TPS54302QDDCRQ1 - 28V 3A Sync Buck AEC-Q100 | TI
MPN: TPS54302QDDCRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.75 | $17.50 |
| 100 | $1.45 | $145.00 |
| 500 | $1.25 | $625.00 |
| 1,000 | $1.05 | $1,050.00 |
Drop-in alternatives for TPS54302QDDCRQ1 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:
TPS54302DDCR
β Drop-Inβ In Stock
$0.24 / Unit
View Datasheet βTPS56339DDCR
β Drop-Inπ Reference alternative (not in catalog)
ET8133
β Drop-Inπ Reference alternative (not in catalog)
TPS54302QDDCRQ1 Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Step-Down (Buck) |
| Input Voltage Range | 4.5 V to 28 V |
| Output Voltage Range | 0.596 V adjustable |
| Maximum Output Current | 3 A |
| Switching Frequency | 400 kHz fixed |
| High-Side MOSFET Rds(on) | 85 mOhm |
| Low-Side MOSFET Rds(on) | 40 mOhm |
| Quiescent Current | 45 uA |
| Shutdown Current | 2 uA |
| Internal Soft Start | 5 ms |
| Control Mode | Peak current-mode |
| Light Load Mode | Eco-mode pulse skip |
| EMI Features | Frequency spread spectrum, EMI-friendly layout |
| Package | SOT-23-6 Thin, TSOT-23-6 (DDC) |
| Mounting Type | Surface Mount |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| Qualification | AEC-Q100 automotive qualified |
| Protection Features | Overcurrent |
TPS54302QDDCRQ1 Pin Configuration
| Pin 1 | BOOT β Bootstrap capacitor connection for high-side gate drive |
| Pin 2 | GND β Ground reference, thermal pad connection |
| Pin 3 | SW β Switching node, connect to power inductor |
| Pin 4 | VIN β Input supply, 4.5V to 28V |
| Pin 5 | EN β Enable pin, internal pull-up (verify per datasheet) |
| Pin 6 | FB/VSENSE β Feedback input for output voltage setting (verify pin function per datasheet) |
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
TPS54302QDDCRQ1 is suitable for 6 applications: Automotive Infotainment and Cluster Point-of-Load, ADAS Sensor Module Power, 24V Industrial Automation Rails, Automotive Body Electronics and Lighting, Telecom and Networking Sub-Rails, Battery-Powered Portable Instruments.
Automotive Infotainment and Cluster Point-of-Load
In automotive infotainment and instrument cluster boards, TPS54302QDDCRQ1 converts 12V battery-derived rails down to 5V or 3.3V point-of-load supplies for SoCs, displays, and audio amplifiers. Its AEC-Q100 qualification meets automotive temperature and reliability requirements, while the 4.5V to 28V input range tolerates cold crank and transients. Spread spectrum switching at 400 kHz lowers emissions peaks that could couple into AM/FM tuner inputs. The integrated 5 ms soft start prevents inrush-induced voltage dips during startup, and Eco-mode keeps quiescent consumption low when the system sleeps.
Recommended
ADAS Sensor Module Power
ADAS camera, radar, and ultrasonic modules require compact, low-EMI step-down conversion from 9V to 16V supplies. TPS54302QDDCRQ1 fits with its small 6-pin SOT-23 footprint, ideal for dense sensor PCBs, and its 3A capability covers image sensor, SerDes, and local processor rails. The EMI-friendly design and frequency spread spectrum help pass EMC tests on modules placed near antennas. Peak current-mode control with internal compensation provides stable, fast transient response when sensors switch power modes, and 2 uA shutdown current suits modules that must power down between detection cycles.
Recommended
24V Industrial Automation Rails
Industrial PLC I/O modules, motor control boards, and sensors typically run from a 24V bus. The 28V maximum input of TPS54302QDDCRQ1 accepts regulated 24V rails directly, stepping down to 5V or 3.3V logic supplies in a single stage without a pre-regulator. Fixed 400 kHz switching permits small inductors, and the integrated MOSFETs remove diode losses for higher efficiency. The 45 uA quiescent current supports always-on condition-monitoring nodes, and the AEC-Q100 grade offers margin for demanding factory environments with wide temperature swings and vibration.
Recommended
Automotive Body Electronics and Lighting
Body control modules, LED headlamp drivers, and gateway ECUs need robust, small buck converters. TPS54302QDDCRQ1 provides regulated logic power with overcurrent protection, and its spread spectrum reduces interference with RF keyless-entry receivers. The 6-pin package enables placement close to microcontroller clusters, minimizing high-frequency loop area. Eco-mode pulse skipping maintains efficiency at standby loads drawn while the vehicle is parked, directly reducing quiescent battery drain, an important automotive requirement where modules remain powered continuously.
