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AC/DC & DC/DC converters (integrated FET)

LM20242

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4.5-36V 2A 电流模式可调频率同步降压稳压器

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TLVM13620 正在供货 采用 4mm x 6mm x 1.8mm 封装的 3.6V 至 36V 输入、1V 至 6V 输出、2A 降压模块 Save board space, simplify design and speed time to market with an integrated-inductor power module.

LM20242

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产品详情

Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 36 Type Converter Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 32 Rating Catalog Operating temperature range (°C) -40 to 125
Iout (max) (A) 2 Vin (min) (V) 4.5 Vin (max) (V) 36 Type Converter Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 1000 Features Enable, Over Current Protection, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 32 Rating Catalog Operating temperature range (°C) -40 to 125
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • 2A Output Current, 3.7A Peak Current
  • 130 mΩ/110 mΩ 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 mΩ/110 mΩ 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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类型 标题 下载最新的英语版本 日期
* 数据表 LM20242 36V, 2A PowerWise ® Adjustable Frequency Synchronous Buck Regulator 数据表 (Rev. E) 2013年 3月 28日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
EVM 用户指南 AN-1694 LM20242 Evaluation Board (Rev. B) 2013年 5月 5日
应用手册 AN-2077 LM20k POL Module (Rev. A) 2013年 5月 3日
用户指南 LM20242 Demonstration Board User Guide 2012年 1月 27日

设计和开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

LM20242EVAL — 36V，2A PowerWise® 可调节频率同步降压稳压器评估模块

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 (...)

用户指南: PDF
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CAD/CAE 符号

LM20242 Demonstration Board CAD File

SNVC015.ZIP (436 KB)
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计算工具

LM20242DESIGN-CALC — LM20242 计算器电子表格

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参考设计

PMP4494 — 具有 200ms Vout 保持时间电路的 5V 至 3.3V、1.2A DC-DC 转换器参考设计

PMP4494 是一款 5V 至 3.3V 1.2A 直流-直流转换器，具备输出电压保持电路。该设计运用了同步降压转换器 LM20242，旨在为系统电压提供高效率。升压转换器 TPS61170 将辅助轨从 10V 升至 20V，以提供备用电压。供电电压监控器 TLV809 监控系统电压，并在系统电压跌至阈值电压以下时，将供电电压切换至备用电压。保持电容与升压电路一起得以大幅减少，但仍然满足 200mS 保持时间的规格要求。
测试报告: PDF
原理图: PDF
封装 引脚 下载
HTSSOP (PWP) 20 查看选项
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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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