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LTC1625技术文档下载：
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LTC1625 - 典型应用图例：
LTC1625典型应用图例一
LTC1625典型应用图例二
LTC1625 - 封装图解：
LTC1625封装图解一
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LINEAR产品 - LTC1625介绍

LTC1625 - LTC1625是No RSENSETM Current Mode Synchronous Step-Down Switching Regulator

LTC1625是LINEAR凌力尔特公司的一款外部开关电源控制器产品，LTC1625是LTC1625是No RSENSETM Current Mode Synchronous Step-Down Switching Regulator，本站介绍了LTC1625的封装应用图解、特点和优点、功能等，并给出了与LTC1625相关的LINEAR元器件型号供参考。

LTC1625 - LTC1625是No RSENSETM Current Mode Synchronous Step-Down Switching Regulator - 外部开关电源控制器 - 电源管理 - 凌力尔特

LTC1625 - No RSENSETM Current Mode Synchronous Step-Down Switching Regulator

LTC1625 - No RSENSETM Current Mode Synchronous Step-Down Switching Regulator - Linear Technology（凌力尔特）

功能描述
The LTC1625 is a synchronous step-down switching regulator controller that drives external N-Channel power MOSFETs using few external components. Current mode control with MOSFET VDS sensing eliminates the need for a sense resistor and improves efficiency. The frequency of a nominal 150kHz internal oscillator can be synchronized to an external clock over a 1.5:1 frequency range. Burst Mode operation at low load currents reduces switching losses and low dropout operation extends operating time in battery-powered systems. A forced continuous mode control pin can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded. Fault protection is provided by foldback current limiting and an output overvoltage comparator. An external capacitor attached to the RUN/SS pin provides soft start capability for supply sequencing. A wide supply range allows operation from 3.7V (3.9V for LTC1625I) to 36V at the input and 1.19V to VIN at the output.

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特点
  • Highest Efficiency Current Mode Controller
  • No Sense Resistor Required
  • Stable High Current Operation
  • Dual N-Channel MOSFET Synchronous Drive
  • Wide VIN Range: 3.7V to 36V
  • Wide VOUT Range: 1.19V to VIN
  • ±1% 1.19V Reference
  • Programmable Fixed Frequency with Injection Lock
  • Very Low Drop Out Operation: 99% Duty Cycle
  • Forced Continuous Mode Control Pin
  • Optional Programmable Soft Start
  • Pin Selectable Output Voltage
  • Foldback Current Limit
  • Output Overvoltage Protection
  • Logic Controlled Micropower Shutdown: IQ < 30μA
  • Available in 16-Lead Narrow SSOP and SO Packages
    • 应用
  • Notebook and Palmtop Computers, PDAs
  • Cellular Telephones and Wireless Modems
  • Battery Chargers
  • Distributed Power
    • 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)
    LTC1625CGN SSOP-16 C $5.80 $4.90
    LTC1625CGN#PBF SSOP-16 C $5.80 $4.90
    LTC1625CGN#TR SSOP-16 C $4.96
    LTC1625CGN#TRPBF SSOP-16 C $4.96
    LTC1625CS SO-16 C $5.45 $4.55
    LTC1625CS#PBF SO-16 C $5.45 $4.55
    LTC1625CS#TR SO-16 C $4.61
    LTC1625CS#TRPBF SO-16 C $4.61
    LTC1625IGN SSOP-16 I $7.02 $5.90
    LTC1625IGN#PBF SSOP-16 I $7.02 $5.90
    LTC1625IGN#TR SSOP-16 I $5.96
    LTC1625IGN#TRPBF SSOP-16 I $5.96
    LTC1625IS SO-16 I $6.75 $5.50
    LTC1625IS#PBF SO-16 I $6.75 $5.50
    LTC1625IS#TR SO-16 I $5.56
    LTC1625IS#TRPBF SO-16 I $5.56
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