LT7175-1

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24A, 4V, Single- or Dual-Phase, Silent Switcher Step-Down Regulators with Digital Power System Management

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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。

概述

  • Silent Switcher® Architecture: Enables a Compact, Efficient, Low EMI Solution
  • PMBus/I2C Serial Interface
    • Telemetry Read Back includes VOUT, IOUT, VIN, Die Temperature, and Faults 
    • READ_VOUT Accuracy: ±0.3% for < 0.6V, READ_IOUT Accuracy: ±5.5% for > 10A at VOUT/VIN < 25%, −25°C To 100°C, TJ
    • Programmable Voltage, Current Limit, Sequencing, Soft Start and Stop, Undervoltage and Overvoltage, Phase, Frequency (up to 3MHz), and Loop Compensation
    • Integrated Three Times Programmable NVM
  • Key Parameters Selectable by Resistor
  • VOUT Set Point Range: 0.3V to 3.4V
  • VOUT Accuracy: ±0.25%, 0.6V ≤ VOUT ≤ 1.375V
  • Optional Pulse-Skipping Mode
  • Differential Remote VOUT Sense
  • Fast Transient Response
  • Wide VIN Supply Range: Down to 2.7V or 1.5V with EXTVCC
  • Programmable and Synchronizable: 1MHz to 3MHz
  • 24-lead (3.5mm × 4mm) LQFN Package
LT7175-1
24A, 4V, Single- or Dual-Phase, Silent Switcher Step-Down Regulators with Digital Power System Management
LT7175_7175-1 Typical Application LT7175-1 Chip Ilustration
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EVAL-LT7175-1-AZ

24A, 4V Dual-Phase Silent Switcher Step-Down Regulator with Digital Power System Management

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产品详情

The evaluation kit EVAL-LT7175-1-AZ is a dual-phase, single-output monolithic DC/DC synchronous step-down regulator featuring the LT7175-1, with a 2.7V to 4V input range. With 3V to 12V EXTVCC provided, the input voltage can be as low as 1.5V. The output can supply a continuous load current of 24A. The Silent Switcher® regulator structure is incorporated into the LT7175-1 to minimize EMI and reduce PCB layout sensitivity. It also integrates digital power system management functionality, allowing programmability and telemetry through a PMBus/I2C compliant serial interface. Refer to the LT7175-1 data sheet for more detailed information.

The EVAL-LT7175-1-AZ evaluation board is designed for 0.5V output with a switching frequency set at 1.5MHz. The controlled on-time valley current-mode control with 25ns typical minimum on-time enables high switching frequency at low output voltage, along with excellent transient response in a small overall solution size.

The EVAL-LT7175-1-AZ powers up with default settings and produces power based on the NVM configuration without the need for any serial bus communication. This allows for easy evaluation of the DC/DC converter. To fully explore the power system management features of the part, download the LTpowerPlay® GUI software onto a PC and use ADI’s I2C/SMBus/PMBus dongle (DC1613A) to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly, store the configuration in NVM, and view telemetry of voltage, current, temperature, and fault status. The NVM can be programmed up to three times.

GUI Download

The software can be downloaded from LTpowerPlay.

The LT7175-1 data sheet provides a complete description of the part, operation, and application information. The data sheet must be read in conjunction with this demo manual for EVAL-LT7175-1-AZ.

For more details and instructions for LTpowerPlay, refer to the LTpowerPlay GUI and the LT7175-1 Quick Start Guide.
EVAL-LT7175-1-AZ
24A, 4V Dual-Phase Silent Switcher Step-Down Regulator with Digital Power System Management
EVAL-LT7175-1-AZ Top Angle Evaluation Board EVAL-LT7175-1-AZ Top Evaluation Board EVAL-LT7175-1-AZ Bottom Evaluation Board

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