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LTC3541-2 - 典型应用图例：
LTC3541-2典型应用图例一
LTC3541-2典型应用图例二
LTC3541-2 - 封装图解：
LTC3541-2封装图解一
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LINEAR产品 - LTC3541-2介绍

LTC3541-2 - LTC3541-2是High Efficiency Buck + VLDO Regulator

LTC3541-2是LINEAR凌力尔特公司的一款内部开关电源降压产品，LTC3541-2是LTC3541-2是High Efficiency Buck + VLDO Regulator，本站介绍了LTC3541-2的封装应用图解、特点和优点、功能等，并给出了与LTC3541-2相关的LINEAR元器件型号供参考。

LTC3541-2 - LTC3541-2是High Efficiency Buck + VLDO Regulator - 内部开关电源降压 - 电源管理 - 凌力尔特

LTC3541-2 - High Efficiency Buck + VLDO Regulator

LTC3541-2 - High Efficiency Buck + VLDO Regulator - Linear Technology（凌力尔特）

功能描述
The LTC3541-2 combines a synchronous buck DC/ DC converter with a very low dropout linear regulator (VLDO regulator) and internal feedback resistor networks to provide two output voltages from a single input voltage with minimal external components. When configured for dual output operation, the LTC3541-2’s auto start-up feature will bring the 1.875V buck output into regulation in a controlled manner, prior to enabling the 1.5V VLDO output without the need for external pin control. The 1.5V VLDO/linear regulator output prior to 1.875V buck output sequencing may also be obtained via external pin control. The input voltage range is ideally suited for Li-Ion battery applications powering sub-3.3V logic from 5V or 3.3V rails.

The synchronous buck converter provides a high effi ciency output, typically 90%. It can provide up to 500mA of output current while switching at 2.25MHz, allowing the use of small surface mount inductors and capacitors. A mode select pin allows Burst Mode operation to be enabled for higher effi ciency at light load currents, or disabled for lower noise, constant frequency operation.

The VLDO regulator provides a low noise, low voltage output capable of providing up to 300mA of output current using only a 2.2μF ceramic capacitor. The input supply voltage of the VLDO regulator (LVIN) may come from the buck regulator output or a separate supply.

特点
  • High Efficiency, 500mA Buck Plus 300mA VLDO Regulator
  • Auto Start-Up Powers Buck Output Prior to VLDO/ Linear Regulator Output
  • Independent 500mA High Efficiency Buck (VIN: 2.7V to 5.5V)
  • 300mA VLDO Regulator with 30mA Standalone Mode
  • No External Schottky Diodes Required
  • Fixed Buck Output Voltage: 1.875V
  • VLDO Input Voltage Range (LVIN: 1.6V to 5.5V)
  • Fixed VLDO Output Voltage: 1.5V
  • Selectable Fixed Frequency, Pulse-Skip Operation or Burst Mode Operation
  • Short-Circuit Protected
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Shutdown Current: <3μA
  • Constant Frequency Operation: 2.25MHz
  • Low Dropout Buck Operation: 100% Duty Cycle
  • Small, Thermally Enhanced, 10-Lead (3mm × 3mm) DFN Package
    • 应用
  • Digital Cameras
  • Cellular Phones
  • PC Cards
  • Wireless and DSL Modems
  • Other Portable Power 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)
    LTC3541EDD-2#PBF 3x3 DFN-10 E $2.70 $1.89
    LTC3541EDD-2#TRPBF 3x3 DFN-10 E $1.95
    下面可能是您感兴趣的Linear Technology（凌力尔特）元器件
  • LTC3541-3 - High Efficiency Buck + VLDO Regulator
  • LTC3541 - High Efficiency Buck + VLDO Regulator
  • LT3641 - 具上电复位和看门狗定时器的双通道、单片式、降压型稳压器
  • LT3570 - 1.5A 降压型转换器、1.5A 升压型转换器和 LDO 控制器
  • LTC3520 - 同步 1A 降压-升压型和 600mA 降压型转换器
  • LT3582/LT3582-5/LT3582-12 - 具可选的 I2C 编程和 OTP 功能的升压和单电感器负输出 DC/DC 转换器
  • LT3694 / LT3694-1 - 具双通道 LDO 的 36V、2.6A 单片式降压型稳压器
  • LTC3522 - 同步 400mA 降压-升压型转换器和 200mA 降压型转换器
  • LT3463 - Dual Micropower DC/DC Converters with Schottky Diodes
  • LT1941 - 三通道、单片式开关稳压器
    • 下面可能是您感兴趣的凌力尔特公司内部开关电源降压元器件
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