LT7176: 24A, 4V, Single- or Dual-Phase, Silent Switcher Step-Down Regulators with Digital Power System Management

The quick, clean, low-overshoot switching edges of the LT7176 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 LT7176/LT7176-1 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 (f_SW) at a low output voltage (V_OUT) with excellent transient response in a small overall solution size.
 
V_OUT, f_SW, 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).

• 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 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
• PolyPhase Load Sharing up to Four Devices
• Optional Pulse-Skipping Mode Enables Low Quiescent Current
• 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
• 30-lead (3.5mm × 4mm) LQFN

• Communications, Storage, and Industrial Systems
• Data Center and Solid-State Drives