Source: https://guthlabs.ai/docs/instruments/switching-regulator-boost-component-calculator/implementation/

instrument implementation / implementation-contract

# Switching Regulator (Boost) Component Calculator implementation

A source-bound implementation contract for Switching Regulator (Boost) Component Calculator; deployment and executable qualification remain separate.

Status: **VERIFIED_WITH_ERRATA**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-with-binding-errata

**Evidence ID**: t5-017

**Effect**: Computation or source lookup only

## Input and validation requirements

The boundary and zero-denominator inputs require rejection, and the CCM/DCM branch is not defined even though the stated equations are explicitly idealized CCM equations. The capacitor-sizing formula and ripple convention are also omitted or ambiguous in the specification.

## Required corrections

````
[
  {
    "vector": "1,3",
    "field": "Cout_F",
    "wrong": "v1 4.1667e-6, v3 4.375e-6",
    "correct": "v1 8.333e-6, v3 3.646e-6 (Iout·D/(f·ΔV), which her own v4 uses exactly)",
    "cause": "output-capacitor convention flips between vectors: v1 halves it, v3 uses IL_avg instead of Iout, v4 standard"
  }
]
````

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "Vin_V": 12,
    "Vout_V": 24,
    "Iout_A": 2,
    "freq_Hz": 500000,
    "delta_IL_A": 1.2,
    "delta_Vout_V": 0.24
  },
  "expected_outputs": {
    "D": 0.5,
    "L_H": 0.00001,
    "Cout_F": 0.0000041666666667,
    "IL_avg_A": 4,
    "switch_peak_A": 4.6,
    "diode_peak_A": 4.6
  },
  "working": "D=1−12/24=1−0.5=0.5. L=12×0.5/(500000×1.2)=6/600000=0.00001 H. Cout=2×0.5/(500000×0.24)=1/120000=0.0000083333333333? Correction: denominator 500000×0.24=120000; numerator 1; therefore Cout=0.0000083333333333 F. IL_avg=2/(1−0.5)=2/0.5=4 A. Peak=4+1.2/2=4+0.6=4.6 A for both switch and diode."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/switching-regulator-boost-component-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/switching-regulator-boost-component-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/switching-regulator-boost-component-calculator/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche5/tranche5-results.json`

- `tranche errata record`