LTC7151S
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LTC7151S

20V, 15A Synchronous Step-Down Silent Switcher 2 Regulator

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $4.42
Features
  • Silent Switcher®2 Architecture for Low EMI
  • VIN Range: 3.1V to 20V
  • VOUT Range: 0.5V to 5.5V
  • Differential VOUT Remote Sense
  • Adjustable Frequency: 400kHz to 3MHz
  • PolyPhase® Operation: Up to 12 Phases
  • Output Tracking and Soft-Start
  • AEC-Q100 Qualified for Automotive Applications
  • Reference Accuracy: ±1% Overtemperature
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Accurate 1.2V Run Pin Threshold
  • Supports Forced Continuous/Discontinuous Modes
  • 28-Lead Thermally Enhanced 4mm × 5mm × 0.74mm LQFN Package
Additional Details
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The LTC7151S is a high efficiency monolithic synchronous buck regulator capable of delivering 15A to the load. It uses a phase lockable controlled on-time constant frequency, current mode architecture. PolyPhase operation allows multiple LTC7151S regulators to run out-of-phase, which reduces the amount of input and output capacitors required. The operating supply voltage range is from 3.1V to 20V.

The operating frequency is programmable from 400kHz to 3MHz with an external resistor. The high frequency capability allows the use of physically smaller inductor and capacitor sizes. For switching noise sensitive applications, the LTC7151S can be externally synchronized from 400kHz to 3MHz. The PHMODE pin allows the user control of the phase of the outgoing clock signal. The unique constant frequency/controlled on-time architecture is ideal for high step-down ratio applications that operate at high frequencies while demanding fast transient response. The LTC7151S uses second generation Silent Switcher 2 technology including integrated bypass capacitors to deliver a highly efficient solution at high frequencies with excellent EMI performance.

Applications

  • Automotive and Industrial Power Supplies
  • Server Power Applications
  • Distributed Power Systems
  • Point-of-Load Supply for ASIC, FPGA, DSP, µP, etc.
Part Models 8
1ku List Price Starting From $4.42

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2615A

LTC7151S High Efficiency 15A Silent Switcher Buck Regulator

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DC2615A

LTC7151S High Efficiency 15A Silent Switcher Buck Regulator

LTC7151S High Efficiency 15A Silent Switcher Buck Regulator

Features and Benefits

  • Selectable light load operating modes of continuous conduction mode (CCM) or discontinuous mode (DCM).
  • SYNC pin to synchronize the regulator to an external clock.
  • PGOOD pin and RUN pin

Product Detail

Demonstration circuit 2615A features the LTC7151S in a high efficiency 1.2V/15A step-down regulator with an input voltage range of 3.1V to 20V and a 1MHz switching frequency. The Silent Switcher®2 technology reduces the switching noise while the internal MOSFETs of the LTC7151S provide high efficiency over a wide input voltage range. No current sense resistor is required.

The LTC7151S employs a controlled on-time, valley current mode architecture. This architecture allows for a short minimum on-time which is ideal for high stepdown ratios. In addition, the architecture provides a fast load step response by allowing the switch node pulses to compress after the load steps up – see Figure 6.

The LTC7151S data sheet provides a complete description of the IC operation and application information. The data sheet must be read in conjunction with the quick start guide.

Tools & Simulations

Tools & Simulations 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Reference Designs

Reference Designs 3

Blaize<sup>&reg;</sup> Pathfinder P1600 Embedded System on Module

Pathfinder P1600 SOM Module

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blaize-pathfinder

Pathfinder P1600 SOM Module

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Circuits from the lab

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Pathfinder P1600 SOM Module

Features and Benefits

Blaize® Pathfinder P1600 small form factor embedded SoM brings the programmability and efficiency benefits of the Blaize GSP® architecture, ideal for AI inferencing workloads at the edge, to embedded systems.

Analog Devices, Inc. supports end to end power delivery solutions for Blaize Pathfinder P1600 SOM. Blaize uses Analog Devices discrete power solutions to enable their System on Chip (SoC) to deliver high compute with optimized with most TOPS/Watt performance for datacenter and Artificial Intelligence.

ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files to enable you to validate the power solution for your application seamlessly.

For a complete list power designs and use cases, please contact your local FAE.

Key Power for full management devices are used as follows:

  • LTC7151S
  • LT8609S
  • LTC3636
  • ADP1752
  • ADP1755
View Detailed Reference Design external link
Full Power Management (-L Devices)​

Non-Hardware Verified Design

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Non-Hardware Verified Design

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Circuits from the lab

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Non-Hardware Verified Design

Features and Benefits

  • Xilinx Versal Premium series solves a broad range of industry-specific problems with performance and flexibility. Core use cases include storage acceleration, data center network acceleration, 5G xHaul and Passive optical networks.

  • Analog Devices, Inc. supports power delivery solutions for the Versal Premium Platform. Monolithic solutions are used on the Versal Premium Platform to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated discrete solutions optimized for cost, efficiency and footprint.

  • ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files to enable you to validate the power solution for your application seamlessly.

  • For a complete list power designs and use cases, please contact your local FAE.

  • Key Power for full management devices are used as follows:

    • LTC3884-1
    • LTC7051
    • ADP5056
    • LTC7132
    • ADP2389
    • ADP5052
    • ADP5054
    • LTC7150S
    • LTC7151S
View Detailed Reference Design external link
Versal HBM Diagram

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Circuits from the lab

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Features and Benefits

  • The Versal HBM series features heterogeneous integration of fast memory, secure connectivity, and adaptive compute to eliminate processing and memory bottlenecks for memory-bound, compute-intensive workloads such as machine learning, database acceleration, next-generation firewalls, and advanced network testers. Analog Devices has worked closely AMD to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
  • ADI provides supporting documentation including LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly. For a complete list  power designs and use cases, please contact your local local FAE.
  • ADI has also completed a complete power evaluation report for Mid-High Voltage rails. For a complete report please submit your interest here.

Key power regulators are used for this device as follows:

  • LTC3888-1
  • LTC7051
  • LTC3633A
  • LTC7200S
  • LTC7151S
  • LT8652
  • ADP125
  • LTC3617 (Optional)
  • LTC3618 (Optional)
View Detailed Reference Design external link

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