替代器件

概览

优势和特点

  • High Power 3.3V to 1.XV-2.XV Switching Regulator
    Controller: Up to 20A Output
  • All N-Channel External MOSFETs
  • Provides 5V MOSFET Gate Drive with 3.3V Input
  • Constant Frequency Operation Minimizes
    Inductor Size
  • Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations
  • High Efficiency: Over 90% Possible
  • No Low-Value Sense Resistor Needed
  • Available in 16-Lead SO Package

产品详情

The LTC®1649 is a high power, high efficiency switching regulator controller optimized for use with very low supply voltages. It operates from 2.7V to 5V input, and provides a regulated output voltage from 1.26V to 2.5V at up to 20A load current. A typical 3.3V to 2.5V application features efficiency above 90% from 1A to 10A load. The LTC1649 uses a pair of standard 5V logic-level N-channel external MOSFETs, eliminating the need for expensive P-channel or super-low-threshold devices.

The LTC1649 shares its internal switching architecture with the LTC1430, and features the same ±1% line, load and temperature regulation characteristics. Current limit is user-adjustable without requiring an external low-value sense resistor. The LTC1649 uses a 200kHz switching frequency and voltage mode control, minimizing external component count and size. Shutdown mode drops the quiescent current to below 10µA.

The LTC1649 is available in the 16-pinnarrow SO package.


应用
  • 3.3V Input Power Supply for Low Voltage
    Microprocessors and Logic
  • Low Input Voltage Power Supplies
  • High Power, Low Voltage Regulators
  • Local Regulation for Multiple Voltage Distributed
    Power Systems

产品生命周期 icon-recommended 量产

该产品系列中至少有一个型号已量产并可供采购。该产品适合用于新设计,但也可能有更新的替代产品。

评估套件 (1)

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:

LTC1649

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LTC1649 配套产品

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