TPS54218 - 2A, 2MHz Sync Buck Converter | TI | Point-of-Load
N.º de pieza: TPS54218 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.55 | $25,50 |
| 100 | $2.15 | $215,00 |
| 500 | $1.85 | $925,00 |
| 1.000 | $1.6 | $1.600,00 |
TPS54218 Descripción general
A DC-DC switching regulator (buck converter) is a power-management IC that converts a higher input voltage to a lower output voltage using high-frequency switching and an external inductor, achieving far higher efficiency than a linear regulator. The TPS54218 sits within the SWIFT family of point-of-load converters optimized for distributed power architectures.
Key features include a programmable switching frequency from 200 kHz to 2 MHz, which reduces inductor size and solution footprint; a 0.8V voltage reference with +/-1% accuracy over temperature; current-mode control for simplified loop compensation and fast transient response; synchronization to an external clock; and adjustable soft start or power sequencing via the SS/TR pin. Under-voltage and over-voltage power-good output provides rail supervision. Efficiency is maximized by the integrated 30-mOhm MOSFETs and a typical 350-uA supply current; using the EN pin, shutdown current is reduced to 2 uA.
The current-mode architecture enables small external component count and compact solutions. Up to 2-MHz operation allows the use of low-profile inductors, making the part well suited to space-constrained boards.
Typical applications include point-of-load regulation for DSPs, FPGAs, and ASICs, 5V or 3.3V distributed-power rails in industrial and networking equipment, and portable/battery-connected systems needing high efficiency at 2A loads.
Design tip: operating at 2 MHz reduces inductance requirements but increases switching losses; balance frequency against efficiency using the datasheet equations, and place the input capacitor, inductor, and BOOT capacitor close to the IC pins.
Alternativas directas para TPS54218 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS54418
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS54318
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS54218 Valores máximos y características eléctricas
| Topología | Synchronous Step-Down (Buck) |
| Rango de tensión de entrada | 2.95 V to 6 V |
| Output Current | 2 A |
| Tensión de salida | Adjustable, 0.803 V minimum |
| Voltage Reference | 0.8 V +/-1% over temperature |
| Frecuencia de conmutación | 200 kHz to 2 MHz (programmable) |
| High-Side / Low-Side MOSFET Rds(on) | 30 mOhm (typical), integrated |
| Control Method | Current Mode |
| Corriente de alimentación | 350 uA (typical operating) |
| Shutdown Supply Current | 2 uA (via EN pin) |
| Synchronization | External clock sync supported |
| Arranque suave | Adjustable / sequencing via SS/TR |
| Power Good | UV and OV power-good output |
| Encapsulado | 16-WFQFN Exposed Pad (RTE), 3 mm x 3 mm |
| Tipo de montaje | Surface Mount |
| Número de salidas | 1 |
Guía de configuración de pines de TPS54218 16-wfqfn exposed pad (rte), 3 mm x 3 mm
Configuración de pines para TPS54218 (encapsulado 16-wfqfn exposed pad (rte), 3 mm x 3 mm). Este dispositivo de potencia presenta terminales de puerta, drenador y fuente. Para encapsulados no polarizados, consulte la hoja de datos del fabricante para conocer la orientación exacta del pin 1 y los detalles del footprint. Las aplicaciones habituales incluyen el diseño de fuentes de alimentación, el accionamiento de motores y la conmutación de cargas.
No hay datos detallados de patillaje disponibles para TPS54218.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
TPS54218 es adecuado para 6 aplicacións: Point-of-Load for DSP and FPGA, 5V Distributed Power Systems, Networking and Communications Equipment, Industrial Automation Controls, Battery-Powered Portable Equipment, Test and Measurement Instruments.
Point-of-Load for DSP and FPGA
The TPS54218 fits point-of-load regulation for DSPs, FPGAs, and ASICs that run from 5V or 3.3V intermediate rails and need core voltages down to 0.803V at up to 2A. Its +/-1% 0.8V reference over temperature keeps tight core-voltage tolerance, while current-mode control delivers fast transient response to load steps. Up to 2-MHz switching permits low-profile inductors close to the processor. The UV/OV power-good output lets a supervisor sequence the rail with other supplies; the SS/TR pin supports controlled startup sequencing.
