1 Features
• 1.5W maximum output power
• 4.5V to 5.5V input voltage operation range
• 5.0V, 5.5V regulated selectable output voltage
– 5.0V: 300mA available load current
• 0.5% typical load regulation
• 4mV/V typical line regulation
• Robust isolation barrier:
– Isolation rating: 3kVRMS
– Surge capability: 6.5kVPK
– Working voltage: 1159VPK
– 200V/ns common mode transient immunity
• Power dense isolated DC/DC module with
integrated transformer technology
• Adaptive spread spectrum modulation (SSM)
• Meets CISPR-25 Class 5 emission
• Strong magnetic fields immunity
• Overload and short circuit protection
• Thermal shutdown
• Low inrush current soft-start
• Enable pin with fault reporting mechanism
• Planned Safety-Related Certifications:
– DIN EN IEC 60747-17 (VDE 0884-17)
– UL 1577 / CSA component recognition program
– IEC 62368-1 and IEC 60601-1 certifications
• AEC-Q100 qualified with the following results:
– Device temperature Grade 1: –40°C to 125°C
ambient operating temperature
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• VSON-12 (4.00mm × 5.00mm) package

2 Applications
• Battery-Management Systems (BMS)
• HEV/EV OBC and DC/DC converter
• Isolated power for voltage and current sensors
• Isolated bias power for digital isolators
• Isolated bias power for RS-485, RS-422 and CAN

3 Description
UCC33420-Q1 is an automotive qualified DC/DC
power module with integrated transformer technology
designed to provide 1.5W of isolated output power.
It can support an input voltage operation range of
4.5V to 5.5V and regulate 5.0V output voltage with a
selectable headroom of 5.5V.
UCC33420-Q1 features a proprietary transformer
architecture that achieves a 3kVRMS isolation rating,
while simultaneously supporting low EMI and
excellent load regulation.
The UCC33420-Q1 integrates protection features for
increased system robustness such as enable pin with
fault reporting mechanism, short circuit protection and
thermal shutdown.
The UCC33420-Q1 comes in a miniaturized, lowprofile
VSON (4.00mm × 5.00mm) package with
1.00mm height and > 4.1mm clearance and
creepage.