Замена Конденсаторов

1:04

Planning capacitor replacement.

Accessing knowledge base.

Setting up project details.

Я подготовлю план, чтобы заменить тантал C3 на две керамики 1210 по 45 µF, параллельно на 5 V.

Удалим C3 между Net (+5V - P1) и GND.
Добавим две 45uF 1210 Ceramic Capacitor в параллель на Net (+5V - P1)–GND, близко к IC1/L1.
Присвоим обозначения (например, C3A/C3B) и обновим BOM.
Проверим ERC/DRC, включая дерейтинг: напряжение ≥1.5×VOUT и работа при ≤60% рейтинга.

Нажмите Start на планке, чтобы запустить изменения, или скажите, если хотите что-то поменять.

Plan

#Goal

Replace the existing tantalum output capacitor [C3] on the 5 V rail with two 45 µF 1210 ceramic capacitors connected in parallel, ensuring proper decoupling, voltage derating, and OEM placement near the TPS5430DDA buck regulator.

#Implementation plan

Remove the existing tantalum capacitor [C3] between Net (+5V - P1) and GND.
Select two 45 µF ceramic capacitors in 1210 package with low ESR and appropriate voltage rating (≥1.5×5V, ensuring operation at ≤60% of rating).
Place the two selected ceramic capacitors (designated as C3A and C3B) near the TPS5430DDA output (close to [IC1] and [L1]) and connect both in parallel from the +5V rail (Net (+5V - P1)) to GND.
Update the BOM to replace [C3] with the new capacitor designations and confirm decoupling best practices.
Run ERC/DRC reviews focusing on capacitor voltage rating, decoupling, and proper net assignments.

#Success criteria

The schematic has been updated to remove the existing [C3] and correctly include two 45 µF 1210 ceramic capacitors (C3A and C3B) in parallel on the 5 V rail.
The new capacitors obey voltage derating guidelines and are placed optimally near the buck regulator output for effective decoupling.
ERC/DRC passes with no errors related to capacitor voltage ratings and connections.

66 days

grabarsm

@library подбери 2× керамику 45µF в 1210, X7R, напряжение 16V или выше.

66 days

flux

4:37

Analyzing user request for components.

Clarifying capacitor selection process.

Finding appropriate capacitor parts.

Searching for specific capacitors.

Accessing knowledge base.

Searching for a component.

Searching library for: "ceramic MLCC capacitor, 45 uF capacitance, 1210 (3225 metric) package, X7R dielectric, voltage rating 16 V or higher, low ESR, used as bulk output capacitor for a 5 V buck regulator"

Creating search plan for: "ceramic MLCC capacitor, 45 uF capacitance, 1210 (3225 metric) package, X7R dielectric, voltage rating 16 V or higher, low ESR, used as bulk output capacitor for a 5 V buck regulator"

Searching.

Found 45 results.

Searching: "ceramic MLCC capacitor, 45 uF capacitance, 1210 (3225 metric) package, X7R dielectric, voltage rating 16 V or higher, low ESR, used as bulk output capacitor for a 5 V buck regulator"

Searching.

Found 60 results.

Searching: "ceramic MLCC capacitor, 45 uF capacitance, 1210 (3225 metric) package, X7R dielectric, voltage rating 16 V or higher, low ESR, used as bulk output capacitor for a 5 V buck regulator"

Searching.

Found 75 results.

Searching: "ceramic MLCC capacitor, 45 uF capacitance, 1210 (3225 metric) package, X7R dielectric, voltage rating 16 V or higher, low ESR, used as bulk output capacitor for a 5 V buck regulator"

Finished searching for a component.

Searching for a component.

Searching library for: "ceramic MLCC capacitor, 22 uF capacitance, 1210 (3225 metric) package, X7R dielectric, 16 V rating, low ESR, bulk output capacitor for a 5 V buck regulator"

Creating search plan for: "ceramic MLCC capacitor, 22 uF capacitance, 1210 (3225 metric) package, X7R dielectric, 16 V rating, low ESR, bulk output capacitor for a 5 V buck regulator"

Searching.

Found 46 results.

Searching: "ceramic MLCC capacitor, 22 uF capacitance, 1210 (3225 metric) package, X7R dielectric, 16 V rating, low ESR, bulk output capacitor for a 5 V buck regulator"

Finished searching for a component.

Planning capacitor search with queries.

Непосредственно 45 µF в 1210 X7R ≥16 V в библиотеке не нашлось. Ближайший эквивалент — 2× 22 µF 1210 X7R, что даст ~44 µF номинально. Оба варианта ниже соответствуют требованиям 1210/X7R и напряжению ≥16 V (соответствует правилу: рейтинг ≥1.5×VOUT и работа ≤60% от номинала).

Подходящие варианты (берите 2 одинаковых):

C3225X7R1C226K250AC — 22 µF, 16 V, X7R, 1210.
CS3225X7R226K250NRL — 22 µF, 25 V, X7R, 1210.

Предпочтете 16 V или 25 V (лучше держит емкость при DC bias)? Если ок с этим вариантом, скажите какой именно — добавлю обе в проект вместо тантала. Если 45 µF строго, могу предложить другие комбинации (другой рейтинг/габарит).

Выбрать 25V вариант

Выбрать 16V вариант

Нужны строго 45µF

Проверить текущий стабилизатор

66 days

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Assets

TPS5430_image.png

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Project Name

TPS5430 5V reference design

Description

This TPS5430DDA-based design is a step-down voltage regulator, converting a higher input voltage to a stable 5V output. Ideal for applications requiring a regulated 5V supply. #referenceDesign #project #stepDown #voltageRegulator #5V #TPS5430 #TPS5430DDA #powermanagement #texas-instruments #template #reference-design #polygon

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creativecommons.org/licenses/by/4.0/

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Distributor	Qty 1
Digi-Key	$7.73–$12.03
LCSC	$2.97–$3.66
Mouser	$10.91

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vasy_skral / TPS5430 5V reference design

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