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Evaluation of power management IP

 

Reach the best performance trade-off for your Power Management Network:

The Reusable Power kit Library (RPKL), based on the DELTA standard, is providing a complete power management network (PMNet) solution targeting either low power, high-efficiency, low BoM (Bill-of-Material), or low noise requirement.
To identify the optimal PMNet solution per application requirement and criteria, RPKL features the “Cooperative selection process” to evaluate the entire Power Management Network (PMNet) through a custom Figure-of-Merit (FoM) instead of benchmarking individual voltage regulators as usually performed. Thanks to this method, a key feature of the several benefits provide by the Delta offering, the SoC integrator then only needs to make a choice of performance trade-offs.

The Cooperative selection process:

1/ SoC Synoptics illustrating

  1. SoC architecture with list of functions
  2. List of Islands and type of loads, voltage ranges and maximum current consumption
  3. Interconnection (control and data interface) between functions and different Islands

2/ SoC Activity & Power State Table showing:

  1. Different SoC and Island modes, transition conditions
  2. Time spent by each Island in different modes (power duty cycle)
  3. Voltage level and current consumption of each Island in different modes

Prioritization of application criteria for Figure-of-Merit (FoM) definition: 1.Overall SoC Power 2. PMNet area 3. BoM

3/ PMNet Synoptics candidates:

Each PMNet solution can be the best for some extreme FoM but a tradeoff between power consumption (in active or/and standby mode), silicon area, BoM, low noise requirement is preferred

FoM computation of each PMNet solution e.g. FoM = 1 x average global power + 0.3 x regulator area + 0.05 x BoM
The lower the FoM here, the better the overall performance!

 

 

=> Each integrator makes a choice of performance between the different PMNet solutions thanks to FoM!

Synoptics

 

Synoptics

The Cooperative selection process also helps identify the Control Network to manage mode transitions at SoC level and the Hots spots to avoid damaging performances.

SoC Control Network specification

Once the PMNet is selected, the SoC integrator can supply Mode Transition Unit (MTU) and the Island Control Unit (ICU) shall be designed properly for controlling the power regulation and Island construction components. While the MTU (custom per SoC application) controls the SoC power modes and the SoC start-up sequence, ICU controls the start-up, the retention sequences of clock and the reset and power supply of an Island.

Thanks to our expertise in power management design and system-level simulation verification, the ICU (standardized per construction components) can be offered as part of our complete PMNet solution in order to:

  • Safely handle the SoC start-up sequence
  • Smoothly manage the different modes of Island by avoiding unexpected function behavior

Synoptics

Hot spots management

A review of the complete SoC synoptic enables to identify hot spots where SoC functionality and performances could be damaged due to mode transitions or noise propagation.

A consistent offering enabling early verifications of the robustness of the PMNet can be purchased with our virtual components:

  • Advanced views for fast but accurate verifications
  • PowerVisionTM EDA platform for top schematic assembly and verifications

Synoptics

SoC synoptics highlighting mode transition checks required
Synoptics

Screenshot of a schematic in PowerVision™

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