TPS54302DDCR - 3A EMI-Friendly Synchronous Buck Converter | TI
MPN: TPS54302DDCR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.16 | $1.16 |
| 10 | $1.03 | $10.30 |
| 100 | $0.83 | $83.00 |
| 500 | $0.73 | $365.00 |
| 1,000 | $0.63 | $630.00 |
| 3,000 | $0.58 | $1,740.00 |
Drop-in alternatives for TPS54302DDCR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS54202DDCR
β Drop-Inπ Reference alternative (not in catalog)
TPS54308DDCR
β Drop-Inπ Reference alternative (not in catalog)
TPS563201DDCR
β Drop-Inπ Reference alternative (not in catalog)
ET8133
β Drop-Inπ Reference alternative (not in catalog)
RT6215B
β Drop-Inπ Reference alternative (not in catalog)
TPS54302DDCR Maximum Ratings & Electrical Characteristics
| Function | Synchronous step-down (buck) converter |
| Input Voltage Range | 4.5 V to 28 V |
| Output Current | 3 A |
| Output Type | Positive, adjustable |
| Output Reference Voltage | 0.596 V |
| Number of Outputs | 1 |
| Integrated Switching FETs | Two integrated n-channel MOSFETs |
| Control Scheme | Constant-frequency, peak current-mode control |
| Internal Compensation | Yes |
| Internal Soft Start | 5 ms |
| EMI Features | EMI-Friendly |
| Eco-Mode | Advanced Eco-mode |
| Package | SOT-23-6 Thin (TSOT-23-6) |
| Pin Count | 6 |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40Β°C to +85Β°C |
| MSL Level | Level-1-260C-UNLIM |
| RoHS Compliance | Compliant |
| REACH Compliance | unknown |
| Switching Frequency | [DATA_NEEDED: switching frequency] |
| Quiescent Current | [DATA_NEEDED: quiescent current] |
TPS54302DDCR Pin Configuration
| Pin 1 | BOOT β Bootstrap capacitor connection for high-side FET driver |
| Pin 2 | VIN β Input supply voltage, 4.5V to 28V |
| Pin 3 | EN β Enable control input |
| Pin 4 | FB β Feedback voltage sense, regulates to 0.596V reference |
| Pin 5 | GND β Ground |
| Pin 6 | SW β Switch node output connected to inductor |
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
TPS54302DDCR is suitable for 6 applications: Industrial 24V/12V Power Rail, Consumer Set-Top Boxes and TVs, Portable and Battery-Powered Equipment, Networking and Communication Equipment, Smart Home and IoT Gateways, LED Lighting and Display Backlight Power.
Industrial 24V/12V Power Rail
TPS54302DDCR's 4.5V-28V input range and 3A output make it a natural fit for industrial 24V distributed power systems, PLCs, and factory automation. With integrated FETs and internal loop compensation, it can drop a 24V bus to 5V or 3.3V while occupying a tiny SOT-23-6 footprint. The 5ms soft start limits inrush, and the EMI-friendly design reduces the need for large LC filters in electrically noisy environments. Placed after an input bulk capacitor and a load switch such as the TPS22997, it can power sensors, actuators, and microcontroller rails reliably. The 28V absolute maximum provides adequate headroom for 24V rails with switching transients.
Recommended
Consumer Set-Top Boxes and TVs
In consumer electronics, clean yet efficient power conversion is essential. TPS54302DDCR converts a 12V adapter output to a 3.3V/5V rail for SoCs, HDMI/display controllers, and tuner circuits. The 3A current capability supports multiple rails and peripheral loads, while synchronous rectification maintains high efficiency at typical loads. The SOT-23-6 package and minimal external component count enable compact, low-height board designs. Its EMI-friendly architecture helps pass radiated emission limits without expensive shielding. A load switch like the TPS22997 can be cascaded for sequenced power-down of display sub-systems.
Recommended
Portable and Battery-Powered Equipment
For portable devices requiring a regulated 3.3V or 5V rail from a 2-4S Li-ion stack or 12V adapter, TPS54302DDCR's wide input range provides flexibility. Its 3A output powers application processors, displays, and motors, while advanced Eco-mode maintains high efficiency at light loads, extending battery life. The 5ms internal soft start prevents voltage dip on the source battery when modules power up. The TSOT-23-6 package fits space-constrained handheld designs. Pair with a TPS22997 load switch for peripheral power gating during standby, reducing leakage currents to sleep-level consumption.
