Texas Instruments

TPS5430DDAR - Conversor Step-Down 3A, 36V | Texas Instruments

N.º da peça: TPS5430DDAR ✓ Ativo
Em estoque Enviado em 1 a 3 dias úteis
5.5 V to 36 V Vdss 3 A Id 8-PowerSOIC (DDA), PowerPAD, 0.154 in / 3.90 mm width Package 500 kHz (fixed) Speed
A partir de $1.19 USD / unidade
MOQ: 1 |
Preço atualizado: 2026-08-29
Preços por volume
Qtd. Preço unitário Total
1 $2.15 $2,15
10 $1.93 $19,30
100 $1.62 $162,00
500 $1.38 $690,00
1.000 $1.19 $1.190,00
ℹ️ Todos os preços estão em USD

TPS5430DDAR Visão geral

O Texas Instruments TPS5430DDAR é um conversor DC-DC step-down (buck) de 3A com entrada ampla, em encapsulamento SO PowerPAD (DDA) de 8 pinos. Aceita entrada de 5,5V a 36V e fornece saída ajustável de 1,221V até próximo de VIN com frequência de comutação fixa de 500kHz.

Um conversor buck é um tipo de regulador de tensão chaveado que reduz eficientemente uma tensão DC mais alta para uma mais baixa usando um MOSFET de comutação, um indutor e capacitores de saída. Diferentemente dos reguladores lineares, os conversores chaveados rotineiramente ultrapassam 90% de eficiência, tornando-os a base das hierarquias modernas de ICs de gerenciamento de energia (conversor DC-DC -> regulador chaveado -> conversor point-of-load). O TPS5430 pertence à família SWIFT de conversores DC-DC da TI.

As principais características incluem a faixa de entrada de 5,5V a 36V que aceita diretamente barramentos industriais e automotivos de 12V e 24V, corrente de saída contínua de 3A, operação fixa em 500kHz que permite indutores pequenos, MOSFET N-channel de lado alto integrado, compensação de malha interna, soft-start, limitação de corrente ciclo a ciclo e desligamento térmico. O encapsulamento SO-8 PowerPAD com aprimoramento térmico proporciona baixa resistência térmica para operação em plena carga sem dissipador externo.

O dispositivo usa controle PWM em modo tensão com referência bandgap interna de 1,221V; a tensão de saída é definida por um divisor resistivo externo no pino VSENSE. Um capacitor de bootstrap entre BOOT e PH eleva o gate do MOSFET de lado alto acima de VIN. A operação em frequência fixa simplifica o projeto do filtro EMI em comparação com conversores de frequência variável.

Aplicações típicas incluem fontes point-of-load para FPGAs, DSPs e microcontroladores, alimentação de barramento industrial de 24V, trilhos intermediários de telecom, alimentação de acessórios automotivos de 12V e sistemas de alimentação distribuída de 5V/3,3V.

Dica de projeto: posicione os capacitores de entrada/saída e o capacitor de bootstrap próximos ao CI, solde o PowerPAD a um plano de cobre com vias térmicas e mantenha o nó de comutação PH e as malhas de potência curtas para minimizar ringing e EMI.

Alternativas drop-in para TPS5430DDAR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.

Variantes desta série

Modelos da mesma série compatíveis como drop-in com TPS5430DDAR (mesmo formato e footprint) — diferindo em Topology, Output Voltage Range, Package, Input Voltage Range, Control Method.

onsemi
Topology: Synchronous Buck (Step-Down)
Output Voltage Range: 0.6 V to 5.5 V (Adjustable)
Input Voltage Range: 4 V to 16 V
Comparar com TPS5430DDAR →
Texas Instruments
Topology: Buck (Step-Down), Non-Synchronous
Output Voltage Range: 2.5 V to 75 V (adjustable)
Package: VSSOP-8 (DGK), 3.0 mm body width
MaxLinear
Topology: Synchronous Buck (step-down)
Output Voltage Range: 0.8 V minimum (adjustable)
Input Voltage Range: 2.5 V to 28 V
Comparar com TPS5430DDAR →
Texas Instruments
Output Voltage Range: 1.221 V to 31 V (adjustable)
Package: 8-PowerSOIC / HSOIC (DDA), 3.90 mm width
Control Method: Voltage Mode PWM
Comparar com TPS5430DDAR →
Texas Instruments
Topology: Buck (Step-Down)
Output Voltage Range: 1.221 V to 31 V (adjustable)
Package: HSOIC PowerPAD (DDA), 8 pins, 3.90 mm width
Comparar com TPS5430DDAR →

Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:

TPS5430DDA

✅ Drop-In
📦 8-PowerSOIC (DDA)
same die and package, tube packaging instead of tape and reel

📋 Alternativa de referência (fora do catálogo)

TPS5430DDAG4

✅ Drop-In
📦 8-PowerSOIC (DDA)
identical die, G4 RoHS designation variant

📋 Alternativa de referência (fora do catálogo)

TPS5430QDDARQ1

✅ Drop-In
Texas Instruments
📦 8-PowerSOIC (DDA)
Step-Down (Buck) · 5.5 V to 36 V · 1.221 V to 31 V (adjustable) · 3 A · 500 kHz (fixed) · Voltage Mode PWM · No · 1

✓ Em estoque

$1.95 / unidade

Ver ficha técnica →

TPS5450DDAR

✅ Drop-In
Texas Instruments
📦 8-PowerSOIC (DDA)
Buck (Step-Down) · 5.5 V to 36 V · 1.221 V to 31 V (adjustable) · 5 A · 500 kHz (fixed) · 1 · Voltage-mode PWM, internally compensated · Low-resistance high-side N-channel

✓ Em estoque

$2.55 / unidade

Ver ficha técnica →

TPS54331DR

⚡ Mesmo encapsulamento
Texas Instruments
📦 SOIC-8
Non-synchronous Buck (Step-Down) · 3.5 V to 28 V · 0.8 V to 25 V (adjustable) · 3 A · 570 kHz (fixed) · Current mode with internal slope compensation · Eco-mode pulse skipping · 1 uA

✓ Em estoque

$0.85 / unidade

Ver ficha técnica →

MP1584EN

⚡ Mesmo encapsulamento
📦 SOIC-8 EP
cross-brand functional alternative, not pin-compatible, 1.5A output, requires PCB redesign

📋 Alternativa de referência (fora do catálogo)

RT8279GSP

⚡ Mesmo encapsulamento
📦 SOP-8
cross-brand cost-effective alternative, pinout verification required

📋 Alternativa de referência (fora do catálogo)

TPS5430DDAR Classificações máximas e características elétricas

Topologia Step-Down (Buck)
Faixa de tensão de entrada 5.5 V to 36 V
Tensão de saída Adjustable, 1.221 V to near VIN
Corrente máxima de saída 3 A
Frequência de comutação 500 kHz (fixed)
Tensão de referência 1.221 V
Control Topology Voltage-mode PWM
MOSFET Integrated high-side N-channel
Protection Features Cycle-by-cycle current limit, thermal shutdown, soft-start
Número de saídas 1
Encapsulamento 8-PowerSOIC (DDA), PowerPAD, 0.154 in / 3.90 mm width
Tipo de montagem Surface Mount
Packaging Tape & Reel (R suffix)
Status RoHS Compliant
Family TI SWIFT DC-DC converters

Configuração de pinos do TPS5430DDAR

SOIC-8 Package Pinout Diagram SOIC-8 8-pin small outline IC, 3.9x4.9mm, P1.27mm, JEDEC MS-012. 1 8 2 7 3 6 4 5 SOIC-8
Pino 1 BOOT — Bootstrap capacitor connection to PH for high-side gate drive
Pino 2 NC/GND — No connect / ground per datasheet layout
Pino 3 VSENSE — Feedback input from output voltage divider (1.221V reference)
Pino 4 ENA — Enable input, active high
Pino 5 SS/TR — Soft-start / tracking programming pin
Pino 6 GND — Ground reference (PowerPAD also ground)
Pino 7 VIN — Input supply, 5.5V to 36V
Pino 8 PH — Phase / switch node to inductor

Aplicações típicas

TPS5430DDAR é adequado para 6 aplicaçãos: 24V Industrial Bus Point-of-Load, 12V Automotive Accessory Power, FPGA/DSP Point-of-Load Supply, Telecom Intermediate Rail Conversion, Distributed 5V/3.3V Power Systems, Battery-Powered and Portable Instrumentation.

