TPS548B28RWWR - 20A 16V Sync Buck Converter | TI | Datacenter
MPN: TPS548B28RWWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1 | $1.00 |
Drop-in alternatives for TPS548B28RWWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesTPS548B28RWWR Maximum Ratings & Electrical Characteristics
| Topology | 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 |
| Maximum Output Current | 20 A |
| Output Voltage Range | 0.6 V to 5.5 V |
| Reference Voltage | 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) |
| Current Limit | Hiccup mode current limit |
| Soft Start | Programmable |
| Internal LDO | 3 V internal LDO |
| Operating Temperature | [DATA_NEEDED: operating junction temperature range] |
| Package | 21-PowerVFQFN (RWW) |
| Mounting Type | Surface Mount |
| RoHS Status | [DATA_NEEDED: RoHS status] |
TPS548B28RWWR Pin Configuration
| Pin 20 | SW — Switch node - connects to output inductor; per TI E2E forum, SW sends PWM to the inductor which maintains steady output current |
| Pin [DATA_NEEDED] | VIN — Input supply |
| Pin [DATA_NEEDED] | GND — Ground |
| Pin [DATA_NEEDED] | VOUT/SENSE — Differential remote sense inputs |
| Pin [DATA_NEEDED] | BOOT — High-side gate drive bootstrap |
| Pin [DATA_NEEDED] | EN — Enable |
| Pin [DATA_NEEDED] | SS/VSEL — Soft start / mode configuration |
| Pin [DATA_NEEDED] | BIAS/VDD — External bias input for internal LDO bypass |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS548B28RWWR is suitable for 3 applications: Power Management, Motor Control, LED Lighting.
Power Management
Switching and regulation in power supply circuits using TPS548B28RWWR.
Motor Control
Driving and controlling DC/BLDC motors with TPS548B28RWWR.
LED Lighting
Driving LED strings and arrays with TPS548B28RWWR.
No FAQ available for this product.
Engineering reference data for TPS548B28RWWR — comparison, design guidance, and compliance information.
Selection Guide
Key Differentiators
- 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)
Design Notes
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.
Compliance Information
Compliance data not present in provided verified web data; check TI product page for RoHS/REACH status.
