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

LM20143

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具有调频功能的2.95V 至 5.5V、3A、电流模式同步降压稳压器

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TPS62813-Q1 正在供货 具有固定 Fsw 和 SYNC 并采用 2mm x 3mm 可湿性侧面封装的汽车类 2.75V 至 6V、3A 降压转换器 Improved performance: Fixed-frequency, spread-spectrum in smaller 2-mm x 3-mm QFN with wettable flanks.

LM20143

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产品详情

Iout (max) (A) 3 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 510 Switching frequency (max) (kHz) 1500 Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 5 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0035
Iout (max) (A) 3 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 510 Switching frequency (max) (kHz) 1500 Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 5 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0035
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • Available in AEC-Q100 Temperature Grade 1
  • Input Voltage Range: 2.95 V to 5.50 V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Peak Efficiency
  • Adjustable Output Voltage Down to 0.80 V
  • Adjustable Switching Frequency (500 kHz to 1.5
    MHz)
  • 32-mΩ Integrated FET Switches
  • Starts into Prebiased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal
    Shutdown
  • Available in AEC-Q100 Temperature Grade 1
  • Input Voltage Range: 2.95 V to 5.50 V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Peak Efficiency
  • Adjustable Output Voltage Down to 0.80 V
  • Adjustable Switching Frequency (500 kHz to 1.5
    MHz)
  • 32-mΩ Integrated FET Switches
  • Starts into Prebiased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal
    Shutdown

The LM20143 devices are full featured PowerWise™ adjustable frequency synchronous buck regulators capable of delivering up to 3 A 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 2.95 V to 5.5 V, 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 frequency of this device can be adjusted from 500 kHz to 1.5 MHz by connecting an external resistor from the RT pin to ground.

The LM20143 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 LM20143 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 LM20143 devices are full featured PowerWise™ adjustable frequency synchronous buck regulators capable of delivering up to 3 A 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 2.95 V to 5.5 V, 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 frequency of this device can be adjusted from 500 kHz to 1.5 MHz by connecting an external resistor from the RT pin to ground.

The LM20143 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 LM20143 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.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM20143/LM20143-Q1 3-A PowerWise™ AdjustableFrequency Synchronous Buck Regulator 数据表 (Rev. H) PDF | HTML 2016年 1月 5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-1691 LM20143 Evaluation Board (Rev. B) 2013年 5月 5日
应用手册 AN-1747 3A LM20k Reference Designs (Rev. A) 2013年 5月 3日
应用手册 AN-2077 LM20k POL Module (Rev. A) 2013年 5月 3日

设计和开发

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评估板

LM20143EVAL — 3A，PowerWise®：调节频率同步降压稳压器评估模块

The LM20143 is a full featured buck switching regulator capable of driving up to 3A of load current. The switching frequency of the LM20143 can be varied from 500kHz to 1.5Mhz with an external resistor allowing the size of the power stage components to be reduced while still providing efficient (...)

用户指南: PDF
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仿真模型

LM20143 PSpice Transient Model (Rev. A)

SNVM517A.ZIP (57 KB) - PSpice Model
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仿真模型

LM20143 Unencrypted PSpice Transient Model

SNVMAL2.ZIP (2 KB) - PSpice Model
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计算工具

LM20143DESIGN-CALC — LM20143 设计电子表格

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封装 引脚 下载
HTSSOP (PWP) 16 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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