🏭

24V Industrial Bus Point-of-Load

The TPS5430DDAR's 5.5V to 36V input range directly accepts 24V industrial control buses with transient headroom, eliminating a pre-regulator stage. Delivering 3A at a fixed 500kHz, it powers PLC I/O modules, sensors, and motor-drive logic rails. Internal compensation and fixed-frequency PWM simplify EMI filter design, while cycle-by-cycle current limit protects against shorted loads on long factory wiring. Its 1.221V reference allows any intermediate rail from 1.22V upward.

🚗

12V Automotive Accessory Power

For 12V automotive accessory rails, the 36V maximum input covers load-dump-adjacent conditions in protected front ends, and the automotive-qualified TPS5430QDDARQ1 variant (same footprint) supports AEC-Q100 programs. The 3A output supplies infotainment sub-rails, telematics, and body-electronics processors at 5V or 3.3V with efficiency above 90%, reducing thermal load in sealed enclosures. Fixed 500kHz switching keeps inductors small for space-constrained modules.

🔧

FPGA/DSP Point-of-Load Supply

The TPS5430DDAR provides 3A core and I/O rails for FPGAs, DSPs, and microcontrollers from 5V or 12V intermediates. Its soft-start pin enables controlled inrush for high ceramic capacitance, and the 500kHz fixed frequency allows inductors in the 10-15uH class with fast transient response for logic load steps. The 1.221V reference supports modern low-voltage cores, and the PowerPAD package dissipates conversion losses without a heatsink at typical 2-3A loads.

🌐

Telecom Intermediate Rail Conversion

In telecom and networking equipment, the TPS5430DDAR converts intermediate distribution voltages down to point-of-load rails with 90%+ efficiency. The 36V input tolerates -48V-derived rails after a step-down front end, and the wide input range allows one BOM across 12V, 15V, and 24V shelves. The thermal shutdown and hiccup-style current limit protect against fan-failure thermal events common in telecom cabinets, while the SO-8 PowerPAD suits high-density line-card layouts.

⚡

Distributed 5V/3.3V Power Systems

For distributed power architectures, the TPS5430DDAR generates 5V or 3.3V logic rails from upstream intermediates at a fixed 500kHz, so ripple falls in a predictable band that standard LC filters attenuate easily. Voltage-mode PWM with internal compensation reduces external component count to an inductor, two divider resistors, and input/output capacitors, cutting BOM cost. The adjustable output and 3A capacity cover backplane-fed subsystems, industrial gateways, and test-instrument auxiliaries.

📱

Battery-Powered and Portable Instrumentation

Portable instruments powered by 12V lead-acid or multi-cell Li-ion packs benefit from the TPS5430DDAR's wide 5.5V-36V input that spans battery discharge curves. Fixed-frequency 500kHz operation keeps the converter out of audible bands and enables magnetics small enough for handheld enclosures, while better than 90% efficiency extends runtime. Thermal shutdown protects against blocked ventilation, and the SS pin can sequence the analog front end after the digital core.

