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AC/DC 和 DC/DC 转换器（集成 FET）

LM20125

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具有可选汽车级的 2.95V 至 5.5V、5A、电流模式同步降压稳压器

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LM20125

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产品详情

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 5 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 5 Iq (typ) (µA) 3500 Duty cycle (max) (%) 85
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 5 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 5 Iq (typ) (µA) 3500 Duty cycle (max) (%) 85
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • LM20125Q is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Efficiency with 500 kHz Switching Frequency
  • 32 mΩ Integrated FET Switches
  • Starts up into Pre-Biased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Output Voltage Down to 0.8V
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal Shutdown
  • HTSSOP 16-Pin Exposed Pad Package

All trademarks are the property of their respective owners.

  • LM20125Q is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Efficiency with 500 kHz Switching Frequency
  • 32 mΩ Integrated FET Switches
  • Starts up into Pre-Biased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Output Voltage Down to 0.8V
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal Shutdown
  • HTSSOP 16-Pin Exposed Pad Package

All trademarks are the property of their respective owners.

The LM20125 is a full featured 500 kHz synchronous buck regulator capable of delivering up to 5A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low 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. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20125 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 LM20125 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 LM20125 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

The LM20125 is a full featured 500 kHz synchronous buck regulator capable of delivering up to 5A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low 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. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20125 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 LM20125 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 LM20125 is offered in a 16-pin HTSSOP package with an exposed pad 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 LM20125/LM20125Q 5A, 500kHz PowerWise ® Synchronous Buck Regulator 数据表 (Rev. E) 2013年 3月 27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-1687 LM20125 Evaluation Board (Rev. B) 2013年 5月 3日
应用手册 AN-1752 5A LM20k Reference Designs (Rev. C) 2013年 5月 3日
应用手册 AN-2077 LM20k POL Module (Rev. A) 2013年 5月 3日
应用手册 Power Supply Design Considerations for Modern FPGAs 2010年 2月 2日
EVM 用户指南 AN-1687 LM20125 Evaluation Board (Rev. A) 2007年 10月 30日

设计和开发

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评估板

LM20125EVAL — 5A，500kHz PowerWise® 同步降压稳压器评估模块

The LM20125 is a full featured buck switching regulator capable of driving up to 5A of load current. The nominal 500 kHz switching frequency of the LM20125 reduces the size of the power stage components while still allowing for highly efficient operation. The LM20125 is capable of converting an (...)

用户指南: PDF
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仿真模型

LM20125 TINA-TI Average Reference Design

SNVM627.TSC (1008 KB) - TINA-TI Reference Design
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仿真模型

LM20125 TINA-TI Average Spice Model

SNVM626.ZIP (8 KB) - TINA-TI Spice Model
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仿真模型

LM20125 TINA-TI Transient Reference Design

SNVM629.TSC (53 KB) - TINA-TI Reference Design
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仿真模型

LM20125 TINA-TI Transient Spice Model

SNVM628.ZIP (11 KB) - TINA-TI Spice Model
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计算工具

LM20125DESIGN-CALC — LM20125 设计电子表格

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封装 引脚 CAD 符号、封装和 3D 模型
HTSSOP (PWP) 16 Ultra Librarian
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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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