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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

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 Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.002 Duty cycle (max) (%) 90
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 Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.002 Duty cycle (max) (%) 90
HTSSOP (PWP) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • 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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顶层文档 类型 标题 格式选项 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) 2013-3-28
选择指南 电源管理指南 2018 2018-7-31
应用手册 AN-2077 LM20k POL Module (Rev. A) 2013-5-3
用户指南 LM20242 Demonstration Board User Guide 2012-1-27

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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 (...)

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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 输出电压保持时间的 5V 至 3.3V、1.2A DC-DC 转换器电路参考设计

PMP4494 是一款具有 Vout 保持电路的 5V 至 3.3V、1.2A DC-DC 转换器。该设计采用同步降压转换器 LM20242 来为系统电压提供高效率。升压转换器 TPS61170 可将辅助轨从 10V 升压到 20V，以提供备用电压。电源电压监控器 TLV809 可监控系统电压，并在系统电压低于阈值电压后将电源切换到备用电压。结合升压电路，在仍满足 200mS 保持时间规格的同时，保持电容显著减小。
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HTSSOP (PWP) 20 Ultra Librarian
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