What is the input voltage range of TPS5430DDAR?
The TPS5430DDAR operates from 5.5V to 36V input, per TI datasheet (TPS543x, SLVS632). This wide range allows direct connection to 12V and 24V industrial and automotive buses without a pre-regulator, making it a versatile point-of-load buck converter.
How much output current can the TPS5430DDAR deliver?
The TPS5430DDAR delivers up to 3A of continuous output current. The integrated high-side N-channel MOSFET and PowerPAD package thermal design support full 3A loads without an external heatsink when proper PCB copper is used, per the TI datasheet thermal application section.
What is the price of TPS5430DDAR?
As of 2026-08-29, TPS5430DDAR pricing starts at approximately $2.15 for single units and drops to around $1.19 at 1000-piece quantities from major distributors such as DigiKey and Mouser. Pricing varies by distributor and stock conditions; check current listings before ordering.
Where to buy TPS5430DDAR online?
TPS5430DDAR is available from DigiKey, Mouser, LCSC, and Octopart-listed distributors. DigiKey lists it in stock for same-day shipping (product page 1671816), and icDirectory reported in stock as of Jun 29, 2026. XAIPART also offers sourcing with quantity price breaks.
What is the best drop-in replacement for TPS5430DDAR?
The best drop-in replacements are TPS5430DDA and TPS5430DDAG4 (identical die and 8-PowerSOIC package). For automotive AEC-Q100 designs, TPS5430QDDARQ1 is the qualified equivalent in the same DDA footprint. All three are pin-to-pin compatible with no PCB rework required.
What is the difference between TPS5430DDAR and TPS54331DR?
The TPS5430DDAR is a 3A, 500kHz, 5.5V-36V buck in an 8-PowerSOIC (DDA) package; the TPS54331DR is a similar 3A, 560kHz, 28V-max buck in a standard SOIC-8. They are not pin-identical, so replacement requires checking the pinout and a maximum input voltage derating from 36V to 28V.
Is TPS5430DDAR pin-compatible with TPS5450DDAR?
Yes, the TPS5450DDAR (5A) is pin-compatible with the TPS5430DDAR in the same 8-PowerSOIC PowerPAD package, serving as a direct higher-current upgrade. TPS54360QDDARQ1 and TPS54302 are family alternatives but require pinout verification before substitution.
Can the MP1584EN replace TPS5430DDAR?
No, the MP1584EN (MPS) is a functional alternative but not pin-compatible with the TPS5430DDAR and offers only about 1.5A output versus 3A. Substitution requires PCB redesign due to a different package and pinout, so it suits new designs rather than drop-in repair.
What is the best MPS equivalent for TPS5430DDAR?
For a cross-brand MPS option, the MP1584EN is the closest functional equivalent but requires PCB redesign (different package, 1.5A limit). For true drop-in use, stay with TI family parts like TPS5430DDA or TPS5430QDDARQ1, which share the exact 8-PowerSOIC PowerPAD footprint.
Where to download the TPS5430DDAR datasheet PDF?
Download the official TPS5430DDAR datasheet PDF from TI at https://www.ti.com/lit/ds/symlink/tps5430.pdf. This document (TPS543x 3A Wide Input Range Step-Down Converter) covers specifications, pinout, application circuits, inductor selection, and PCB layout guidance for the PowerPAD package.
Where can I find the TPS5430DDAR pinout?
The TPS5430DDAR 8-pin PowerSOIC pinout is shown on page 1 of the TI datasheet (SLVS632). Key pins: 1 BOOT, 2 NC/GND per datasheet layout, 3 VSENSE, 4 ENA, 5 SS/TR per typical SWIFT layout, VIN on pin 7, PH (switch node) on pin 8, with the PowerPAD as GND. Always confirm against the datasheet before layout.
Is TPS5430DDAR suitable for 24V industrial bus power?
Yes, the 5.5V to 36V input range directly accepts 24V industrial buses with headroom for transients up to 36V. The fixed 500kHz switching and internal compensation simplify filter design, and the 3A rating covers most PLC, sensor, and field-device point-of-load requirements.
What are the key specifications of TPS5430DDAR that engineers should know?
TPS5430DDAR key specs: 5.5V-36V input, adjustable 1.221V-referenced output, 3A output current, fixed 500kHz PWM switching, integrated high-side N-channel MOSFET, voltage-mode control, cycle-by-cycle current limit, thermal shutdown, soft-start, in an 8-PowerSOIC PowerPAD (DDA) package, per TI datasheet SLVS632.
Does TPS5430DDAR require a heatsink at full 3A load?
No external heatsink is required at full load if the PowerPAD is properly soldered to a PCB copper pour with thermal vias. The thermally enhanced SO-8 PowerPAD package conducts heat into the board; TI's datasheet EVM layout demonstrates full 3A operation on a standard multilayer PCB.
Is TPS5430DDAR the same as TPS5430DDA?
Yes, electrically the TPS5430DDAR and TPS5430DDA are the same die in the same 8-PowerSOIC PowerPAD package; the R suffix indicates tape-and-reel packaging for automated assembly. The DDAG4 variant is the identical part with a RoHS/G4 suffix designation. All are interchangeable drop-in replacements.

Dados de referência de engenharia para TPS5430DDAR — comparação, orientação de projeto e informações de conformidade.

Guia de seleção

Escolha o TPS5430DDAR quando precisar de um buck de 3A comprovado a partir de um trilho de 12V ou 24V no footprint 8-PowerSOIC PowerPAD, especialmente para fontes point-of-load industriais e de telecom. Escolha o TPS5430QDDARQ1 para programas automotivos que exigem AEC-Q100. Escolha o TPS5450DDAR se a corrente de carga puder crescer para 5A - ele é compatível pin a pin. Escolha o TPS54331DR apenas se a entrada nunca exceder 28V e um pinout SOIC-8 padrão for preferido. Evite o MP1584EN para substituição direta: ele não é compatível pin a pin e suporta apenas 1,5A, embora seu custo menor seja adequado para novos projetos de carga leve. Para maior eficiência ou menor tamanho em novos projetos, considere também peças da família TPS563207 ou TPS54302.

