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LTC1705 - 典型应用图例:
LTC1705典型应用图例一
LTC1705 - 封装图解:
LTC1705封装图解一
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Linear产品 - LTC1705介绍
LTC1705 - LTC1705是Dual 550kHz Synchronous Switching Regulator Controller with 5-Bit VID and 150mA LDO

LTC1705是Linear公司的一款数字可编程的降压型稳压器产品,LTC1705是Dual 550kHz Synchronous Switching Regulator Controller with 5-Bit VID and 150mA LDO,本站介绍了LTC1705的封装应用图解、特点和优点、功能等,并给出了与LTC1705相关的凌力尔特元器件型号供参考。

LTC1705 - Dual 550kHz Synchronous Switching Regulator Controller with 5-Bit VID and 150mA LDO

LTC1705 - Dual 550kHz Synchronous Switching Regulator Controller with 5-Bit VID and 150mA LDO - Linear Technology(凌力尔特)

功能描述
The LTC1705 is a complete power supply controller for Intel Mobile Pentium processors. It includes two switching regulator controllers, each designed to drive a pair of N-channel MOSFETs in a voltage mode feedback, synchronous buck configuration, to provide the core and I/O supplies. The core controller includes a 5-bit DAC that conforms to the Intel Mobile VID specification. The IC also includes a low dropout linear regulator (LDO) that delivers up to 150mA of output current to provide the CLK supply. The LTC1705 uses a constant-frequency 550kHz PWM architecture, minimizing external component size and cost, as well as optimizing load transient performance. It provides better than 1.25% DC accuracy at its core output, and 2% at I/0 and CLK outputs. The high performance feedback loops allow the circuit to keep total output regulation within ±5% under all transient conditions. An open-drain PGOOD flag indicates that all three outputs are within ±10% of their regulated values. A shutdown circuit disables all three outputs if the RUN/SS pin is pulled to ground. In this mode, the LTC1705 supply current drops to below 100µA.
特点
  • Three Regulated Outputs: Core, I/O and CLK in One Package
  • Integrated Intel Mobile 5-Bit VID DAC
  • No External Current Sense Resistors
  • All N-Channel External MOSFET Architecture
  • 550kHz Switching Frequency Minimizes External Component Size and Cost
  • Integrated 150mA LDO Linear Regulator
  • Excellent DC Accuracy: 1.25% for Core, 2% for I/O and CLK Supplies
  • PGOOD Flag Monitors All Three Outputs
  • High Efficiency Over Wide Load Current Range
  • Low Shutdown Current: < 100µA
  • Switchers Run Out-of-Phase to Minimize CIN
  • Small 28-Pin Narrow SSOP Package
  • 应用
  • Complete Power Supply Controller for Intel Mobile Pentium® Processors
  • Intel Mobile Pentium Core, I/O, Clock Supplies
  • Multiple Logic Supply Generator
  • 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)
    LTC1705EGN SSOP-28 E $6.00 $5.35
    LTC1705EGN#PBF SSOP-28 E $6.00 $5.35
    LTC1705EGN#TR SSOP-28 E $5.36
    LTC1705EGN#TRPBF SSOP-28 E $5.36
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