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线性和低压降 (LDO) 稳压器

LFC789D25

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双通道线性 FET 控制器

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LFC789D25

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Output options Adjustable Output, Dual output, Fixed Output Iout (max) (A) 3 Vin (max) (V) 16 Vin (min) (V) 9 Vout (max) (V) 2.5 Vout (min) (V) 2.5 Fixed output options (V) 2.5 Iq (typ) (mA) 2 Thermal resistance θJA (°C/W) 97 Rating Catalog Load capacitance (min) (µF) 0 Regulated outputs (#) 2 Accuracy (%) 2 Operating temperature range (°C) 0 to 70
Output options Adjustable Output, Dual output, Fixed Output Iout (max) (A) 3 Vin (max) (V) 16 Vin (min) (V) 9 Vout (max) (V) 2.5 Vout (min) (V) 2.5 Fixed output options (V) 2.5 Iq (typ) (mA) 2 Thermal resistance θJA (°C/W) 97 Rating Catalog Load capacitance (min) (µF) 0 Regulated outputs (#) 2 Accuracy (%) 2 Operating temperature range (°C) 0 to 70
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Two Independent Controllers for Regulation of:
    • Fixed 2.5-V and an Adjustable Output
    • ±2% (Max) Regulation Across Temperature and Load (1 mA to 3 A)
  • Adjustable Output Can Be Set Via an External Reference Pin, Allowing for the Creation of a Tracking Regulator
  • Great Design Flexibility With Minimal External Components
  • Applications: High-Current, Low-Dropout Regulators for:
    • DDR/RDRAM Memory Termination
    • Motherboards
    • Chipset I/O
    • GTLP Termination
  • Two Independent Controllers for Regulation of:
    • Fixed 2.5-V and an Adjustable Output
    • ±2% (Max) Regulation Across Temperature and Load (1 mA to 3 A)
  • Adjustable Output Can Be Set Via an External Reference Pin, Allowing for the Creation of a Tracking Regulator
  • Great Design Flexibility With Minimal External Components
  • Applications: High-Current, Low-Dropout Regulators for:
    • DDR/RDRAM Memory Termination
    • Motherboards
    • Chipset I/O
    • GTLP Termination

The LFC789D25 is a dual linear FET controller that simplifies the design of dual power supplies. The device consists of two independent controllers, each of which drives an external MOSFET to implement a low-dropout regulator. One controller is programmed to regulate a fixed 2.5-V output, while the second controller can be programmed to regulate any desired output voltage via a reference input pin, allowing for the creation of a tracking regulator often needed for termination schemes. And, because heating effects of the external FETs easily can be isolated from the controllers, the controllers can regulate the output voltages to a maximum tolerance of ±2% across temperature and load.

The LFC789D25 allows designers a great deal of flexibility in selecting external components and topology to implement their specific power-supply needs. With appropriate heat sinking, the designer can build a regulator with as much current capability as allowed by the external MOSFET and power supply. And, because the dropout of the regulator is simply the product of the RDS(on) of the external power MOSFET and the load current, very low dropout can be achieved via proper selection of the power MOSFET.

Packaged in 8-pin SOIC and space-saving TSSOP, the LFC789D25 is characterized for operation from 0°C to 70°C.

The LFC789D25 is a dual linear FET controller that simplifies the design of dual power supplies. The device consists of two independent controllers, each of which drives an external MOSFET to implement a low-dropout regulator. One controller is programmed to regulate a fixed 2.5-V output, while the second controller can be programmed to regulate any desired output voltage via a reference input pin, allowing for the creation of a tracking regulator often needed for termination schemes. And, because heating effects of the external FETs easily can be isolated from the controllers, the controllers can regulate the output voltages to a maximum tolerance of ±2% across temperature and load.

The LFC789D25 allows designers a great deal of flexibility in selecting external components and topology to implement their specific power-supply needs. With appropriate heat sinking, the designer can build a regulator with as much current capability as allowed by the external MOSFET and power supply. And, because the dropout of the regulator is simply the product of the RDS(on) of the external power MOSFET and the load current, very low dropout can be achieved via proper selection of the power MOSFET.

Packaged in 8-pin SOIC and space-saving TSSOP, the LFC789D25 is characterized for operation from 0°C to 70°C.
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类型 标题 下载最新的英语版本 日期
* 数据表 LFC789D25 数据表 (Rev. B) 2004年 9月 17日
应用手册 LDO 噪声揭秘 (Rev. B) PDF | HTML 英语版 (Rev.B) PDF | HTML 2020年 9月 16日
应用手册 LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 2017年 8月 9日
应用手册 简化的 LDO PSRR 测量 最新英语版本 (Rev.A) PDF | HTML 2010年 7月 28日

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SOIC (D) 8 查看选项
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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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