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推荐用于新设计
特性
- 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
- Programmable Voltage, Current Limit, Sequencing, Soft Start and Stop, Undervoltage and Overvoltage, Phase, Frequency (up to 4MHz), and Loop Compensation
- Integrated Three Times Programmable NVM
- Key Parameters Selectable by Resistor
- VOUT Set Point Range: 0.4V to 5.5V
- VOUT Accuracy: ±0.25%, 0.6V ≤ VOUT ≤ 1.375V
- PolyPhase Load Sharing up to Four Devices
- Differential Remote VOUT Sense
- Fast Transient Response
- Wide VIN Supply Range: Down to 2.9V or 1.5V with EXTVCC
- Programmable and Synchronizable: 400kHz to 4MHz
- 30-lead (3.5mm × 4mm) LQFN
产品详情和应用
The LT7171/LT7171-1 are monolithic PolyPhase DC/DC synchronous step-down regulators that deliver up to 20A of continuous output current. The LT7171-1 option has two switching phases that are connected to two inductors to drive a single-regulated output supply. The quick, clean, low-overshoot switching edges deliver high efficiency while minimizing electromagnetic interference (EMI) emissions. The I2C-based PMBus 1.3-compliant serial interface enables control of device functions while providing telemetry information for system monitoring. The LT7171/LT7171-1 are supported by the LTpowerPlay® graphical user interface (GUI) tool.
The controlled on-time valley current-mode control with 25ns typical minimum on-time enables a high switching frequency (fSW) at a low output voltage (VOUT) with excellent transient response in a small overall solution size.
VOUT, fSW, and phase are selectable using external configuration resistors. Settings can also be set via the PMBus interface or stored in the on-chip, three times programmable nonvolatile memory (NVM).
The LT7171/LT7171-1 use forced-continuous switching operation.
APPLICATIONS
- Communications, Storage, and Industrial Systems
- Data Center and Solid-State Drives
