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UCC33420QRAQRQ1

ULTRA-SMALL, 1.5W , 5.0V , 3KVRM

Part Number: UCC33420QRAQRQ1

Manufacturer: Texas Instruments

Category: DC DC Switching Controllers

Package: VSON-12

Datasheet:: UCC33420QRAQRQ1.pdf

Description: ULTRA-SMALL, 1.5W , 5.0V , 3KVRM

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

UCC33420QRAQRQ1 Automotive 4.5V to 5.5V, 1.5W, 5.0V, 3kVRMS Isolated DC/DC Module with Integrated Transformer

A comprehensive technical overview of the UCC33420QRAQRQ1, an AEC-Q100 qualified isolated DC/DC power module from Texas Instruments featuring integrated transformer technology, 1.5W maximum isolated output power, 4.5V to 5.5V input voltage range, selectable 5.0V/5.5V regulated output, 3kVRMS isolation rating, and a 12-pin VSON-FCRLF package. Covers device function, core features, electrical specifications, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 12-VSON-FCRLF (4.00mm × 5.00mm) 4.5V to 5.5V

Device Classification Isolated DC/DC Power Module

Part Number: UCC33420QRAQRQ1

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +125°C

PRODUCT OVERVIEW

What Is the UCC33420QRAQRQ1?

UCC33420QRAQRQ1 is an automotive qualified isolated DC/DC power module from Texas Instruments with integrated transformer technology designed to provide 1.5W of isolated output power. It supports an input voltage operation range of 4.5V to 5.5V and regulates a 5.0V output voltage with a selectable headroom of 5.5V.[reference:0]

The device features a proprietary transformer architecture that achieves a 3kVRMS isolation rating while simultaneously supporting low EMI and excellent load regulation. The UCC33420QRAQRQ1 integrates protection features for increased system robustness, including an enable pin with fault reporting mechanism, short circuit protection, and thermal shutdown.[reference:1]

The UCC33420QRAQRQ1 is AEC-Q100 qualified with device temperature grade 1: –40°C to +125°C ambient operating temperature and is functional safety-capable with documentation available to aid functional safety system design. It comes in a miniaturized, low-profile VSON (4.00mm × 5.00mm) package with 1.00mm height and greater than 4.1mm clearance and creepage. The device is RoHS compliant and in active production.[reference:2]

Integrated Transformer Technology 1.5W maximum isolated output power with 3kVRMS isolation rating, 6.5kVPK surge capability, and 1159VPK working voltage.[reference:3]

Wide Input & Selectable Output 4.5V to 5.5V input voltage range with selectable 5.0V or 5.5V regulated output voltage and 300mA available load current at 5.0V.[reference:4]

AEC-Q100 Qualified Device temperature grade 1: –40°C to +125°C ambient operating temperature with adaptive spread spectrum modulation (SSM) and CISPR-25 Class 5 emission compliance.[reference:5]

DEVICE HIGHLIGHTS

Key Features and Benefits of UCC33420QRAQRQ1

AEC-Q100 Qualified for Automotive

Device temperature grade 1: –40°C to +125°C ambient operating temperature, functional safety-capable with documentation available to aid functional safety system design.[reference:6]

Robust Isolation Barrier

3kVRMS isolation rating, 6.5kVPK surge capability, 1159VPK working voltage, and 200V/ns common mode transient immunity for reliable isolated operation.[reference:7]

Integrated Transformer Technology

Power dense isolated DC/DC module with integrated transformer technology, eliminating the need for external transformers and simplifying isolated power supply design.[reference:8]

Adaptive Spread Spectrum Modulation

Adaptive spread spectrum modulation (SSM) meets CISPR-25 Class 5 emission standards, with strong magnetic fields immunity for automotive and industrial environments.[reference:9]

Selectable Output Voltage

Selectable 5.0V or 5.5V regulated output voltage with 0.5% typical load regulation and 4mV/V typical line regulation.[reference:10]

Comprehensive Protection Features

Overload and short circuit protection, thermal shutdown, low inrush current soft-start, and enable pin with fault reporting mechanism.[reference:11]

