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LTC3250 - 典型应用图例：
LTC3250典型应用图例一
LTC3250典型应用图例二
LTC3250 - 封装图解：
LTC3250封装图解一
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LINEAR产品 - LTC3250介绍

LTC3250 - LTC3250是High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter

LTC3250是LINEAR凌力尔特公司的一款稳压的降压型充电泵产品，LTC3250是LTC3250是High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter，本站介绍了LTC3250的封装应用图解、特点和优点、功能等，并给出了与LTC3250相关的LINEAR元器件型号供参考。

LTC3250 - LTC3250是High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter - 稳压的降压型充电泵 - 电源管理 - 凌力尔特

LTC3250 - High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter

LTC3250-1.5 - High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter - Linear Technology（凌力尔特）

功能描述

The LTC3250-1.5/LTC3250-1.2 are charge pump stepdown DC/DC converters that produce a 1.5V or 1.2V regulated output from a 2.7V to 5.5V input. The parts use switched capacitor fractional conversion to achieve typical efficiency two times higher than that of a linear regulator. No inductors are required.

A unique constant frequency architecture provides a low noise regulated output as well as lower input noise than conventional charge pump regulators.* High frequency operation (fOSC = 1.5MHz) simplifies filtering to further reduce conducted noise. The part also uses Burst Mode operation to improve efficiency at light loads.

Low operating current (35µA with no load, <1µA in shutdown) and low external parts count (three small ceramic capacitors) make the LTC3250-1.5/LTC3250-1.2 ideally suited for space constrained battery powered applications. The parts are short-circuit and overtemperature protected, and are available in a low profile (1mm) 6-pin ThinSOT™ package.

*U.S. Patent #6, 411, 531

特点
  • 2.7V to 5.5V Input Voltage Range
  • No Inductors
  • Li-Ion (3.6V) to 1.5V with 81% Efficiency
  • Low Noise Constant Frequency Operation
  • Output Voltages: 1.5V ±4%, 1.2V ±4%
  • Output Current: 250mA
  • Shutdown Disconnects Load from VIN
  • Low Operating Current: IQ = 35µA
  • Low Shutdown Current: ISD <1µA
  • Oscillator Frequency = 1.5MHz
  • Soft-Start Limits Inrush Current at Turn-On
  • Short-Circuit and Overtemperature Protected
  • Low Profile (1mm) ThinSOT™ Package
    • 应用
  • Handheld Computers
  • Cellular Phones
  • Digital Cameras
  • Handheld Medical Instruments
  • Low Power DSP Supplies
    • 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)
    LTC3250ES6-1.2 SOT-23 E $2.12
    LTC3250ES6-1.2#PBF SOT-23 E $2.12
    LTC3250ES6-1.2#TR SOT-23 E $2.12 $1.41
    LTC3250ES6-1.2#TRM SOT-23 E $2.12 $1.43
    LTC3250ES6-1.2#TRMPBF SOT-23 E $2.12 $1.43
    LTC3250ES6-1.2#TRPBF SOT-23 E $2.12 $1.41
    LTC3250ES6-1.5 SOT-23 E $2.12
    LTC3250ES6-1.5#PBF SOT-23 E $2.12
    LTC3250ES6-1.5#TR SOT-23 E $2.12 $1.41
    LTC3250ES6-1.5#TRM SOT-23 E $2.12 $1.43
    LTC3250ES6-1.5#TRMPBF SOT-23 E $2.12 $1.43
    LTC3250ES6-1.5#TRPBF SOT-23 E $2.12 $1.41
    下面可能是您感兴趣的Linear Technology（凌力尔特）元器件
  • LTC3251 - 500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converters
  • LTC6655 - 0.25ppm 噪声、低漂移、精准基准系列
  • LTC3260 - 低噪声、双通道电源的负输出充电泵
  • LT3080 - 可调 1.1A、单电阻、低压差稳压器
  • LTC1911-1.5 - Low Noise, High Efficiency, Inductorless Step-Down DC/DC Converter
  • LT1761 - 采用 SOT-23 封装的 100mA、低噪声、LDO 微功率稳压器
  • LTC3115-1 - 40V、2A、同步降压-升压型 DC/DC 转换器
  • LT3580 - 具 2A 开关、软起动和同步功能的升压/负输出 DC/DC 转换器
  • LT1763 - 500mA、低噪声、LDO 微功率稳压器
  • LTC3252 - Dual, Low Noise, Inductorless Step-Down DC/DC Converter
    • 下面可能是您感兴趣的凌力尔特公司稳压的降压型充电泵元器件
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