产品详细信息

Vin (Min) (V) 2.97 Vin (Max) (V) 40 Vout (Min) (V) 1.26 Vout (Max) (V) 500 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 2.7 Features Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Pre-Bias Start-Up Duty cycle (Max) (%) 100 Rating Catalog Operating temperature range (C) -40 to 125
Vin (Min) (V) 2.97 Vin (Max) (V) 40 Vout (Min) (V) 1.26 Vout (Max) (V) 500 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 2.7 Features Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Pre-Bias Start-Up Duty cycle (Max) (%) 100 Rating Catalog Operating temperature range (C) -40 to 125
VSSOP (DGK) 8 15 mm² 3 x 4.9
  • 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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类型 标题 下载最新的英文版本 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) 2015年 7月 6日
应用手册 LM34xx How to Design Flyback Converter with LM3481 Boost Controller (Rev. A) 2019年 4月 8日
技术文章 How to add overvoltage protection to a synchronous boost controller 2018年 9月 17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
应用手册 Softstart Using Constant Current Constant Voltage Approach 2015年 7月 24日
技术文章 Portable speaker power: Making the bass possible 2015年 5月 12日
应用手册 Demystifying Type II and Type III Compensators Using Op-Amp and OTA for DC/DC Co 2014年 7月 11日
用户指南 AN-1204 LM3478/LM3488 Evaluation Board (Rev. A) 2013年 10月 30日
用户指南 AN-1193 LM3477 Evaluation Board (Rev. E) 2013年 4月 29日
应用手册 AN-1286 Compensation For The LM3478 Boost Controller (Rev. C) 2013年 4月 23日
应用手册 AN-1484 Designing A SEPIC Converter (Rev. E) 2013年 4月 23日
应用手册 AN-1990 Compensation for Current Mode Control SEPIC Converters (Rev. A) 2013年 4月 23日
应用手册 Modeling & Design of Current Mode Control Boost Converters (Rev. B) 2013年 4月 23日
应用手册 Application Note 1286 Compensation For The LM3478 Boost Controller (cn) 2009年 5月 19日
应用手册 Application Note 1484 Designing A SEPIC Converter (cn) 2008年 4月 30日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

仿真模型

LM3488 Unencrypted PSpice Transient Model (Rev. B)

SNVMAX0B.ZIP (5 KB) - PSpice Model
仿真模型

LM3488 PSpice Transient Model (Rev. A)

SNVMAX1A.ZIP (96 KB) - PSpice Model
仿真工具

PSPICE-FOR-TI — PSPICE® for TI design and simulation tool

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。 

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
计算工具

FLYBUCK-FLYBACK-DESIGN-CALC — Fly-Buck 和反激式拓扑选择器

该工具可帮助电源工程师基于规格选择正确的隔离式直流-直流拓扑。根据所选择的拓扑,计算器还会针对设计建议正确的 IC。
参考设计

TIDA-010057 — Ultrasound smart probe power supply reference design

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 (...)
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  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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