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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM20143-Q1

現行

具可調整頻率的汽車級 2.95-5.5V、3A 電流模式同步降壓穩壓器

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
TPS62813-Q1 現行 具有固定 Fsw 和 SYNC 並採用 2 mm x 3 mm 可潤濕側翼封裝的車用 2.75V 至 6V、3A 降壓轉換器 Improved performance: Fixed-frequency, spread-spectrum in smaller 2-mm x 3-mm QFN with wettable flanks.

LM20143-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 2.95 Vin (max) (V) 5.5 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 Iq (typ) (µA) 3500 Duty cycle (max) (%) 85
Rating Automotive Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 2.95 Vin (max) (V) 5.5 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 Iq (typ) (µA) 3500 Duty cycle (max) (%) 85
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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類型 標題 日期
* Data sheet LM20143/LM20143-Q1 3-A PowerWise™ AdjustableFrequency Synchronous Buck Regulator datasheet (Rev. H) PDF | HTML 2016年 1月 5日
EVM User's guide AN-1691 LM20143 Evaluation Board (Rev. B) 2013年 5月 5日
Application note AN-1747 3A LM20k Reference Designs (Rev. A) 2013年 5月 3日
Application note AN-2077 LM20k POL Module (Rev. A) 2013年 5月 3日

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LM20143EVAL — 3A、PowerWise®: 可調整頻率同步降壓穩壓器評估模組

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 (...)

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LM20143 Unencrypted PSpice Transient Model

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LM20143DESIGN-CALC — LM20143 設計試算表

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