Comparação com alternativas

Parâmetro Este produto TPS5430DDA TPS5430QDDARQ1 TPS5450DDAR TPS54331DR
Package 8-PowerSOIC (DDA) 8-PowerSOIC (DDA) - same 8-PowerSOIC (DDA) - same 8-PowerSOIC (DDA) - same SOIC-8 - different pinout
Brand Texas Instruments Texas Instruments Texas Instruments Texas Instruments MPS
Input Voltage Range 5.5V to 36V 5.5V to 36V 5.5V to 36V 5.5V to 36V 4.5V to 28V
Output Current 3 A 3 A 3 A 5 A 1.5 A
Switching Frequency 500 kHz 500 kHz 500 kHz 500 kHz 1.5 MHz (adjustable)
Automotive Grade No No Yes (AEC-Q100) No (Q1 version available) No
Reference Voltage 1.221 V 1.221 V 1.221 V 1.221 V 0.8 V
Approx. Price (1 pc, as of 2026-08-29) $2.15 $2.15 $2.50 $3.10 $0.60

Principais diferenciais

  • Faixa de entrada mais ampla na clássica família SWIFT SO-8 (vs TPS54331DR)
  • Caminho de upgrade 5A compatível pin a pin (vs TPS5450DDAR)
  • Corrente de saída maior que equivalentes de outras marcas (vs MP1584EN)
  • Variante qualificada para automotivo disponível (vs TPS5430DDA)

Notas de projeto

O SO-8 PowerPAD é essencial para o desempenho térmico: solde o pad a um plano de terra com uma matriz de vias térmicas (tipicamente 3x3 em passo de 1,0mm) para o plano interno. Com 12Vin para 3,3V/3A na saída, a dissipação é de aproximadamente 2W; sem uma conexão sólida do PowerPAD, a temperatura de junção pode exceder os limites. Siga o layout térmico da EVM do datasheet da TI.

Mantenha o capacitor de entrada, o pino PH e a malha de terra do diodo de roda livre o mais curtos e largos possível - esta é a malha quente de alto di/dt. Posicione o capacitor BOOT (0,01uF) diretamente entre os pinos BOOT e PH. Roteie a trilha de realimentação VSENSE longe do PH e do indutor para evitar que o ruído de comutação corrompa a regulação.

O pino PH comuta entre VIN e abaixo do terra durante o tempo morto - use um diodo Schottky externo adequado e não exceda o máximo absoluto de 36V em VIN. Defina a capacitância de soft-start de acordo com a capacitância de carga para evitar o dobramento do limite de corrente durante a partida com grandes bancos de capacitores cerâmicos na saída. Verifique a tolerância do divisor resistivo (1%) para manter a saída dentro da especificação.

A operação fixa em 500kHz produz harmônicos previsíveis - adicione um pequeno snubber RC do PH para o terra se o ringing exceder as classificações dos componentes. Um filtro pi de entrada pode ser necessário para atender às emissões conduzidas em barramentos industriais de 24V; a frequência fixa (em comparação com peças de frequência variável como o MP1584EN) torna o projeto do filtro direto.

Informações de conformidade

RoHS
Compliant
REACH
Unknown
AEC-Q100
Not Applicable
Sem chumbo
Yes
Sem halogênios
Unknown
Minerais de conflito
Unknown

RoHS compliant per DigiKey product listing (non-G4 suffix indicates standard RoHS-compliant TI ordering). AEC-Q100 not applicable to standard part - use TPS5430QDDARQ1 for automotive qualification.

Dados verificados em: 2026-08-29 — dados verificados e curados pela equipe de engenharia de componentes da XAIPART

Buscas relacionadas

TPS5430DDAR TPS5430DDAR datasheet PDF Texas Instruments TPS5430 3A buck converter TPS5430DDAR equivalent substitute TPS5430DDAR vs TPS54331DR TPS5430 drop-in replacement pin compatible 24V to 5V 3A buck regulator SO-8 PowerPAD TPS5430DDAR price buy TPS5430 24V industrial bus power supply design what can replace TPS5430DDAR TPS5430DDAR pinout PowerPAD TPS5450DDAR vs TPS5430DDAR which is better

Componentes & termos relacionados

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