TPS548B28RWWR - 20A 16V Sync Buck Converter | TI | Datacenter
Référence : TPS548B28RWWR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1 | $1,00 |
TPS548B28RWWR Présentation
A synchronous buck converter is a DC-DC switching regulator that steps a higher input voltage down to a lower output voltage using two integrated switches (high-side and low-side MOSFETs) plus an external inductor. Within the power management hierarchy, the TPS548B28 belongs to the switching regulator family, positioned as a single-channel point-of-load (POL) solution between simple low-current bucks and multi-phase controllers.
Key features include a 4V to 16V input range supporting 20A continuous output without external bias, extended 2.7V operation with a 3.13V to 3.6V external bias, an output voltage range of 0.6V to 5.5V, and integrated 7.7-mΩ high-side and 2.4-mΩ low-side MOSFETs. The device offers fast load-transient response, accurate load and line regulation, Skip-mode or forced-CCM (FCCM) operation for light-load efficiency trade-offs, programmable soft start, and hiccup current limit for fault robustness.
The D-CAP3-style control architecture enables a small external component count and fast transient response with low output capacitance, well suited to space-constrained boards. The internal 3V LDO can be overridden by an external bias rail to improve efficiency at lower input voltages. Differential remote sense compensates for PCB IR drop, maintaining ±1% regulation at the load point.
Typical applications include server and storage point-of-load rails (DSP, FPGA, ASIC, and processor cores), datacenter and networking card power, and general industrial 20A-class low-voltage supplies. Reference design support is available via the TPS548B28EVM-023 evaluation module.
Design consideration: at 20A loads, minimize the SW-node copper area and optimize the input capacitor loop to control EMI; verify thermal performance since total MOSFET conduction plus switching losses concentrate in the small QFN footprint.
Alternatives de remplacement direct pour TPS548B28RWWR — 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 :
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesTPS548B28RWWR Valeurs maximales et caractéristiques électriques
| Topologie | Synchronous Step-Down (Buck) Converter |
| Input Voltage Range (no external bias) | 4 V to 16 V |
| Input Voltage Range (with external bias) | 2.7 V to 16 V |
| External Bias Range | 3.13 V to 3.6 V |
| Courant de sortie maximal | 20 A |
| Plage de tension de sortie | 0.6 V to 5.5 V |
| Tension de référence | 0.6 V ±1% over junction temperature |
| High-Side MOSFET RDS(on) | 7.7 mΩ |
| Low-Side MOSFET RDS(on) | 2.4 mΩ |
| Remote Sense | Differential remote sense |
| Light Load Mode | Skip-mode or FCCM (selectable) |
| Limitation de courant | Hiccup mode current limit |
| Démarrage progressif | Programmable |
| Internal LDO | 3 V internal LDO |
| Boîtier | 21-PowerVFQFN (RWW) |
| Type de montage | Surface Mount |
Configuration des broches de TPS548B28RWWR
| Broche 20 | SW — Switch node - connects to output inductor; per TI E2E forum, SW sends PWM to the inductor which maintains steady output current |
| Broche [DATA_NEEDED] | VIN — Input supply |
| Broche [DATA_NEEDED] | GND — Ground |
| Broche [DATA_NEEDED] | VOUT/SENSE — Differential remote sense inputs |
| Broche [DATA_NEEDED] | BOOT — High-side gate drive bootstrap |
| Broche [DATA_NEEDED] | EN — Enable |
| Broche [DATA_NEEDED] | SS/VSEL — Soft start / mode configuration |
| Broche [DATA_NEEDED] | BIAS/VDD — External bias input for internal LDO bypass |
Applications typiques
TPS548B28RWWR convient pour 3 applications: Gestion de l'alimentation, Commande de moteur, Éclairage LED.
Gestion de l'alimentation
Commutation et régulation dans les circuits d'alimentation à l'aide de TPS548B28RWWR.
Commande de moteur
Pilotage et commande de moteurs CC/BLDC avec TPS548B28RWWR.
Éclairage LED
Pilotage de chaînes et matrices de LED avec TPS548B28RWWR.
Aucune FAQ disponible pour ce produit.
Données de référence d'ingénierie pour TPS548B28RWWR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Principaux différenciateurs
- Differential remote sense for ±1% load-point accuracy (vs TPS53622RSBT)
- Integrated 7.7 mΩ / 2.4 mΩ MOSFETs (vs TPS53355)
- Internal 3V LDO with external bias override (vs TPS548B28EVM-023 reference configuration)
Notes de conception
Keep the input capacitor to VIN/GND loop as small as possible; the 20A pulsed currents in this loop dominate EMI. Per the TI datasheet layout section, place ceramic input capacitors directly at the VIN pins and use the PowerVFQFN thermal pad with a multi-layer via array to the ground plane for heat spreading.
Conduction losses are roughly I^2 x (RDSon_HS x D + RDSon_LS x (1-D)); with 7.7 mΩ and 2.4 mΩ MOSFETs, duty cycle strongly affects thermals. At 12V-to-1V, 20A designs, evaluate switching loss and consider Skip-mode only at light load, since FCCM improves transient response for processor cores.
Do not attempt to parallel multiple TPS548B28 outputs - per TI E2E forum, the device does not support paralleling; for higher current use a controller such as TPS53355. The 4V minimum input applies without external bias; below 4V, supply a 3.13V-3.6V bias to extend operation down to 2.7V.
Informations de conformité
Compliance data not present in provided verified web data; check TI product page for RoHS/REACH status.