Recomendado
5V Distributed Power Systems
In 5V intermediate-bus architectures, the TPS54218's 2.95V-6V input range covers 5V rails with margin. The integrated 30-mOhm MOSFETs maximize efficiency at 2A loads, reducing heat in dense boards, and the 350-uA operating supply current cuts standby draw. External clock synchronization lets multiple converters share a frequency or stagger phases to minimize input ripple. Its 3-mm x 3-mm WQFN footprint suits high-density backplane and shelf cards where board area and thermal budget are both constrained.
Recomendado
Networking and Communications Equipment
Switch, router, and optical-module line cards require compact, efficient, low-noise PoL supplies. The TPS54218's external clock synchronization avoids beat-frequency noise between multiple converters on shared rails, improving EMI performance in communication systems. At 2-MHz operation the switching harmonics move above sensitive bands, simplifying filter design. The power-good flag supports fault reporting to the system controller, and the 2-uA shutdown mode via EN enables per-rail power management for energy-efficient operation.
Recomendado
Industrial Automation Controls
Industrial controllers and I/O modules derive 3.3V/2.5V/1.8V logic rails from 5V supplies. The TPS54218 provides accurate +/-1% regulation over temperature for noise-sensitive analog and digital loads, with current-mode control easing compensation across varying loads. Its adjustable soft start limits inrush during system power-up, protecting upstream fuses and supplies. The thermally-enhanced exposed-pad WQFN package withstands elevated cabinet ambient temperatures when proper copper pours are applied on the PCB.
Recomendado
Battery-Powered Portable Equipment
For single-cell Li-ion systems near end-of-discharge (approximately 3.0V-4.2V), the TPS54218's 2.95V minimum input extends usable battery voltage range. The 2-uA shutdown current via the EN pin preserves battery life in standby, while integrated 30-mOhm MOSFETs sustain efficiency at 2A burst loads such as wireless transmit or display refresh. Small 3-mm x 3-mm WQFN and up to 2-MHz operation shrink the power section for handheld and portable instrument form factors.
Recomendado
Test and Measurement Instruments
Bench instruments and modular measurement cards need clean, accurate low-voltage rails for ADCs, clocking, and FPGAs. The TPS54218's +/-1% reference ensures rail accuracy, and its high 2-MHz capability moves switching noise away from sensitive signal bands; an optional post LDO can further cut ripple for analog sections. Power-good supervision supports self-test at boot, and adjustable soft start prevents rail overshoot that could stress sensitive converters and sensors during instrument turn-on.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS54218 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS54418 | TPS54318 | MP2307 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Monolithic Power Systems (MPS) |
| Package | 16-WQFN (RTE) 3x3 mm exposed pad | WQFN-16 (RTE) - verify footprint | WQFN-16 (RTE) - verify footprint | SOIC-8 - different package |
| Output Current | 2 A | 4 A class (higher) | 3 A class (higher) | 3 A |
| Drop-in Compatibility | - | Same family - verify pinout | Same family - verify pinout | No - PCB redesign required |
Diferenciadores clave
- Up to 2-MHz operation minimizes solution size (frente a MP2307)
- +/-1% reference over temperature for accurate low-voltage cores (frente a TPS54418)
- Low 2-uA shutdown current (frente a TPS54318)
Notas de diseño
Place the input ceramic capacitor, output inductor, and BOOT capacitor as close as possible to the TPS54218 pins. Connect PGND and AGND at a single star point; use the exposed thermal pad as the main ground connection with a array of thermal vias to inner ground planes. TI datasheet layout guidelines (SLVSAXX series, TPS54218 datasheet section on application/layout) recommend minimizing the PH-node loop area to reduce radiated EMI.
At 2A output with a 5V input and 1.8V output, conduction losses are dominated by the integrated 30-mOhm MOSFETs. The thermally-enhanced 3x3 mm WQFN relies on PCB copper for heat spreading; provide at least 2 square inches of ground-plane copper or thermal vias to keep junction temperature within limits in elevated-ambient industrial environments.
A buck converter that shares a footprint is not automatically a drop-in replacement - as TI E2E forum discussions of TPS54218 replacements note, compensation, frequency setting, and pin functions can differ between family members. Verify pinout and re-tune the compensation network (COMP) when substituting. Do not omit the BOOT capacitor or set soft-start time shorter than needed for heavy load prebias.
Información de cumplimiento
Compliance status not stated in the provided verified web data; consult TI product page quality/environmental data for TPS54218.
