TPS54218 - 2A, 2MHz Sync Buck Converter | TI | Point-of-Load
Référence : TPS54218 ✓ Actif| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour TPS54218 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
TPS54418
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TPS54318
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TPS54218 Valeurs maximales et caractéristiques électriques
| Topologie | Synchronous Step-Down (Buck) |
| Plage de tension d'entrée | 2.95 V to 6 V |
| Output Current | 2 A |
| Tension de sortie | Adjustable, 0.803 V minimum |
| Voltage Reference | 0.8 V +/-1% over temperature |
| Fréquence de commutation | 200 kHz to 2 MHz (programmable) |
| High-Side / Low-Side MOSFET Rds(on) | 30 mOhm (typical), integrated |
| Control Method | Current Mode |
| Courant d'alimentation | 350 uA (typical operating) |
| Shutdown Supply Current | 2 uA (via EN pin) |
| Synchronization | External clock sync supported |
| Démarrage progressif | Adjustable / sequencing via SS/TR |
| Power Good | UV and OV power-good output |
| Boîtier | 16-WFQFN Exposed Pad (RTE), 3 mm x 3 mm |
| Type de montage | Surface Mount |
| Nombre de sorties | 1 |
Guide de configuration des broches du TPS54218 16-wfqfn exposed pad (rte), 3 mm x 3 mm
Configuration des broches du TPS54218 (boîtier 16-wfqfn exposed pad (rte), 3 mm x 3 mm). Ce composant de puissance comporte des bornes de grille, de drain et de source. Pour les boîtiers non polarisés, consultez la fiche technique du fabricant pour l'orientation exacte de la broche 1 et les détails de l'empreinte. Les applications courantes incluent la conception d'alimentations, la commande de moteurs et la commutation de charges.
Aucune donnée de brochage détaillée disponible pour TPS54218.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
TPS54218 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TPS54218 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Up to 2-MHz operation minimizes solution size (vs MP2307)
- +/-1% reference over temperature for accurate low-voltage cores (vs TPS54418)
- Low 2-uA shutdown current (vs TPS54318)
Notes de conception
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.
Informations de conformité
Compliance status not stated in the provided verified web data; consult TI product page quality/environmental data for TPS54218.
