Output Voltage Accuracy
  • Current Mode Control, Selectable Compensation
  • Resistor Programmed, 1MHz Capable Oscillator
  • Synchronous Rectifier with Diode Emulation
  • Adjustable Output Voltage Down to 0.8V
  • Compatible with Pre-Biased Loads
  • Programmable Soft-Start With External Capacitor
  • Precision Enable Pin with Hysteresis
  • OVP, UVLO Inputs and PGOOD Output
  • Internally Protected with Peak Current Limit, Thermal Shutdown and Restart
  • Accurate Current Limit with Frequency Foldback
  • Non-Linear Current Mode Slope Compensation
  • HTSSOP Exposed Pad Package

PowerWise is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

The LM20242 is a full featured 1MHz capable synchronous buck regulator capable of delivering up to 2A of load current. The current mode control loop is externally compensated with only two external components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high voltage systems.

The device features internal Over Voltage Protection (OVP) and Over Current Protection (OCP) circuits for increased system reliability. A precision Enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated PGOOD circuit.

The LM20242 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20242 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20242 is offered in an exposed pad 20 pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.

The LM20242 is a full featured 1MHz capable synchronous buck regulator capable of delivering up to 2A of load current. The current mode control loop is externally compensated with only two external components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high voltage systems.

The device features internal Over Voltage Protection (OVP) and Over Current Protection (OCP) circuits for increased system reliability. A precision Enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated PGOOD circuit.

The LM20242 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20242 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20242 is offered in an exposed pad 20 pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.
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類型 標題 下載最新的英語版本 日期
* 數據表 LM20242 36V, 2A PowerWise ? Adjustable Frequency Synchronous Buck Regulator 數據表 (Rev. E) 2013年 3月 28日
選擇指南 電源管理指南 2018 (Rev. K) 2018年 7月 31日
選擇指南 電源管理指南 2018 (Rev. R) 2018年 6月 25日
EVM 用戶指南 AN-1694 LM20242 Evaluation Board (Rev. B) 2013年 5月 5日
應用手冊 AN-2077 LM20k POL Module (Rev. A) 2013年 5月 3日
用戶指南 LM20242 Demonstration Board User Guide 2012年 1月 27日

設計和開發

如需其他信息或資源，請點擊以下任一標題進入詳情頁面查看（如有）。

評估板

LM20242EVAL — 36V，2A PowerWise® 可調節頻率同步降壓穩壓器評估模塊

The LM20242 synchronous rectifier Buck evaluation board is designed to provide the design engineer with a fully functional Buck power converter based on Current Mode Control to evaluate the LM20242 switching regulator IC. The evaluation board provides a 3.3V output with 2A current capability. The (...)

用戶指南: PDF
TI.com 上無現貨
CAD/CAE 符號

LM20242 Demonstration Board CAD File

SNVC015.ZIP (436 KB)
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計算工具

LM20242DESIGN-CALC — LM20242 計算器電子表格

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參考設計

PMP4494 — 具有 200ms 輸出電壓保持時間的 5V 至 3.3V、1.2A DC-DC 轉換器電路參考設計

PMP4494 是一款具有 Vout 保持電路的 5V 至 3.3V、1.2A DC-DC 轉換器。該設計采用同步降壓轉換器 LM20242 來為系統電壓提供高效率。升壓轉換器 TPS61170 可將輔助軌從 10V 升壓到 20V，以提供備用電壓。電源電壓監控器 TLV809 可監控系統電壓，并在系統電壓低于閾值電壓后將電源切換到備用電壓。結合升壓電路，在仍滿足 200mS 保持時間規格的同時，保持電容顯著減小。
測試報告: PDF
原理圖: PDF
封裝 引腳 CAD 符號、封裝和 3D 模型
HTSSOP (PWP) 20 Ultra Librarian

訂購和質量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續可靠性監測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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