L3751

批量生产
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6 V至75 V的宽输入电压同步降压控制器

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产品概述

描述

The 6 V to 75 V wide input voltage range L3751 synchronous buck controller features extreme voltage conversion ratio over switching frequency range (100 kHz - 1 MHz) thanks to 40 ns minimum conduction time.

The diode emulation (DEM) implements pulse skipping mode that maximizes the efficiency at light-load giving controlled output voltage ripple. The forced PWM (FPWM) over the load range makes the switching frequency constant and minimizes the output voltage ripple.

The Power Good open collector output validates the regulated output voltage for monitoring and it is useful to implement output voltage sequencing for digital ICs during the power-up phase.

An embedded gate driver minimizes the number of external components and it is designed for standard VTH MOSFET.

Embedded protections–output overcurrent, input voltage UVLO, internal voltage monitoring, thermal shutdown - feature controlled and safe operation for critical environments in telecom, networking and industrial applications.

The device is available in a QFN 20 leads 3.5 x 4.5 mm package with wettable flanks.

  • 所有功能

    • Wide 6 V to 75 V input voltage range
    • Adjustable output voltage from 0.8 V to 60 V
    • 100 kHz - 1 MHz switching frequency range
    • 40 ns minimum on-time for extreme duty ratio
    • Low dropout operation during line transient
    • Adjustable soft-start or input voltage tracking
    • Pulse skipping or forced PWM operation at light load
    • Synchronization
    • Adjustable precision enable
    • Power Good open collector output validates VOUT
    • 7.5 V gate drivers for standard VTH MOSFETs
    • Constant current protection with hiccup mode
    • Precision or lossless programmable current sensing
    • Improved line transient response
    • Input voltage undervoltage lockout
    • Internal voltage monitoring
    • Thermal protection
    • Operating junction temperature range: -40 °C to 150 °C
    阅读更多 阅读较少信息

eDesignSuite

eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Power Management Design Center

Thermal-electrical Simulators for Components

Signal Conditioning Design Tool

NFC/RFID Calculators

Choose design tool:
Power Management Design Center

Power Supply Design Tool

• SMPS design, by topology, by type and by product
• PFC design with analog and digitial control
• Supports various PCB configurations
Choose type:
DC/DC
AC/DC
太阳能电池充电器
Power Management Design Center

LED Lighting Design Tool

• Handles AC-DC and DC-DC design in common topologies
• Displays interactive and annotated schematic
• Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
Choose type:
DC/DC
AC/DC
Power Management Design Center

Digital Power Workbench

• Provides a step-by-step optimized design of power section and control loop
• Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs
Power Management Design Center

Power Tree Designer

• Specify input/output power for each node in the tree
• Check for consistency
• Design each individual node
Choose design tool:
Thermal-electrical Simulators for Components

AC Switches Simulator

• Select ratings and application waveforms
• Get junction temperature and blocking voltage graphs
• Search and sort suitable devices
Thermal-electrical Simulators for Components

Rectifier Diodes Simulator

• Select ratings and application waveforms
• Estimate power losses
• Search and sort suitable devices
Thermal-electrical Simulators for Components

STPOWER Studio

• Supports long mission profiles
• Provides power loss and temperature graphs
• Helps define heatsink thermal properties
Thermal-electrical Simulators for Components

Twister Sim

• Help select the right ViPOWER Automotive power device
• Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
• Supports various PCB configurations
Thermal-electrical Simulators for Components

TVS Simulator

• Specify system ratings and surge waveform
• Search and sort suitable devices
Thermal-electrical Simulators for Components

Estimate

• Build simple schematics and firmware inputs in minutes
• Quickly generate reliable estimates of battery life, system power consumption and bill of materials costs
Thermal-electrical Simulators for Components

PCB Thermal Simulator

• Thermal analysis of a PCB from Gerber files.
• Possibility to add heat sources, heat sinks, copper areas and thermal paths.
• Powerful server-side engine for rendering and simulation.
• Thermal results shown graphically via 2D table.
Choose design tool:
Signal Conditioning Design Tool

Active Filters

• Handles multi-stage-designs and common topologies
• Returns circuit component values
• Provides gain, phase and group delay graphs
• Low Pass, High Pass and Band Pass
Signal Conditioning Design Tool

Comparators

• Handles most common configurations
• Returns circuit components values
• Provides I/O signal waveforms
• Inverting, Non Inverting, Window
Signal Conditioning Design Tool

Low side Current Sensing

• Returns circuit component values
• Provides current error graphs
Signal Conditioning Design Tool

High side Current Sensing

• Provides current error graphs.
• Help to select the right High side current sensing and shunt devices.
Choose design tool:
NFC/RFID Calculators

NFC Inductance

• Input geometry and substrate properties
• Get antenna impedance
NFC/RFID Calculators

UHF Link Budget

• Enter forward and reverse link characteristics
• The tool returns link budget estimate
NFC/RFID Calculators

NFC Tuning Circuit

• Enter antenna parameter and matching target
• Select the topology of the matching network
• The tool returns component values for the desired design targets

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特别推荐

技术公告
L3751：6 V至75 V的宽输入电压同步降压控制器
阅读更多

EDA符号、封装和3D模型

意法半导体 - L3751

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Please select one model supplier :

Start your design with UltraLibrarian
Start your design with SamacSys
Symbols

符号

Footprints

封装

3D model

3D模型

所有资源

资源标题
版本
更新时间

SIMPLIS models (1)

资源标题
版本
更新时间
L3751 SIMPLIS example schematics
2024.07 08 Jul 2024
08 Jul 2024
L3751 SIMPLIS example schematics 2024.07

质量与可靠性

产品型号 Marketing Status 包 等级规格 符合RoHS级别 Longevity Commitment Longevity Starting Date 材料声明**
L3751PUR
批量生产
QFN 3.5X4.5X1.0 20L PITCH 0.50 工业 Ecopack2 10 2023-06-06T00:00:00.000+02:00

L3751PUR

Package:

QFN 3.5X4.5X1.0 20L PITCH 0.50

Material Declaration**:

PDF XML
More Info

Marketing Status

批量生产

Package

QFN 3.5X4.5X1.0 20L PITCH 0.50

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。

样片和购买

(*) 建议转售单价（美元）仅用于预算用途。如需以当地货币计价的报价，请联系您当地的 ST销售办事处 或我们的 经销商。

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