LT80603

预发布

3V to 65V, 2.5A/3.5A/4.5A Synchronous Step-Down Silent Switcher with 8μA Quiescent Current

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产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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概述

  • Silent Switcher® Architecture
    • Ultralow EMI Emissions
    • Spread Spectrum Frequency Modulation
  • High Efficiency at High Frequency
    • Up to 94.3% at 400kHz, 90% at 2.1MHz, 24VIN to 5VOUT
    • Up to 95.6% at 400kHz, 91.1% at 2.1MHz, 48VIN to 12VOUT
  • Pin Selectable Fixed 3.3V, Fixed 5V, or Adjustable Output from 0.8V to 99% of VIN
  • Low Quiescent Current Burst Mode Operation
    • 8μA IQ Regulating 24VIN to 5VOUT
  • On-the-Fly Mode Change Among Burst Mode, Pulse-Skipping Mode, and FCM
  • Built-in Output-Voltage Monitoring and Die Temperature Monitoring with PG/TJ
  • 200kHz to 3MHz Adjustable Switching Frequency with External Clock Synchronization
  • 80V Transient-Input Tolerant (LT8060xHV)
  • Programmable Soft-Start and Tracking
  • Small 17-Lead 3mm × 3mm Quad Flat No-lead (QFN)

The LT8060x and LT8060xHV step-down regulators family feature the Silent Switcher® architecture to minimize electromagnetic interference (EMI) emissions while delivering high efficiency at frequencies up to 3MHz. The LT80602 and LT80602HV deliver up to 2.5A continuous current, the LT80603 and LT80603HV support up to 3.5A, and the LT80603A and LT80603AHV provide up to 4.5A continuous current. An ultralow 8μA quiescent current, with the output in full regulation, enables applications requiring the highest efficiency at light loads. An accurate enable threshold can be set using the EN/UV pin and a resistor at the RT pin to program the switch frequency.

The LT8060x and LT8060xHV enable high-VIN to low-VOUT conversion at high frequency, featuring a productiontested fast minimum top-switch on-time of 25ns (typ). In addition, the device features a PG/TJ pin that can be used to monitor the status of the output voltage or the die temperature. The die temperature monitor allows for direct measurement of the silicon die temperature, enabling a robust and reliable power supply design.

APPLICATIONS

  • General Purpose Step-Down
  • Automotive and Industrial Supplies
LT80603
3V to 65V, 2.5A/3.5A/4.5A Synchronous Step-Down Silent Switcher with 8μA Quiescent Current
LT80602-LT80603 Simplified Application Diagram LT80602-LT80603 Efficiency LT80602-LT80603 Pin Configuration LT80603 Chip Illustration
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