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Public evidence

electrical.buck.ripple

Machine-checked verification for calculation version 1.1.0 · tier expert_verified

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP: CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance· Ideal CCM assumed, not measured. No Iout, so CCM/DCM is not certified. ESR, DCM, and current-mode dynamics are out of scope. · Protocol · Schema · Production report

Declared partition coverage
PASS · 3/3 declared partitions (ccm-with-c, ccm-without-c, invalid-domain)
Versions
Calculation 1.1.0 · CVP protocol 1.0.0-proposed · Evidence 2026-09-11.ptp-ccm-c-optional
Verification revision
2026-09-11.ptp-ccm-c-optional · 4/4 property · digest 332ecf117919

Verification

Legacy regression suite: 15/15 calculation tests · Production surface contract 4/4

Three distinct suites: educational examples on the calculator page, this legacy regression count (15/15 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

    This calculator CURRENT · Public schema 1.1.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-09-11.ptp-ccm-c-optional. Calculation version 1.1.0. CVP 1.0.0-proposed. 2/2 golden · 12/12 CVP boundary · 15/15 invalid · 4/4 property · 4/4 metamorphic · 2/2 cross-interface · 4/4 CVP contract. digest 332ecf117919.

  • Golden (oracle-backed) 2 / 2
  • CVP boundary 12 / 12
  • Invalid input 15 / 15
  • Property 4 / 4
  • Metamorphic 4 / 4
  • Cross-interface 2 / 2
  • CVP contract 4 / 4
  • Interfaces PASS · UI (SSR) / REST / MCP
  • Interface claim ui-ssr is query-result HTML, not a live browser session.
  • Assurance Engineering
  • release artifacts aligned PASS
  • schema valid input executes PASS
  • engine success output validates schema PASS
  • schema rejects incomplete input PASS

Fingerprint sha256:1927974088aa4a98fa7d13d6207fd67d80a32a55485475972c6dcfb22939db70

Input schema sha256:c877e8a833a24fc7d74ecd9af3a2d84df1aa2d5c82b0076e7d2a965ba872ea5d · Output schema sha256:800d2d0f8dca7da1b6f17b885c435390030c1a705a4444e66484757b3c7498d6 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool
buck-ripple
Engine
buck-ripple
Engine build
2026-09-11
Evidence core
2026-09-11T14:08:29.678Z
Rendered
2026-09-16T22:03:43.746Z
Last reviewed
2026-09-11

Assumptions

  • Ideal CCM is assumed (not measured); valid when Iout > ΔI_L,pp/2
  • dI_L_A and dV_out_V are peak-to-peak
  • ΔV_C neglects ESR; capacitor-only ripple

Limitations

  • Ideal CCM is assumed, not measured — no Iout, so CCM/DCM is not certified
  • ΔI_L_A and ΔV_out_V are peak-to-peak, not RMS or amplitude
  • ΔV_out_V is capacitor-only (ESR=0); ESR and switching transients are neglected
  • DCM, current-mode control dynamics, and non-ideal switch/diode drops are out of scope

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Legacy published checks

Golden and boundary cases from the legacy Evidence JSON. CVP property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the Manifest — including SKIP when a suite has no vectors.

IDKindStatusDetail
ccmgoldenpassExpected dI_L_A=2.916666666666666 · Actual assumption=ccm · Vin_V=12 · Vout_V=5 · f_Hz=100000 · L_H=0.00001 · D=0.4166666666666667 · dI_L_A=2.916666666666666 · I_ccm_boundary_A=1.458333333333333
bad-ratioboundarypassExpected VALUE_OUT_OF_RANGE · Actual VALUE_OUT_OF_RANGE
missingboundarypassExpected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT
boundary-buckboundarypassExpected dI_L_A=2.916666666666666 · I_ccm_boundary_A=1.458333333333333 · Actual assumption=ccm · Vin_V=12 · Vout_V=5 · f_Hz=100000 · L_H=0.00001 · D=0.4166666666666667 · dI_L_A=2.916666666666666 · I_ccm_boundary_A=1.458333333333333
boundary-buck-no-cboundarypassExpected dI_L_A=2.916666666666666 · Actual assumption=ccm · Vin_V=12 · Vout_V=5 · f_Hz=100000 · L_H=0.00001 · D=0.4166666666666667 · dI_L_A=2.916666666666666 · I_ccm_boundary_A=1.458333333333333
boundary-buck-vout-eqboundarypassExpected VALUE_OUT_OF_RANGE · Actual VALUE_OUT_OF_RANGE
boundary-buck-vin-zeroboundarypassExpected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
boundary-buck-vout-zeroboundarypassExpected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
boundary-buck-f-zeroboundarypassExpected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
boundary-buck-l-zeroboundarypassExpected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
boundary-buck-c-zeroboundarypassExpected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
property-dIpropertypassdI
property-ccm-boundarypropertypassI_ccm_boundary
property-no-c-omits-dvpropertypassdV omitted
property-double-fpropertypassf→2f