Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Topology | Synchronous step-down (buck) |
| Input Voltage | 4.5 V to 28 V |
| Output Current | Up to 3 A |
| Switching Frequency | 400 kHz fixed |
| Power Switches | Integrated high-side and low-side MOSFETs |
| Soft Start | 5 ms internal |
| Package | DDC / TSOT-23-6 |
| Manufacturer Status | Active |
Product Overview
TPS54302DDCR is a compact 3 A synchronous buck converter from Texas Instruments. The device accepts 4.5 V to 28 V input and operates at a fixed 400 kHz switching frequency, making it useful for stepping common 12 V and 24 V rails down to lower point-of-load voltages when the required current and thermal conditions fit the 3 A class.
Both switching MOSFETs and loop compensation are integrated. This reduces external component count, while spread-spectrum operation helps distribute switching energy for EMI-sensitive designs. The DDC six-pin package keeps the footprint small, so PCB thermal design and current-loop layout remain important even though the control implementation is simplified.
Technical Specifications
| Group | Parameter | Value / Condition |
|---|---|---|
| Power | Topology | Synchronous buck |
| Input | VIN | 4.5 V to 28 V |
| Output | Current | Up to 3 A |
| Switching | Frequency | 400 kHz fixed |
| Control | Compensation | Internal loop compensation |
| Startup | Soft start | 5 ms internal |
| EMI | Feature | Spread spectrum |
| Power | Shutdown current | 2 µA typical |
| Power | Quiescent current | 45 µA typical |
| Package | Type | DDC / TSOT-23-6 |
| Operating | Junction temperature | -40 °C to +125 °C |
Product Status
| Item | Information |
|---|---|
| Manufacturer Status / Lifecycle | Active |
Texas Instruments currently lists TPS54302 and the exact TPS54302DDCR orderable device as active.
Functional Highlights
Wide input range covers common industrial rails
The 4.5 V to 28 V input range allows one regulator family to work from several intermediate bus voltages while retaining synchronous conversion.
Small package shifts attention to layout and thermal performance
Integrated MOSFETs and compensation reduce component count, but the compact package requires careful grounding, input bypass placement and copper area at multi-amp load currents.
Applications / Application Fit
- 12 V and 24 V bus point-of-load conversion
- Industrial and consumer embedded power rails
- Distributed power systems requiring a compact 3 A buck stage
Design Considerations
Select the inductor from ripple-current, saturation-current and transient requirements rather than current rating alone.
Place the input bypass capacitor and switching loop components close to the IC to reduce ringing and EMI.
Check junction temperature at the actual VIN, VOUT, load and PCB copper area; 3 A capability is not independent of conversion loss and ambient temperature.
Related Engineering Resources
- Texas Instruments official product/family page — manufacturer-controlled product information and documentation.
- TPS54302DDCR verified Datasheet PDF — identity-verified PDF hosted on HKEQGOO assets.
Alternative Candidates for Engineering Evaluation
| MPN | Manufacturer | Package |
|---|---|---|
| TPS54302DDCT | Texas Instruments | TSOT-23-6 |
| TPP303080-T6TR | 3PEAK | TSOT-23-6 |
Candidate alternative parts require engineering verification before substitution. Electrical characteristics, pinout, package, qualification, and application requirements should be verified before use.
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
