概览

优势和特点

  • Quad Step-down Outputs: 1.25A per Channel
  • Wide VIN Range: 2.7V to 17V
  • Wide VOUT Range: 0.6V to VIN
  • 1.25A/2.5A/3.75A/5A IOUT Configurable with One Inductor
  • Integrated 300mΩ P-Channel/80mΩ N-Channel MOSFETs Provide Up to 93% Efficiency
  • No-Load Burst Mode Operation IQ < 10µA with All Channels Enabled
  • Constant Frequency (1MHz/2.25MHz) with ±50% Frequency Synchronization Range
  • ±1% Output Voltage Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Full Dropout Operation (100% Duty Cycle)
  • Phase Shift Programmable with External Clock
  • 5mm × 5mm × 1.72mm BGA Package 

产品详情

The LTC3644/LTC3644-2 is a quad 1.25A output, high efficiency synchronous monolithic step-down regulator capable of operating from input supplies up to 17V. The switching frequency is internally fixed to 1MHz or 2.25MHz with a ±50% synchronization range. The regulator features ultralow quiescent current and high efficiency over a wide VIN and VOUT range.

The step-down regulator operates from an input voltage range of 2.7V to 17V and provides an adjustable output range from 0.6V to VIN while delivering up to 1.25A of output current per channel. LTC3644/LTC3644-2 can be configured for quad 1.25A outputs, triple 2.5A/1.25A/1.25A outputs, dual 2.5A outputs, or dual 3.75A/1.25A outputs. A user selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode® operation provides the highest efficiency at light loads, while forced-continuous mode provides the lowest ripple noise. The regulators can be synchronized to an external clock.

APPLICATIONS

  • Battery Powered Systems
  • Point-of-Load Supplies
  • Portable – Handheld Scanners and Cameras

产品生命周期 icon-recommended 推荐新设计使用

本产品已上市。数据手册包含所有最终性能规格和工作条件。ADI公司推荐新设计使用这些产品。

工具及仿真模型

LTspice

LTspice®是一款强大高效的免费仿真软件、原理图采集和波形观测器,为改善模拟电路的仿真提供增强功能和模型。

LTspice

LTspice中提供以下器件型号:

LTC3644
LTC3644-2

LTpowerCAD

LTpowerCAD®是一种电源设计程序,它选择功率级元件,提供详细效率信息,显示快速环路波特图稳定性和负载瞬态分析,并可导出至LTspice进行仿真。

LTPowerCAD

LTpowerCAD中提供以下器件的设计工具:

LTC3644
LTC3644-2
LTC3644-2PARALLEL
LTC3644PARALLEL

设计资源

ADI始终把满足您最高可靠性水平的产品放在首要位置。我们通过在所有产品、工艺设计和制造过程中引入高质量和可靠性检查实践这一承诺。发运的产品实现“零缺陷”始终是我们的目标。

样片申请及购买

电脑版网站提供样片和购买功能
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