1 Features

• High-density DC/DC module with optimized

integrated transformer technology

• Input voltage range: 4.5 V to 5.5 V

• Output voltages (selectable): 5.4 V, 5.0 V, 3.7 V,

3.3 V

• Output power: 500 mW

• Peak efficiency: 60%

• Line regulation (typical): 1%

• Load regulation (typical): 1.5%

• Meets CISPR32 Class B EMI limits without ferrite

beads on a 2-layer PCB

• Spread spectrum modulation (SSM)

• Robust isolation barrier:

– Isolation rating: 3 kVRMS

– Surge capability: 6.5 kVPK

– Working voltage: 850 VRMS

– CMTI (typical): ±100 V/ns

• Short circuit recovery

• Thermal shutdown

• 16-pin wide-body SOIC package with > 8-mm

creepage and clearance

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

• Safety-related certifications:

– 5657-VPK basic isolation per DIN V VDE V

0884-11:2017- 01

– 3000-VRMS isolation for 1 minute per UL 1577

– UL certification per IEC 60950-1, IEC 62368- 1

and IEC 60601-1 end equipment standards

– CQC approval per GB4943.1-2011

2 Applications

• PLC analog input & output modules

• Grid protection relays & smart breakers

• Medical patient monitors

• Isolated bias for digital isolators

• Isolated bias for RS-485/RS-422/CAN transceivers

• Isolated bias for voltage and current sensors

3 Description

UCC12040 is a DC/DC power module with 3-kVRMS

basic isolation rating designed to provide efficient,

isolated power to isolated circuits that require a

bias supply with a well-regulated output voltage. The

device integrates a transformer and DC/DC controller

with a proprietary architecture to provide 500 mW

(typical) of isolated power with low EMI.

The UCC12040 integrates protection features for

increased system robustness. The device also has an

enable pin, synchronization capability, and regulated

5-V or 3.3-V output options with headroom. The

UCC12040 is a low-profile, miniaturized solution

offered in a wide-body SOIC package with 2.65-mm

height.