LTC1503-1.8 - High Efficiency Inductorless Step-Down DC/DC Converter

特点

  • Input Voltage Range: 2.4V to 6V
  • Fixed Output Voltages: 1.8V ±4%, 2V ±4%
  • Output Current: 100mA
  • No Inductors
  • Typical Efficiency 25% Higher than LDOs
  • Low Operating Current: 25µA
  • Low Shutdown Current: 5µA
  • 600kHz Switching Frequency
  • Shutdown Disconnects Load from VIN
  • Soft-Start Limits Inrush Current at Turn-On
  • Short-Circuit and Overtemperature Protected
  • Available in 8-Pin MSOP and SO Packages

典型应用

LTC1503 Typical Application
LTC1503 Typical Application

描述

The LTC®1503-1.8/LTC1503-2 are switched capacitor step-down DC/DC converters that produce a regulated output from a 2.4V to 6V input. The parts use switched capacitor fractional conversion to achieve high efficiency over the entire input range. No inductors are required. Internal circuitry controls the step-down conversion ratio to optimize efficiency as the input voltage and load conditions vary. Typical efficiency is 25% higher than that of a low dropout (LDO) linear regulator. Regulation is achieved by sensing the output voltage and enabling the internal switching network as needed to maintain a fixed output voltage. This method of regulation enables the parts to achieve high efficiency at extremely light loads. Low operating current (25µA with no load, 5µA in shutdown) and low external parts count (two 1µF flying capacitors and two 10µF bypass capacitors) make the LTC1503-1.8/LTC1503-2 ideally suited for space constrained battery-powered applications. The parts are fully short-circuit and overtemperature protected. The LTC1503-1.8/LTC1503-2 are available in 8-pin MSOP and SO packages.

封装

CAD 符号和封装布局: 下面可下载的 Zip 文件包含原理图符号和 PCB 封装布局 (可与 Mentor Graphics PADS® v9.5 或更高版本、和 Cadence ORCAD® v16.5 或更高版本兼容)。

如需了解完整与最新的封装信息及图例,请查阅我们的封装网页

器件型号 封装 Code 温度 封装图 RoHS 数据
LTC1503CMS8-1.8#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1503CMS8-1.8#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC1503CMS8-2#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1503CS8-1.8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1503CS8-1.8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1503CS8-2#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1503CS8-2#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1503IS8-1.8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1503IS8-1.8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1503IS8-2#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1503IS8-2#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes


LTC1503 Package Drawing
LTC1503 Package Drawing

订购信息

  • 以 PBF 结尾的器件型号表示这些是无铅型器件。如需了解有关含铅涂层器件的信息,请与凌力尔特公司联系。

  • 型号当中包含 TR 或 TRM 的器件分别采用卷带装500 片微型卷带装的形式进行装运。

  • 如需了解更多的细节,请查阅我们一般订购信息或产品数据手册。

各种封装型式和定价

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) * RoHS 数据
LTC1503CMS8-1.8#PBF MS-8 C $2.20 $1.90 Yes
LTC1503CMS8-1.8#TRPBF MS-8 C $1.96 Yes
LTC1503CMS8-2#PBF MS-8 C $2.20 $1.90 Yes
LTC1503CS8-1.8#PBF SO-8 C $2.00 $1.70 Yes
LTC1503CS8-1.8#TRPBF SO-8 C $1.76 Yes
LTC1503CS8-2#PBF SO-8 C $2.00 $1.70 Yes
LTC1503CS8-2#TRPBF SO-8 C $1.76 Yes
LTC1503IS8-1.8#PBF SO-8 I $2.45 $2.05 Yes
LTC1503IS8-1.8#TRPBF SO-8 I $2.11 Yes
LTC1503IS8-2#PBF SO-8 I $2.45 $2.05 Yes
LTC1503IS8-2#TRPBF SO-8 I $2.11 Yes
购买要求提供样品

* 美国价目表所列之价格仅供预算之用,单位为美元 (针对规定批量的美国 FOB 单价),随时可能变更。国际销售价格有可能因为地方税额、费用和汇率而有所不同。如需了解特定批量的价格或货运报价,请您与凌力尔特当地的销售办事处或授权分销商联系

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器件型号 描述 价格 Documentation
DC250A-A LTC1503CMS8-2 | High Efficiency Inductorless Step-Down DC/DC Converter, 2.4 to 6Vin, 2Vout @ 100mA $100.00
DC250A-B LTC1503CMS8-1.8 | High Efficiency Inductorless Step-Down DC/DC Converter, 2.4 to 6Vin, 1.8Vout @ 100mA $100.00
购买
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应用

  • Cellular Phones
  • Handheld Computers
  • Smart Card Readers
  • Low Power DSP Supplies
  • Portable Electronic Equipment
  • Handheld Medical Instruments

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用于下列器件的模型可在 LTspice IV 中提供:
LTC1503-1.8
LTC1503-2

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