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LM3489

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具有使能引腳的滯環(huán) PFET 降壓控制器

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功能與比較器件相同，但引腳排列有所不同
LM25148 正在供貨 具有超低 IQ 的 42V 同步降壓直流/直流控制器 Improved EMI performance with QFN package and dual random spread spectrum.

產(chǎn)品詳情

Rating Catalog Topology Buck Controller Iout (max) (A) 4 Vin (max) (V) 35 Vin (min) (V) 4.5 Vout (max) (V) 35 Vout (min) (V) 1.239 Control mode Hysteretic Features Enable Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 280 Duty cycle (max) (%) 100 Number of phases 1
Rating Catalog Topology Buck Controller Iout (max) (A) 4 Vin (max) (V) 35 Vin (min) (V) 4.5 Vout (max) (V) 35 Vout (min) (V) 1.239 Control mode Hysteretic Features Enable Operating temperature range (°C) -40 to 125 Iq (typ) (μA) 280 Duty cycle (max) (%) 100 Number of phases 1
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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類型 標(biāo)題 下載最新的英語版本 日期
* 數(shù)據(jù)表 LM3489x Hysteretic PFET Buck Controller With Enable Pin 數(shù)據(jù)表 (Rev. C) PDF | HTML 2016年 12月 16日
白皮書 USB Type-C 和 USB 電力傳輸電源路徑設(shè)計(jì)注意事項(xiàng) (Rev. A) 英語版 (Rev.A) 2020年 9月 1日
選擇指南 電源管理指南 2018 (Rev. K) 2018年 7月 31日
選擇指南 電源管理指南 2018 (Rev. R) 2018年 6月 25日
模擬設(shè)計(jì)期刊 Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016年 7月 21日
用戶指南 AN-1471 LM3489 Demonstration Board (Rev. A) 2013年 4月 25日

設(shè)計(jì)和開發(fā)

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評估板

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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 (...)

用戶指南: PDF
TI.com 上無現(xiàn)貨
評估板

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TPS65981EVM 是一款適用于 USB Type-C 和電力輸送應(yīng)用的完整參考設(shè)計(jì)，具有可變直流/直流架構(gòu)的特性，可優(yōu)化電路板布局布線并更大限度地降低 BOM 成本。? 此外，與 DP-EXPANSION-EVM 配合使用時，用戶可模擬功能齊全的 USB Type-C PD 主機(jī)或設(shè)備。
用戶指南: PDF
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仿真模型

LM3489 PSpice Transient Model

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

LM3489 Unencrypted PSpice Transient Model

SNVM714.ZIP (2 KB) - PSpice Model
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封裝 引腳 CAD 符號、封裝和 3D 模型
VSSOP (DGK) 8 Ultra Librarian

訂購和質(zhì)量

包含信息：
  • RoHS
  • REACH
  • 器件標(biāo)識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續(xù)可靠性監(jiān)測
包含信息：
  • 制造廠地點(diǎn)
  • 封裝廠地點(diǎn)

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