Texas Instruments TPS543B20RVFR
| Parameters | |
|---|---|
| Series | SWIFT™ |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 40-LFQFN Exposed Pad |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Voltage - Input (Max) | 19V |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Current - Output | 25A |
| Supplier Device Package | 40-LQFN-CLIP (7x5) |
| Output Configuration | Positive |
| Function | Step-Down |
| Topology | Buck |
| Frequency - Switching | 300kHz ~ 2MHz |
| Synchronous Rectifier | Yes |
| Voltage - Output (Min/Fixed) | 0.6V |
| Voltage - Output (Max) | 5.5V |
| Voltage - Input (Min) | 4V |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | TPS543 |
| REACH Status | REACH Affected |
| Standard Package | 2,500 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
TPS543B20RVFR: High-Efficiency 25A Synchronous SWIFT™ Buck Converter with Adaptive Internal Compensation
The TPS543B20RVFR is a highly integrated synchronous step-down (buck) converter from Texas Instruments (TI), designed for high-performance power management in industrial, telecommunications, and computing applications. Operating with an input voltage range of 4V to 19V, it delivers a regulated output voltage from 0.6V to 5.5V at up to 25A continuous current (50A when stacked). Its advanced adaptive internal compensation eliminates the need for external compensation components, simplifying design while ensuring stability across a wide frequency range (300kHz to 2MHz). The device employs a peak current-mode control architecture with fixed-frequency PWM modulation, enabling precise voltage regulation and fast transient response. Key features include differential remote sensing for accurate output voltage measurement, programmable soft-start to limit inrush current, and high-precision hiccup current limiting for robust fault protection.
Engineered for efficiency and thermal performance, the TPS543B20RVFR integrates low-loss 4.1mΩ/1.9mΩ NexFET™ MOSFETs in a compact 40-pin 5mm × 7mm LQFN package with an exposed thermal pad. This design supports high-density PCB layouts while minimizing power dissipation. The converter supports clock synchronization to external systems, reducing EMI in noise-sensitive environments, and offers stackable operation for dual-phase configurations (up to 50A total load). Additional features include asynchronous pulse injection (API) and body braking to minimize output voltage undershoot/overshoot during load transients, enhancing system reliability. The device operates across a -40°C to +125°C temperature range, making it suitable for harsh industrial conditions.
Alternative Models and Key Differences
● TPS543C20RVFR: A 40A-capable variant with a 4V to 14V input range, optimized for mid-power applications requiring higher current density.
● TPS543B25RVFR: Similar to TPS543B20RVFR but supports 25A output with enhanced thermal performance in a thermally enhanced package.
● TPS543B22RVSR: A 20A alternative with a 4V to 18V input range, ideal for cost-sensitive designs requiring moderate power delivery.
