概览

优势和特点

  • High Efficiency Synchronous Operation
    • > 90% Efficiency at 30mA, 12VIN to 3.3VOUT
  • Ultralow Quiescent Current Burst Mode® Operation
    • < 2.5µA IQ Regulating 48VIN to 3.3VOUT
    • Output Ripple < 10mVP-P
  • 3.4V to 60V Input Operation Range (65V Max)
  • Fast Minimum Switch-On Time: 35ns
  • Adjustable Switching Frequency: 200kHz to 2.2MHz
  • Fixed 3.3V Output Voltage Version
  • Allows Tiny Inductors
  • Accurate 1V Enable Pin Threshold
  • Internal Compensation
  • Output Soft-Start and Tracking
  • Small 10-Lead 3mm × 2mm DFN
  • AEC-Q100 Qualification in Progress

产品详情

The LT8618 is a compact, high speed synchronous monolithic step-down switching regulator that delivers up to 100mA with high efficiency at constant switching frequency, even up to 2.2MHz. It accepts a wide input voltage range up to 65V (transients only, 60V for continuous operation), and consumes only 2.5µA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. Additional features provide for flexible and robust operation. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN under voltage lockout or to shut down the LT8618 reducing the input supply current to 1µA. If there are no fault conditions, a PG flag signals when VOUT is within ±7.5% of the programmed output voltage. Thermal shutdown provides additional protection. The LT8618 is available in a small 10-Lead 3mm × 2mm DFN package with exposed pad for low thermal resistance.

Applications

  • Industrial Sensors
  • Industrial Internet of Things
  • 4mA to 20mA Current Loops
  • Flow Meters
  • Automotive Housekeeping Supplies

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

Models for the following parts are available in LTspice:

LT8618
LT8618-3.3

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

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