LT80605

推荐用于新设计

3V to 65V, 5.5A Synchronous Step-Down Silent Switcher with 9μA Quiescent Current

数据手册 (Rev. SpA) 产品选型表
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。
Viewing:

概述

  • Silent Switcher® Architecture, Ultralow EMI Emissions
  • High Efficiency at High Frequency
    • Up to 94.5% at 400kHz, 24VIN to 5VOUT
    • Up to 93% at 1MHz, 24VIN to 5VOUT
  • Pin Selectable Adjustable, Fixed 3.3V and 5V Output
  • Ultralow Quiescent Current Burst Mode Operation
    • 9μA IQ Regulating 24VIN to 5VOUT
  • On-the-Fly Mode Change Among Burst, Pulse Skip and Forced Continuous Mode
  • Burst and Pulse Skipping Modes to Enable Enhanced Light-Load Efficiency
  • Built-in Output-Voltage Monitoring and Die Temperature Monitoring with PG/TJ
  • 99% Duty-Cycle Operation
  • 200kHz to 3MHz Adjustable Switching Frequency with External Clock Synchronization
  • 70V Transient-Input Tolerant
  • Internal Compensation
  • Programmable Soft-Start and Tracking
  • Built-in Hiccup Mode Overload Protection;
  • Safely Tolerates Inductor Saturation in Overload
  • Small 17-Lead 3mm × 4mm QFN

The LT80605 step-down regulator features the Silent Switcher® architecture to minimize EMI emissions while delivering high efficiency at frequencies up to 3MHz. Assembled in a 3mm x 4mm QFN, the monolithic construction with integrated power switches and inclusion of all necessary circuitry yields a solution with a minimal PCB footprint. An ultralow 9μA quiescent current with the output in full regulation enables applications requiring highest efficiency at light loads. The device features a SYNC/MODE pin that selects among Burst Mode, pulse skipping, or forced continuous mode (FCM), and also allows synchronization to an external clock. Soft-start and tracking functionality are accessed through the TR/SS pin. An accurate enable threshold can be set using the EN/UV pin and a resistor at the RT pin programs switch frequency. In addition, the device features a PG/TJ pin that can be used either to monitor the status of output voltage or die temperature. The die temperature monitor allows to directly measure the silicon die temperature, enabling a robust, reliable power supply design.

APPLICATIONS

  • General Purpose Step-Down
  • Automotive and Industrial Supplies
LT80605
3V to 65V, 5.5A Synchronous Step-Down Silent Switcher with 9μA Quiescent Current
LT80605 Typical Application LT80605 Typical Application Efficiency LT80605 Chip Illustration
添加至 myAnalog

将产品添加到myAnalog 的现有项目或新项目中（接收通知）。

创建新项目
提问

参考资料

数据手册 1

用户手册 1

申请保密协议

完成保密协议（NDA）后可获得完整的文件。

申请保密协议
了解更多
添加至 myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

创建新项目

软件资源

找不到您所需的软件或驱动?

申请驱动/软件

评估套件

eval board
schematic 1
schematic 2
schematic 3
EVAL-LT80605

Evaluates: LT80605 in 5V Output-Voltage Application

立即购买 更多内容

特性和优点

  • Silent Switcher® Architecture, Ultralow EMI Emissions
  • Input Voltage Range up to 65V
  • 400kHz Switching Frequency
  • High 93% Efficiency (VIN = 24V, IOUT = 5.5A)
  • 9μA IQ Regulating 24VIN to 5VOUT
  • On-the-Fly Mode Change Between Burst, Pulse Skip, and FCM
  • 99% Duty-Cycle Operation
  • 0.75μA Shutdown Current
  • Bias Bootstrap Input for Improved Efficiency
  • Burst and Pulse Skipping Modes to Enable Enhanced Light-Load Efficiency
  • Programmable Soft-Start and Tracking
  • Built-in Output-Voltage Monitoring and DieTemperature Monitoring with PG/TJ
  • Overtemperature and Overcurrent Protection
  • External Clock Synchronization.
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR 25 Conducted and Radiated Emissions

产品详情

The LT80605EVKIT# (EV kit) is a proven 5V design to evaluate the LT80605 synchronous step-down Silent Switcher®. The EV kit is designed for a 5V output. The wide input range up to 65V allows a variety of input sources, such as automotive batteries and industrial supplies. The LT80605 is a compact, ultralow EMI emission, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 9μA of quiescent current when the output is regulated at 5V. Top and bottom power switches, compensation components, and other necessary circuits inside the LT80605 minimize external components and simplify design.

The application circuit demonstrated in the evaluation board is suitable for a wide range of automotive, telecom, industrial, and other applications.

The LT80605 data sheet gives a complete description of the part, operation, and application information. Consult the data sheet in conjunction with this demo manual. Design files for this circuit board are available at www.analog.com.
EVAL-LT80605
Evaluates: LT80605 in 5V Output-Voltage Application
EVAL-LT80605 Board Photo Angle View EVAL-LT80605 Board Photo Top View EVAL-LT80605 Board Photo Bottom View

最新评论

需要发起讨论吗？ 没有关于 LT80605的相关讨论？是否需要发起讨论？

在EngineerZone®上发起讨论

近期浏览