Recommended
Networking and Communication Equipment
Networking gear such as switches, routers, and small-cell units often use 12V or 24V intermediate buses. TPS54302DDCR steps down 12V/24V to core or I/O rails at up to 3A. Constant-frequency, peak current-mode control gives fast line/load transient response, reducing output capacitance. EMI-friendly operation minimizes interference with adjacent RF receivers in dense communication boards. The device's internal compensation simplifies BOM; a typical application uses one small inductor and ceramic output capacitors. For high-availability systems, adding a TPS22997 load switch allows per-rail sequencing and fault isolation.
Recommended
Smart Home and IoT Gateways
Smart home gateways, security panels, and IoT hubs commonly run from 12V wall adapters. TPS54302DDCR generates a 3.3V rail for the host SoC, radios, and sensor arrays while delivering 3A of peak current. The wide 4.5V-28V input accommodates the 12V adapter tolerance and battery backup rails up to 28V. Its small SOT-23-6 package fits compact IoT PCB designs, and the 5ms soft start avoids brownouts when Wi-Fi radios burst on. The Eco-mode feature keeps no-load consumption low, assisting energy-star compliance. A companion TPS22997 load switch can isolate the radio from the host during reset.
Recommended
LED Lighting and Display Backlight Power
TPS54302DDCR can supply the logic and control power, not the LED string directly, in LED lighting and display systems. It steps down a 24V lighting bus to 3.3V or 5V for the LED driver controller, MCU, and communication circuits. Its 28V input rating safely handles 24V lighting rails. Constant-frequency operation gives predictable EMI behavior when placed near LED drivers, and the small footprint eases placement on space-constrained lighting PCBs. The 3A output also supports fan and thermal-management loads. Use a TPS22997 load switch for standby power gating in smart lighting nodes.
Recommended
Recommended Products Summary
Engineering reference data for TPS54302DDCR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS54202DDCR | TPS54308DDCR | TPS563201DDCR | ET8133 | RT6215B |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | ETEK | Richtek |
| Package | SOT-23-6 Thin (TSOT-23-6) | SOT-23-6 Thin (TSOT-23-6) | SOT-23-6 Thin (TSOT-23-6) | SOT-23-6 Thin (TSOT-23-6) | SOT-23-6 Thin (TSOT-23-6) | SOT-23-6 Thin (TSOT-23-6) |
| Input Voltage Range | 4.5 V - 28 V | 4.5 V - 28 V | 4.5 V - 28 V | 4.5 V - 17 V | [DATA_NEEDED] | 4.5 V - 18 V |
| Output Current | 3 A | 2 A | 3 A | 3 A | [DATA_NEEDED] | 3 A |
| Output Reference Voltage | 0.596 V | 0.596 V | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Integrated Soft Start | 5 ms | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Temperature Range | -40Β°C to +85Β°C | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| EMI / Eco-mode Features | EMI-Friendly, Advanced Eco-mode | Advanced Eco-mode | Eco-mode (600kHz) | Eco-mode (580kHz) | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Higher output current than the same-family TPS54202DDCR (vs TPS54202DDCR)
- Wider 28V input capability versus TPS563201DDCR (vs TPS563201DDCR)
- Complete TI qualification ecosystem versus cross-brand ET8133 (vs ET8133)
Design Notes
For continuous 3A operation at high VIN-VOUT differential, power dissipation can exceed 1W in the SOT-23-6 package. Use generous PCB copper area and thermal vias to the GND plane, while keeping the SW node pad area small for EMI control. For 24V to 3.3V conversion, efficiency may fall below 80%, so check junction temperature and derate if ambient exceeds 60Β°C.
Place 10uF X5R input capacitors close to VIN and GND, and the output capacitor close to the inductor output node. Keep the FB resistor divider and FB trace away from the SW node and inductor to avoid noise coupling. Use a solid ground connection and keep the BOOT capacitor within 2mm of the BOOT and SW pins. A short, wide SW trace reduces parasitic inductance and EMI.
Do not exceed the 28V absolute maximum rating on VIN; for 24V industrial buses with transients, add input TVS or an input filter. Choose an inductor with saturation current above 3A plus ripple current. The internal compensation is optimized for a specific output capacitance range, so follow the datasheet's recommended L-C values to avoid loop instability. Connect EN to VIN or a control signal; do not leave it floating.
Compliance Information
RoHS compliant per distributor and PartGenie listing. REACH status not explicitly provided in verified web data. No AEC-Q100 qualification shown for this standard orderable variant.
