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UCC33421-Q1

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Automotive, 5V/5V, 1.5W 5kVrms isolated DC-DC power module with integrated transformer

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Data sheet

UCC33421-Q1

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Data sheet Order now

Product details

Rating Automotive Vin (max) (V) 5.5 Vin (min) (V) 4.5 Vout (max) (V) 5.7 Vout (min) (V) 4.85 Features 1.5W, Regulated, Reinforced isolation, Single output Device type Isolated modules Regulated outputs (#) 1 TI functional safety category Functional Safety-Capable Isolation rating Reinforced Operating temperature range (°C) -40 to 125
Rating Automotive Vin (max) (V) 5.5 Vin (min) (V) 4.5 Vout (max) (V) 5.7 Vout (min) (V) 4.85 Features 1.5W, Regulated, Reinforced isolation, Single output Device type Isolated modules Regulated outputs (#) 1 TI functional safety category Functional Safety-Capable Isolation rating Reinforced Operating temperature range (°C) -40 to 125
UNKNOWN (DHA) 16 See data sheet
  • 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
  • 2mV/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-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
  • Functional Safety-Capable
  • Planned Safety-related certifications:
    • Reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5kVRMS isolation for 1 minute per UL 1577 / CSA
  • AEC-Q100 qualified with the following results:
    • Device temperature Grade 1: –40°C to 125°C ambient operating temperature
  • SOIC-16 (5.85mm × 7.50mm) package
  • 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
  • 2mV/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-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
  • Functional Safety-Capable
  • Planned Safety-related certifications:
    • Reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5kVRMS isolation for 1 minute per UL 1577 / CSA
  • AEC-Q100 qualified with the following results:
    • Device temperature Grade 1: –40°C to 125°C ambient operating temperature
  • SOIC-16 (5.85mm × 7.50mm) package

UCC33421-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.

UCC33421-Q1 features a proprietary transformer architecture that achieves a 5kVRMS isolation rating, while simultaneously supporting low EMI and excellent load regulation.

The UCC33421-Q1 integrates protection features for increased system robustness such as enable pin with fault reporting mechanism, short circuit protection and thermal shutdown.

The UCC33421-Q1 comes in a miniaturized, low-profile solution SOIC (5.85mm × 7.50mm) package with 2.65mm height and > 8.2mm creepage and clearance

UCC33421-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.

UCC33421-Q1 features a proprietary transformer architecture that achieves a 5kVRMS isolation rating, while simultaneously supporting low EMI and excellent load regulation.

The UCC33421-Q1 integrates protection features for increased system robustness such as enable pin with fault reporting mechanism, short circuit protection and thermal shutdown.

The UCC33421-Q1 comes in a miniaturized, low-profile solution SOIC (5.85mm × 7.50mm) package with 2.65mm height and > 8.2mm creepage and clearance
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Technical documentation

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Type Title Date
* Data sheet UCC33421-Q1 Ultra-Small, 1.5W , 5.0V , 5kVRMS Isolation, Automotive DC/DC Module datasheet PDF | HTML 20 Oct 2023
EVM User's guide UCC33421EVM-092 Evaluation Module for Automotive and Industrial Applications User's Guide (Rev. C) PDF | HTML 04 Aug 2025
Application brief High Voltage Measurement in HEV/EV Application PDF | HTML 16 Jun 2025

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

UCC3342x and UCC3342x-Q1 SIMPLIS Model (Rev. B)

SLUM888B.ZIP (88 KB) - SIMPLIS Model
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Calculation tool

UCC3342X-CALC — Soft-start rise time and steady-state burst-on duration calculator

This calculator is used to calculate the soft-start rise time and steady state burst-on duration for UCC3342x devices with different load and output capacitor configurations
Supported products & hardware

Supported products & hardware

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Isolated power modules (integrated transformer)
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Schematic: PDF
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Design guide: PDF
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