Recommended
Telecom and Networking Sub-Rails
Telecom cards and network equipment commonly distribute 12V or 24V intermediate rails. TPS54302QDDCRQ1 steps these down efficiently to 5V, 3.3V, or lower for PHYs, FPGAs I/O, and microcontrollers. The synchronous topology achieves high efficiency across load range, reducing thermal load in sealed enclosures. Internal compensation and 5 ms soft start simplify paralleling of housekeeping supplies during card bring-up, while compact SOT-23-6 placement next to load points reduces distribution losses and improves transient regulation for noise-sensitive high-speed links.
Recommended
Battery-Powered Portable Instruments
Handheld test equipment, portable diagnostic tools, and battery-backed data loggers benefit from the TPS54302QDDCRQ1 low quiescent and shutdown currents. Drawing only 45 uA in operation and 2 uA in shutdown, it preserves battery life in duty-cycled instruments. Its 3A capability also supports brief high-current loads such as RF transmit bursts or motor actuations. Eco-mode pulse skipping keeps light-load efficiency high, extending run time between charges, while the small package conserves board space in handheld enclosures.
Recommended
Recommended Products Summary
Engineering reference data for TPS54302QDDCRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS54302DDCR | TPS56339DDCR | ET8133 | TPS54331DR |
|---|---|---|---|---|---|
| Package | SOT-23-6 Thin (DDC) | SOT-23-6 Thin (DDC) - same | SOT-23-6 Thin (DDC) - same | SOT-23-6 Thin (DDC) - same | SOIC-8 - different footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | ETEK (Will Semiconductor) | Texas Instruments |
| Input Voltage Range | 4.5 V to 28 V | 4.5 V to 28 V | [DATA_NEEDED] | similar per ETEK - [DATA_NEEDED] | [DATA_NEEDED] |
| Output Current | 3 A | 3 A | 3 A | similar - [DATA_NEEDED] | 3 A |
| Switching Frequency | 400 kHz fixed | 400 kHz fixed | [DATA_NEEDED] | [DATA_NEEDED] | 560 kHz |
| Qualification | AEC-Q100 (Q1) | Commercial grade | Commercial grade | [DATA_NEEDED] | Commercial grade |
| Topology | Synchronous buck | Synchronous buck | Synchronous buck | Synchronous buck | Non-synchronous buck |
| Quiescent Current | 45 uA | 45 uA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| EMI Features | Spread spectrum, EMI-friendly layout | Spread spectrum, EMI-friendly | [DATA_NEEDED] | [DATA_NEEDED] | None specified |
Key Differentiators
- AEC-Q100 automotive qualification (vs TPS54302DDCR)
- Integrated synchronous MOSFETs with EMI spread spectrum (vs TPS54331DR)
- Ultra-low standby consumption (vs TPS56339DDCR)
Design Notes
Follow the TI TPS54302 datasheet EMI-friendly layout: place the input capacitor as close as possible to VIN and GND, keep the SW node copper area minimal, and route the feedback trace away from the switch node. A solid ground plane under the IC with multiple thermal vias improves heat spreading for the SOT-23-6 thermal pad at 3A loads.
At 3A continuous output with significant input-to-output voltage difference, power loss in the integrated 85/40 mOhm MOSFETs and switching losses concentrate in the small SOT-23-6 package. Estimate dissipation from datasheet efficiency curves and provide at least 2 oz copper with adequate thermal pad area; verify junction temperature stays within the AEC-Q100 qualified rating for the automotive ambient.
Use the internal frequency spread spectrum in automotive EMC-sensitive designs and verify conducted emissions at 400 kHz harmonics in the final layout. Keep inductor current ripple within datasheet recommendations; overly small inductance increases peak current and EMI, while oversized inductance degrades transient response.
Pin-compatible is not drop-in: buck converters sharing the SOT-23-6 outline may differ in feedback reference, soft start, and pin functions. When substituting (e.g., ET8133 or TPS56339), re-verify the output voltage divider, enable logic, and compensation behavior before production. Do not exceed 28V input; add TVS protection for automotive transients.
Compliance Information
AEC-Q100 qualification indicated by Q1 suffix per TI product page. RoHS/REACH status not explicitly stated in provided verified data - confirm on TI.com quality page.
