TPS54302DDCR - 3A 4.5-28V Sync Buck | Texas Instruments
N.º da peça: TPS54302DDCR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1.15 | $1,15 |
| 10 | $1.03 | $10,30 |
| 100 | $0.79 | $79,00 |
| 500 | $0.55 | $275,00 |
| 1.000 | $0.42 | $420,00 |
TPS54302DDCR Visão geral
A synchronous buck converter is a DC-DC switching regulator in which a high-side and a low-side power FET switch alternately to convert a higher input voltage to a lower regulated output with high efficiency. It belongs to the switching regulator family within the power management IC hierarchy. Because the low-side FET replaces the Schottky diode of asynchronous converters, conduction losses drop and heavy-load efficiency improves significantly. The TPS54302 uses constant-frequency peak current-mode control at approximately 400kHz, providing fast line and load transient response and reducing required output capacitance.
Key features include 3A continuous output current, a wide 4.5V to 28V input range, and a 5ms internal soft start that limits inrush current at power-up. Advanced Eco-mode delivers high light-load efficiency, and the EMI-friendly switching-edge design reduces the need for extra filtering in noise-sensitive products such as wireless IoT gateways. The TSOT-23-6 package occupies minimal board area and supports reflow up to 260C.
Typical applications include industrial 24V and 12V rails, set-top boxes, battery-powered portable equipment, networking hardware, smart-home IoT gateways, and LED display control power. The wide input range plus 3A output make it a versatile point-of-load regulator, and the EMI-friendly design is valuable wherever RF sensitivity could be degraded by switching noise.
Design tip: place input and output ceramic capacitors close to the IC, choose a power inductor with saturation current above 3.2A, and set the output voltage with 1% tolerance resistors on the 0.596V reference. Since 28V is the maximum rating, add transient protection if input spikes above 28V are possible.
Alternativas drop-in para TPS54302DDCR — 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 TPS54302DDCR (mesmo formato e footprint) — diferindo em Package, Output Voltage Range, Switching Frequency, Input Voltage Range, Maximum Output Current.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TPS54202DDCR
✅ Drop-In✓ Em estoque
$0.12 / unidade
Ver ficha técnica →TPS54302QDDCRQ1
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.05 / unidade
Ver ficha técnica →ET8133
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS54302DDCR Classificações máximas e características elétricas
| Topologia | Synchronous Step-Down (Buck) |
| Faixa de tensão de entrada | 4.5 V to 28 V |
| Corrente máxima de saída | 3 A |
| Output Voltage Minimum | 0.596 V (reference) |
| Número de saídas | 1 |
| Frequência de comutação | 400 kHz |
| Control Topology | Peak Current Mode |
| Internal Soft Start | 5 ms |
| Integrated FETs | 2 switching N-channel MOSFETs |
| Light-Load Mode | Eco-mode |
| EMI Features | EMI-friendly switching edge |
| Temperatura de operação | -40C to +125C (TJ) |
| Encapsulamento | SOT-23-6 Thin (TSOT-23-6, DDC) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do TPS54302DDCR
| Pino 1 | GND — Ground reference |
| Pino 2 | EN — Enable input for power sequencing |
| Pino 3 | BOOT — High-side FET gate-drive bootstrap (connect capacitor to SW) |
| Pino 4 | VIN — Input supply, 4.5V to 28V |
| Pino 5 | SW — Switching node to inductor |
| Pino 6 | VSENSE — Feedback input for output voltage regulation (0.596V reference) |
Aplicações típicas
TPS54302DDCR é adequado para 6 aplicaçãos: Industrial 24V Power Rails, Smart-Home IoT Gateways, Networking and Set-Top Equipment, Battery-Powered Portable Devices, LED Display Control Power, FPGA and SoC Point-of-Load.
Industrial 24V Power Rails
The TPS54302's 4.5V-28V input range directly accepts 24V industrial buses with margin below the 28V absolute maximum. Delivering 3A at 400kHz with integrated FETs, it converts 24V down to 5V or 3.3V logic rails for PLCs, sensors, and motor-control boards. Its peak current-mode control gives fast transient response to inductive load steps, and the EMI-friendly switching edge helps meet industrial EMC requirements without bulky filters. Choose an inductor with saturation current above 3.2A and clamp input transients that could exceed 28V.
