UCC33420 - 1.5W Isolated DC/DC Module | Texas Instruments
MPN: UCC33420 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for UCC33420 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:
UCC33420RAQR
β Drop-Inπ Reference alternative (not in catalog)
UCC33420QRAQRQ1
β Drop-Inπ Reference alternative (not in catalog)
UCC33411-Q1
β Drop-Inπ Reference alternative (not in catalog)
UCC34141-Q1
β Drop-Inβ In Stock
$5.5 / Unit
View Datasheet βADuM5010
β Drop-Inπ Reference alternative (not in catalog)
UCC33420 Maximum Ratings & Electrical Characteristics
| Output Power | 1.5 W |
| Input Voltage Range | 4.5 V to 5.5 V |
| Output Voltage | 5.0 V or 5.5 V (selectable) |
| Output Current | 200 mA at 5.0 V |
| Isolation Rating | 3 kVRMS |
| Load Regulation | 0.5% typical |
| Line Regulation | 4 mV/V typical |
| Package | VSON-12 (4.00 mm Γ 5.00 mm) |
| Package Height | 1.00 mm |
| Clearance and Creepage | >4.1 mm |
| Enable Pin | Yes, with fault reporting |
| Short Circuit Protection | Yes |
| Thermal Shutdown | Yes |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| RoHS Status | Compliant |
UCC33420 Pin Configuration
| Pin 1 | VINP β Input power supply |
| Pin 2 | GNDP β Primary ground |
| Pin 3 | EN/FLT β Enable and fault reporting |
| Pin 4 | VOUT β Regulated output voltage |
| Pin 5 | GNDS β Secondary ground |
| Pin 6 | VSEL β Output voltage select |
| Pin 7 | NC β No connect |
| Pin 8 | NC β No connect |
| Pin 9 | NC β No connect |
| Pin 10 | NC β No connect |
| Pin 11 | NC β No connect |
| Pin 12 | NC β No connect |
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
UCC33420 is suitable for 6 applications: IGBT/SiC Gate Driver Power Supply, Industrial Fieldbus Transceiver Power, Isolated Sensor Interface, Automotive Isolated Power, Data Center Bias Supply, Medical Device Isolation.
IGBT/SiC Gate Driver Power Supply
The UCC33420 provides isolated 5V/5.5V bias for IGBT and SiC gate drivers. Its 3kVRMS isolation and low EMI ensure reliable switching in high-voltage power stages. The 1.5W output power is sufficient for driving multiple gate driver channels, and the selectable output voltage allows optimization for different gate drive requirements. The integrated transformer reduces board space and simplifies design compared to discrete solutions.
Recommended
Industrial Fieldbus Transceiver Power
The UCC33420 powers isolated fieldbus transceivers in industrial automation. Its 3kVRMS isolation breaks ground loops and protects against common-mode noise. The 5V output with 200mA current capability supports PROFIBUS, CAN, and RS-485 transceivers. The low-profile VSON package fits in space-constrained PLC and I/O modules, and the enable pin allows power sequencing for multi-rail systems.
Recommended
Isolated Sensor Interface
The UCC33420 provides isolated power for sensor interfaces in industrial and medical applications. Its low EMI and excellent load regulation ensure accurate sensor readings. The 5V output can power isolated ADCs, amplifiers, and digital isolators. The 3kVRMS isolation protects sensitive measurement circuits from high-voltage transients, and the small package enables compact sensor modules.
Recommended
Automotive Isolated Power
The UCC33420-Q1 variant is AEC-Q100 qualified for automotive applications. It provides isolated power for battery management systems, on-board chargers, and traction inverters. The 3kVRMS isolation meets automotive safety requirements, and the wide input range accommodates 5V rails in automotive electronics. The enable pin with fault reporting enhances system diagnostics.
Recommended
Data Center Bias Supply
The UCC33420 provides isolated bias rails for data center equipment, including servers and networking gear. Its 1.5W output power is ideal for powering isolated controllers, fans, and monitoring circuits. The low-profile VSON package fits in dense PCB layouts, and the low EMI helps meet EMC standards. The selectable 5V/5.5V output provides flexibility for different bias requirements.
Recommended
Medical Device Isolation
The UCC33420 provides isolated power for medical devices, ensuring patient safety through galvanic isolation. Its 3kVRMS isolation meets medical safety standards, and the low leakage current is suitable for patient-connected equipment. The 5V output powers isolated sensor interfaces and communication circuits. The small package enables compact medical devices, and the thermal shutdown protects against overheating.
Recommended
Recommended Products Summary
Engineering reference data for UCC33420 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UCC33420RAQR | UCC33420QRAQRQ1 | UCC33411-Q1 | UCC34141-Q1 | ADuM5010 |
|---|---|---|---|---|---|---|
| Package | VSON-12 | VSON-12 | VSON-12 | VSON-12 | VSON-12 | VSON-12 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Output Power | 1.5 W | 1.5 W | 1.5 W | 1.0 W | [DATA_NEEDED] | 0.5 W |
| Output Voltage | 5.0 V or 5.5 V | 5.0 V or 5.5 V | 5.0 V or 5.5 V | 3.3 V | [DATA_NEEDED] | 5.0 V |
| Isolation Rating | 3 kVRMS | 3 kVRMS | 3 kVRMS | 5 kVRMS | [DATA_NEEDED] | 2.5 kVRMS |
| Automotive Grade | No | No | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | No |
| Enable Pin | Yes | Yes | Yes | Yes | Yes | No |
| Price (1pc) | $4.85 | $4.85 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Integrated transformer technology (vs ADuM5010)
- Selectable output voltage (vs UCC33411-Q1)
- Automotive grade option (vs UCC33420RAQR)
Design Notes
For the UCC33420, maintain proper isolation barrier clearance and creepage on the PCB. The package has >4.1mm clearance and creepage, so ensure the PCB layout respects this distance between primary and secondary sides. Place input and output capacitors close to the pins to minimize noise and improve EMI performance.
The UCC33420 dissipates power internally, so ensure adequate thermal management. The VSON package has an exposed pad that should be soldered to a copper pour for heat sinking. For 1.5W output, the power dissipation is moderate, but in high ambient temperatures, consider additional thermal vias or a larger copper area.
Do not exceed the input voltage range of 4.5V to 5.5V. The EN/FLT pin is not 5V tolerant, so when connecting to a 3.3V logic, ensure it is not driven above 3.6V. Also, the output voltage selection pin (VSEL) must be set correctly to avoid unintended output voltage.
Compliance Information
RoHS compliant per TI product page. Automotive grade variant UCC33420QRAQRQ1 is AEC-Q100 qualified.
