LT7171

RECOMMENDED FOR NEW DESIGNS

20A, 16V, Single- or Dual Phase, Silent Switcher Step-Down Regulators with Digital Power System Management

Analog Devices LT7171 Product Info

10 February 2026 5

Features

Silent Switcher^® Architecture: Enables a Compact, Efficient, Low EMI Solution
PMBus/I²C Serial Interface
- Telemetry Read Back includes V_OUT, I_OUT, V_IN, 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

V_OUT Set Point Range: 0.4V to 5.5V
V_OUT Accuracy: ±0.25%, 0.6V ≤ V_OUT ≤ 1.375V
PolyPhase Load Sharing up to Four Devices
Differential Remote V_OUT Sense
Fast Transient Response
Wide V_IN Supply Range: Down to 2.9V or 1.5V with EXTV_CC
Programmable and Synchronizable: 400kHz to 4MHz
30-lead (3.5mm × 4mm) LQFN

Part details & applications

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 (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).

The LT7171/LT7171-1 use forced-continuous switching operation.

APPLICATIONS

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

Subscribe to Welllinkchips !

Your Name

* Email