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: 5kVRMS

– Surge capability: 10.4kVPK

– Working voltage: 1700VPK

– ± 8KV IEC 61000-4-2 contact discharge

protection across isolation barrier

– 250V/ns common mode transient immunity

• Power dense isolated DC/DC module with

integrated transformer technology

• Adaptive spread spectrum modulation (SSM)

• Meets CISPR-32 Class B emission

• Strong magnetic fields immunity

• Overload and short circuit protection

• Thermal shutdown

• Low inrush current soft-start

• Enable pin with fault reporting mechanism

• Extended temperature range: –40°C to 125°C

• SSOP-16 (5.85mm × 7.50mm) package

• >8.2mm clearance and creepage

2 Applications

• ESS - Battery Management system

• Smart Meter

• Solar Inverter

• Bias power for isolated measurements

• Bias power for isolated signal chain

3 Description

The UCC33421 is an industrial 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.

The UCC33421 features a proprietary transformer

architecture that achieves a 5kVRMS isolation rating,

while simultaneously supporting low EMI and

excellent load regulation.

The UCC33421 integrates protection features for

increased system robustness such as enable pin with

fault reporting mechanism, short circuit protection and

thermal shutdown.

The UCC33421 comes in a miniaturized, low-profile

SSOP (5.85mm × 7.50mm) package with 2.65mm

height and > 8.2mm clearance and creepage.