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LT1738 - 典型应用图例：
LT1738典型应用图例一
LT1738典型应用图例二
LT1738 - 封装图解：
LT1738封装图解一
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LINEAR产品 - LT1738介绍

LT1738 - LT1738是Slew Rate Controlled Ultralow Noise DC/DC Controller

LT1738是LINEAR凌力尔特公司的一款超低噪声稳压器产品，LT1738是LT1738是Slew Rate Controlled Ultralow Noise DC/DC Controller，本站介绍了LT1738的封装应用图解、特点和优点、功能等，并给出了与LT1738相关的LINEAR元器件型号供参考。

LT1738 - LT1738是Slew Rate Controlled Ultralow Noise DC/DC Controller - 超低噪声稳压器 - 电源管理 - 凌力尔特

LT1738 - Slew Rate Controlled Ultralow Noise DC/DC Controller

LT1738 - Slew Rate Controlled Ultralow Noise DC/DC Controller - Linear Technology（凌力尔特）

功能描述

The LT?1738 is a switching regulator controller designed to lower conducted and radiated electromagnetic interference (EMI). Ultralow noise and EMI are achieved by controlling the voltage and current slew rates of an exter-nal N-channel MOSFET switch. Current and voltage slew rates can be independently set to optimize harmonic content of the switching waveforms vs efficiency. The LT1738 can reduce high frequency harmonic power by as much as 40dB with only minor losses in efficiency.

The LT1738 utilizes a current mode architecture optimized for single switch topologies such as boost, flyback and Cuk. The IC includes gate drive and all necessary oscillator, control and protection circuitry. Unique error amp circuitry can regulate both positive and negative voltages. The internal oscillator may be synchronized to an external clock for more accurate placement of switching harmonics.

Protection features include gate drive lockout for low VIN, soft-start, output current limit, short-circuit current limit-ing, gate drive overvoltage clamp and input supply undervoltage lockout.

特点
  • Greatly Reduced Conducted and Radiated EMI
  • Low Switching Harmonic Content
  • Independent Control of Output Switch Voltage and Current Slew Rates
  • Greatly Reduced Need for External Filters
  • Single N-Channel MOSFET Driver
  • 20kHz to 250kHz Oscillator Frequency
  • Easily Synchronized to External Clock
  • Regulates Positive and Negative Voltages
  • Easier Layout Than with Conventional Switchers
    • 应用
  • Power Supplies for Noise Sensitive Communication Equipment
  • EMI Compliant Offline Power Supplies
  • Precision Instrumentation Systems
  • Isolated Supplies for Industrial Automation
  • Medical Instruments
  • Data Acquisition Systems
    • 以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
    器件型号 封装 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量)
    LT1738EG SSOP-20 E $4.85 $4.10
    LT1738EG#PBF SSOP-20 E $4.85 $4.10
    LT1738EG#TR SSOP-20 E $4.20
    LT1738EG#TRPBF SSOP-20 E $4.20
    LT1738IG SSOP-20 I $5.50 $4.65
    LT1738IG#PBF SSOP-20 I $5.50 $4.65
    LT1738IG#TR SSOP-20 I $4.75
    LT1738IG#TRPBF SSOP-20 I $4.75
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  • LT1683 - 转换速率控制型超低噪声推挽式 DC/DC 控制器
  • LT1533 - Ultralow Noise1A Switching Regulator
  • LT1534 - Ultralow Noise 2A Switching Regulator
  • LT3439 - 摆率受控的超低噪声 1A 隔离式 DC/DC 变压器驱动器
  • LT3080 - 可调 1.1A、单电阻、低压差稳压器
  • LT1763 - 500mA、低噪声、LDO 微功率稳压器
  • LT8614 - 具 2.5μA 静态电流的 42V、4A 同步降压型 Silent Switcher
  • LT3757 - 升压、反激式、SEPIC 和负输出控制器
  • LT8471 - 具 2A 开关和同步功能的双通道、多拓扑 DC/DC 转换器
  • LT3758 - 高输入电压、升压、反激式、SEPIC 和负输出控制器
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