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LM3489

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具有使能引脚的滞环 PFET 降压控制器

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产品详情

Vin (min) (V) 4.5 Vin (max) (V) 35 Vout (min) (V) 1.239 Vout (max) (V) 35 Iout (max) (A) 4 Iq (typ) (mA) 0.28 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1400 Features Enable Operating temperature range (°C) -40 to 125 Regulated outputs (#) 1 Number of phases 1 Rating Catalog Control mode Hysteretic Type Controller
Vin (min) (V) 4.5 Vin (max) (V) 35 Vout (min) (V) 1.239 Vout (max) (V) 35 Iout (max) (A) 4 Iq (typ) (mA) 0.28 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1400 Features Enable Operating temperature range (°C) -40 to 125 Regulated outputs (#) 1 Number of phases 1 Rating Catalog Control mode Hysteretic Type Controller
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Qualified for Automotive Parts
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • Easy-to-Use Control Methodology
  • No Control Loop Compensation Required
  • Wide 4.5-V to 35-V Input Range
  • 1.239 V to VIN Adjustable Output Range
  • High Efficiency: 93%
  • ±1.3% (±2% Over Temperature) Internal Reference
  • 100% Duty Cycle Operation
  • Maximum Operation Frequency > 1 MHz
  • Current Limit Protection
  • Dedicated Enable Pin (on if Unconnected)
  • Shutdown Mode Draws Only 7-µA Supply Current
  • 8-Pin VSSOP Package
  • Qualified for Automotive Parts
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • Easy-to-Use Control Methodology
  • No Control Loop Compensation Required
  • Wide 4.5-V to 35-V Input Range
  • 1.239 V to VIN Adjustable Output Range
  • High Efficiency: 93%
  • ±1.3% (±2% Over Temperature) Internal Reference
  • 100% Duty Cycle Operation
  • Maximum Operation Frequency > 1 MHz
  • Current Limit Protection
  • Dedicated Enable Pin (on if Unconnected)
  • Shutdown Mode Draws Only 7-µA Supply Current
  • 8-Pin VSSOP Package

The LM3489 device is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost-effective, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. A dedicated enable pin provides a shutdown mode drawing only 7 µA. Leaving the enable pin unconnected defaults to on.

Current limit protection can be implemented by measuring the voltage across the PFET’s RDS(ON), thus eliminating the need for a sense resistor. A sense resistor may be used to improve current limit accuracy if desired. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

The LM3489 device is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost-effective, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. A dedicated enable pin provides a shutdown mode drawing only 7 µA. Leaving the enable pin unconnected defaults to on.

Current limit protection can be implemented by measuring the voltage across the PFET’s RDS(ON), thus eliminating the need for a sense resistor. A sense resistor may be used to improve current limit accuracy if desired. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

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类型 标题 下载最新的英语版本 日期
* 数据表 LM3489x Hysteretic PFET Buck Controller With Enable Pin 数据表 (Rev. C) PDF | HTML 2016年 12月 16日
白皮书 USB Type-C 和 USB 电力传输电源路径设计注意事项 (Rev. A) 英语版 (Rev.A) 2020年 9月 1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
模拟设计期刊 Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
用户指南 AN-1471 LM3489 Demonstration Board (Rev. A) 2013年 4月 25日

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评估板

LM3489EVAL — 具有使能端引脚的滞后 PFET 降压控制器

The LM3489 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost effective, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability (...)

用户指南: PDF
TI.com 上无现货
评估板

TPS65981EVM — TPS65981 USB Type-C™ 和 USB PD 控制器、电源开关和高速多路复用器 EVM

TPS65981EVM 是一款适用于 USB Type-C 和电力输送应用的完整参考设计,具有可变直流/直流架构的特性,可优化电路板布局并最大限度地降低 BOM 成本。此外,与 DP-EXPANSION-EVM 配合使用时,用户可仿真功能齐全的 USB Type-C PD 主机或器件。
用户指南: PDF
TI.com 上无现货
仿真模型

LM3489 PSpice Transient Model

SNVM474.ZIP (28 KB) - PSpice Model
仿真模型

LM3489 Unencrypted PSpice Transient Model

SNVM714.ZIP (2 KB) - PSpice Model
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

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。

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VSSOP (DGK) 8 查看选项

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

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