Texas Instruments 3A 3.5V–28V Synchronous Step-Down Converter · 570kHz · HTSSOP-14 · Drone companion computer and peripheral power supply
| Parameter | Value |
|---|---|
| Topology | Synchronous PWM buck |
| Input Voltage | 3.5V – 28V |
| Output Current | 3A continuous |
| Output Voltage | 0.8V – 25V (adjustable via external R) |
| Switching Frequency | 570 kHz (fixed) |
| Package | HTSSOP-14 (PowerPAD) |
| Efficiency | Up to 92% (5V out @ 3A from 12V) |
| Operating Temp | -40°C to +85°C |
| Parameter | Value |
|---|---|
| Feedback Voltage | 0.8V (±1%) |
| OCP (Cycle-by-cycle) | ~4A |
| Soft Start | External capacitor programmable |
| Thermal Shutdown | 150°C, 10°C hyst |
| Quiescent Current | 110 µA |
| Output Ripple (typ) | 30 mV p-p |
| Parameter | Value |
|---|---|
| Part Number | TPS54331DDAR |
| Package | HTSSOP-14 |
| RoHS | Compliant |
| MOQ | 1 pcs |
| Lead Time | In Stock |
The TPS54331 bridges TI's mid-range synchronous buck portfolio, covering 3.5V–28V input with synchronous rectification for lower loss vs the TPS5430. It outputs 3A and operates at 570kHz, making it well-suited for 3S (12.6V) or 4S (16.8V) LiPo applications powering companion computers like Raspberry Pi or NVIDIA Jetson in drone systems.
The HTSSOP-14 package with exposed PowerPAD provides better thermal performance than SOT-23 alternatives. The programmable soft-start via external capacitor prevents inrush current during power-up of capacitive loads.