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LM3488

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适用于开关稳压器的 2.97V 至 40V 宽输入电压低侧 N 沟道控制器

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LM5155 正在供货 2.2MHz 宽输入电压、1.5A MOSFET 驱动器、非同步升压控制器 Up to 2.2-MHz Fsw, higher efficiency and up to 45-V input operating voltage.

LM3488

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产品详情

Rating Catalog Topology Boost, Flyback, Forward, SEPIC Vin (max) (V) 40 Vin (min) (V) 2.97 Vout (max) (V) 500 Vout (min) (V) 1.26 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light-load efficiency, Nonsynchronous rectification, Prebias startup Duty cycle (max) (%) 100 Iq (typ) (A) 0.0027 Operating temperature range (°C) -40 to 125
Rating Catalog Topology Boost, Flyback, Forward, SEPIC Vin (max) (V) 40 Vin (min) (V) 2.97 Vout (max) (V) 500 Vout (min) (V) 1.26 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light-load efficiency, Nonsynchronous rectification, Prebias startup Duty cycle (max) (%) 100 Iq (typ) (A) 0.0027 Operating temperature range (°C) -40 to 125
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Automotive Grade Product, AEC-Q100 Qualified
  • 8-Lead VSSOP Package
  • Internal Push-Pull Driver With 1-A Peak Current Capability
  • Current Limit and Thermal Shutdown
  • Frequency Compensation Optimized With a Capacitor and a Resistor
  • Internal Soft-Start
  • Current Mode Operation
  • Undervoltage Lockout With Hysteresis
  • Key Specifications:
    • Wide Supply Voltage Range of 2.97 V to 40 V
    • 100-kHz to 1-MHz Adjustable and Synchronizable Clock Frequency
    • ±1.5% (Overtemperature) Internal Reference
    • 5-µA Shutdown Current (Overtemperature)
  • Create a Custom Design Using the LM3488 with the WEBENCH Power Designer
  • Automotive Grade Product, AEC-Q100 Qualified
  • 8-Lead VSSOP Package
  • Internal Push-Pull Driver With 1-A Peak Current Capability
  • Current Limit and Thermal Shutdown
  • Frequency Compensation Optimized With a Capacitor and a Resistor
  • Internal Soft-Start
  • Current Mode Operation
  • Undervoltage Lockout With Hysteresis
  • Key Specifications:
    • Wide Supply Voltage Range of 2.97 V to 40 V
    • 100-kHz to 1-MHz Adjustable and Synchronizable Clock Frequency
    • ±1.5% (Overtemperature) Internal Reference
    • 5-µA Shutdown Current (Overtemperature)
  • Create a Custom Design Using the LM3488 with the WEBENCH Power Designer

The LM3488 is a versatile low-side N-FET high-performance controller for switching regulators. This device is suitable for use in topologies requiring low-side FET, such as boost, flyback, or SEPIC. Moreover, the LM3488 can be operated at extremely high switching frequency to reduce the overall solution size. The switching frequency of LM3488 can be adjusted to any value from 100 kHz to 1 MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.

The LM3488 has built-in features such as thermal shutdown, short-circuit protection, and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.

The LM3488 is a versatile low-side N-FET high-performance controller for switching regulators. This device is suitable for use in topologies requiring low-side FET, such as boost, flyback, or SEPIC. Moreover, the LM3488 can be operated at extremely high switching frequency to reduce the overall solution size. The switching frequency of LM3488 can be adjusted to any value from 100 kHz to 1 MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.

The LM3488 has built-in features such as thermal shutdown, short-circuit protection, and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.
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技术文档

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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 LM3488/-Q1 Automotive High-Efficiency Controller for Boost, SEPIC and Fly-Back DC-DC Converters 数据表 (Rev. O) PDF | HTML 2015-7-6
应用手册 AN-1286 Compensation for the LM3478 Boost Controller (Rev. D) PDF | HTML 2022-8-9
应用手册 LM34xx How to Design Flyback Converter with LM3481 Boost Controller (Rev. A) 2019-4-8
选择指南 电源管理指南 2018 2018-7-31
应用手册 Softstart Using Constant Current Constant Voltage Approach 2015-7-24
技术文章 Portable speaker power: Making the bass possible PDF | HTML 2015-5-12
应用手册 Demystifying Type II and Type III Compensators Using Op-Amp and OTA for DC/DC Co 2014-7-11
应用手册 AN-1484 Designing A SEPIC Converter (Rev. E) 2013-4-23
应用手册 AN-1990 Compensation for Current Mode Control SEPIC Converters (Rev. A) 2013-4-23
应用手册 Modeling & Design of Current Mode Control Boost Converters (Rev. B) 2013-4-23
应用手册 Application Note 1286 Compensation For The LM3478 Boost Controller (cn) 2009-5-19
应用手册 Application Note 1484 Designing A SEPIC Converter (cn) 2008-4-30

设计与开发

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仿真模型

LM3488 PSpice Transient Model (Rev. A)

SNVMAX1A.ZIP (96 KB) - PSpice 模型
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仿真模型

LM3488 Unencrypted PSpice Transient Model (Rev. B)

SNVMAX0B.ZIP (5 KB) - PSpice 模型
支持的产品和硬件
计算工具

FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator

该工具可帮助电源工程师根据规范选择合适的隔离式 DC-DC 拓扑。根据所选的拓扑，计算器还会针对设计推荐合适的 IC。

支持的产品和硬件
计算工具

LM3478-88-BOOST-CALC — LM3478-88 quick start calculator for boost

LM3478-88 quick start calculator for boost topology
支持的产品和硬件
计算工具

LM3478-88-FLYBACK-CALC — LM3478-88 quick start calculator for Flyback

The LM3478-88 Flyback quick start calculator tool assists in the configuration of the power stage and the external components for the LM3478 and LM3488 devices
支持的产品和硬件
计算工具

LM3478-88-SEPIC-CALC — LM3478-88 quick start calculator for SEPIC

The LM3478-88 SEPIC quick start calculator tool assists in the configuration of the power stage and the external components for the LM3478 and LM3488.
支持的产品和硬件
参考设计

TIDA-010057 — 超声波智能探头电源参考设计

医疗成像领域的巨大技术进步和高集成度，特别是手持式超声波智能探头的出现，促使工程师开发出高效率、抗噪声的小尺寸电源解决方案。此参考设计阐述了端到端电源和数据解决方案，适用于我们采用 TX7332 发送芯片和 AFE5832LP 接收芯片的高性能 128 通道 Tx/64 通道 Rx 超声波智能探头。通过 5V USB Type-C™ 输入，电源树可生成用于发送的单级无变压器高压（高达 +/-80V，并且高度小于 5mm）以及用于 AFE 和 FPGA 的负载点低压。此设计可实现低噪声（纹波电压小于 10mV）高效电源轨并提高热性能（温升小于 10°C），从而实现系统效率高达 (...)
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封装 引脚 CAD 符号、封装和 3D 模型
VSSOP (DGK) 8 Ultra Librarian
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