Recomendado
Smart-Home IoT Gateways
Wireless IoT gateways combine RF front ends, MCUs, and Ethernet PHYs whose sensitivity degrades with switching noise. The TPS54302's EMI-friendly switching-edge design reduces conducted and radiated emissions at the source, easing coexistence with 2.4GHz radios. The 5ms soft start limits inrush on constrained power sources, and Eco-mode keeps light-load efficiency high during sleep-dominated duty cycles. Converting 12V or 24V adapters down to 3.3V at up to 3A, it powers SoCs and radios from one compact TSOT-23-6 device.
Recomendado
Networking and Set-Top Equipment
Routers, switches, and set-top boxes require dense point-of-load conversion from 12V front ends. The TPS54302 integrates both switching FETs and loop compensation, shrinking the regulator footprint to a few square millimeters around the TSOT-23-6 package. Its 400kHz fixed frequency allows small inductors while staying below sensitive broadcast bands. The 3A capacity covers main SoC and memory rails, and fast current-mode loop response handles the sharp load transients of streaming SoCs without large output capacitor banks.
Recomendado
Battery-Powered Portable Devices
Portable instruments and battery packs benefit from the TPS54302's wide input tolerance, which accepts 4S lithium stacks (up to 16.8V) as well as USB-C PD supplies near 20V. Eco-mode pulse-skipping preserves battery runtime at light standby loads, while the 5ms internal soft start prevents inrush spikes when hot-plugging the battery. A single TSOT-23-6 regulator plus one inductor and ceramic caps can supply a 3.3V, 3A system rail, minimizing board area in handheld enclosures.
Recomendado
LED Display Control Power
LED display panels and signage controllers need robust 5V or 3.3V rails derived from 24V wiring looms. The TPS54302 handles this 24V-to-5V conversion at up to 3A, powering gate drivers and controller logic for LED matrices. The fixed 400kHz switching keeps operation out of visible flicker frequencies and simplifies EMI qualification in installations with long cables. Peak current-mode control provides inherent cycle-by-cycle current limiting that protects the converter during LED string faults.
Recomendado
FPGA and SoC Point-of-Load
FPGAs, DSPs, and application processors require tightly regulated low-voltage cores as low as 0.596V, exactly the TPS54302 reference floor. Its accurate current-mode loop holds tight output tolerance against the sub-amp to multi-amp load transients typical of SoC power management, and the 5ms soft start supports sequenced power-up schemes controlled via the EN pin. Compared with discrete solutions, the integrated FETs and compensation remove tuning effort, letting the same layout be reused across 0.9V, 1.2V, and 1.8V rails.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TPS54302DDCR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TPS54202DDCR | TPS54302QDDCRQ1 | ET8133 |
|---|---|---|---|---|
| Package | TSOT-23-6 (DDC) | TSOT-23-6 (DDC) - same | TSOT-23-6 (DDC) - same | TSOT-23-6 (DDC) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | ETEK |
| Output Current | 3 A | 2 A | 3 A | 3 A |
| Automotive Grade | No | No | Yes (AEC-Q100) | No |
| Pin Compatibility | Reference (GND/EN/BOOT/VIN/SW/VSENSE) | Pin-to-pin | Pin-to-pin | Pin-to-pin |
Principais diferenciais
- 3A output in minimal 6-pin footprint (vs TPS54202DDCR)
- EMI-friendly switching edge (vs ET8133)
- Automotive path with same die (vs TPS54302QDDCRQ1)
Notas de projeto
Place the input ceramic capacitor (10uF recommended) and output capacitor as close as possible to VIN and GND pins, keeping the loop from input cap through VIN, SW, inductor, and output cap tight. The BOOT capacitor must sit directly between BOOT and SW. Use the thermal pad as the main ground return with multiple vias to the ground plane - the underside pad is critical for both grounding and heat dissipation in the TSOT-23-6 package.
Select a power inductor with a saturation current above 3.2A to maintain margin over the 3A load current and account for peak current-mode ripple. For 24V-to-5V conversion at 3A, dissipate attention on input protection: 28V is the absolute maximum, so add a TVS diode if industrial 24V surges are possible. Set the output with 1% tolerance resistors since VSENSE accuracy directly scales with divider precision.
The TPS54302's EMI-friendly switching edge reduces high-frequency ringing on SW, but SW-node copper area should still be minimized to limit radiated emissions. Keep the inductor close to SW, avoid routing feedback traces near SW or inductor, and route VSENSE as a Kelvin connection to the output capacitor. This is especially important in RF-sensitive designs such as IoT gateways.
Informações de conformidade
RoHS compliant per TI product listing. Standard TPS54302DDCR is not AEC-Q100 qualified; use TPS54302QDDCRQ1 for automotive. REACH, halogen-free, and conflict-minerals status not stated in provided data - verify on TI quality pages.