REFERENCE DATA

Technical Specifications for UCC33420QRAQRQ1

Part Number	UCC33420QRAQRQ1	Manufacturer	Texas Instruments
Device Type	Isolated DC/DC Power Module	Topology	Isolated DC/DC Module with Integrated Transformer
Input Voltage Range (V_INP)	4.5V to 5.5V	Output Voltage Range (V_CC)	5.0V / 5.5V (Selectable)
Maximum Output Power	1.5W	Output Current (5.0V)	300mA
Load Regulation (Typical)	0.5%	Line Regulation (Typical)	4mV/V
Isolation Rating	3kVRMS	Surge Capability	6.5kVPK
Working Voltage	1159VPK	Common Mode Transient Immunity	200V/ns
Switching Frequency	76MHz (Typical)	Spread Spectrum Modulation	Adaptive (SSM)
V_INP UVLO Rising Threshold	2.8V (Min), 2.9V (Typ)	V_INP UVLO Falling Threshold	2.6V (Min), 2.7V (Typ)
V_INP OVLO Rising Threshold	5.77V (Min), 5.9V (Typ)	V_INP OVLO Falling Threshold	5.55V (Min), 5.72V (Typ)
Thermal Shutdown Rising	150°C (Min), 165°C (Typ)	Thermal Shutdown Falling	130°C (Typ)
EN/FLT Enable Rising Threshold	2.1V (Typ)	EN/FLT Enable Falling Threshold	0.8V (Typ)
Package / Case	VSON-FCRLF (RAQ) 12	Package Body Size	4.00mm × 5.00mm
Package Height	1.00mm	Pin Count	12
Mounting Type	Surface Mount	Operating Temperature	-40°C to +125°C (Ambient)
AEC-Q100 Qualification	Yes – Grade 1	Functional Safety	Capable (Documentation Available)
RoHS	Yes	REACH Status	Compliant
MSL Level / Peak Reflow	Level-3-260C-168 HR	ECCN	EAR99
Product Status	Active	Packaging	Tape & Reel (3,000 per Reel)

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for UCC33420QRAQRQ1

Output Voltage & Mode Configuration

The UCC33420QRAQRQ1 offers flexible output configuration:

Output Voltage Selection (SEL Pin): Connect SEL to VCC for 5.0V output, or connect SEL to GNDS for 5.5V output. To change output mode selection, toggle the EN/FLT pin or power cycle VINP.
Enable and Fault Reporting (EN/FLT Pin): Multi-function enable input and fault output pin. Connect to microcontroller through an 18kΩ or larger resistor. When a fault occurs, the pin is pulled low for 200µs.[reference:12]
Input Supply: 4.5V to 5.5V input voltage range with UVLO and OVLO protection for robust operation.
Output Current: 300mA available load current at 5.0V output, 1.5W maximum isolated output power.
Soft-Start: Low inrush current soft-start for controlled power-up.

PCB and System-Level Guidance

Isolated DC/DC module performance depends on layout and component selection:

Input Capacitors: Place 0402 and 0805 ceramic capacitors between VINP and GNDP pins for input bypass. A 15nF input capacitor (C_IN1) is recommended for optimal performance.
Output Capacitors: Place 0402 and 0805 ceramic capacitors between VCC and GNDS pins for isolated output supply. A 22µF output capacitor (C_OUT2) is recommended for optimal performance.
Clearance and Creepage: The package provides greater than 4.1mm clearance and creepage for the isolated barrier.
EMI Compliance: Meets CISPR-25 Class 5 emission standards with adaptive spread spectrum modulation (SSM). Refer to the EMI application note (SDAA192) for layout and filter recommendations.[reference:13]
Thermal Management: The VSON package provides excellent thermal performance. Ensure adequate copper area for heat dissipation.
Verify the recommended PCB footprint from the official datasheet prior to production.

12-LEAD VSON-FCRLF (4.00mm × 5.00mm)

Pin Configuration Reference for UCC33420QRAQRQ1

UCC33420

VSON TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The VSON-FCRLF package has 12 pins with a 4.00mm × 5.00mm body size, 1.00mm height, and greater than 4.1mm clearance and creepage for the isolated barrier.

1 EN/FLT Multi-Function Enable Input and Fault Output - Connect to Microcontroller through 18kΩ or Larger Resistor

2 V_INP Primary Side Input Supply Voltage - 4.5V to 5.5V

3 GNDP Primary Side Ground

4 GNDP Primary Side Ground

5 GNDP Primary Side Ground

6 GNDP Primary Side Ground

7 SEL VCC Selection Pin - Connect to VCC for 5.0V Output, Connect to GNDS for 5.5V Output

8 VCC Secondary Side Regulated Output Voltage - 5.0V or 5.5V Selectable

9 GNDS Secondary Side Ground

10 GNDS Secondary Side Ground

11 GNDS Secondary Side Ground

12 GNDS Secondary Side Ground

APPLICATION AREAS

Typical Applications for UCC33420QRAQRQ1

Battery-Management Systems (BMS)

AEC-Q100 qualified isolated DC/DC module providing reliable isolated bias power for battery management systems in HEV/EV applications.

HEV/EV OBC and DC/DC Converter

Provides isolated bias power for onboard chargers (OBC) and DC/DC converters in hybrid and electric vehicles.

Isolated Bias for Isolated Voltage and Current Sensors

Supplies isolated bias power for isolated voltage and current sensors in automotive and industrial systems.

Isolated Bias for Digital Isolators

Provides isolated power for digital isolators, ensuring reliable signal isolation in mixed-voltage systems.

Isolated Bias for RS-485, RS-422 and CAN Transceivers

Supplies isolated bias power for isolated communication transceivers, enabling robust data transmission in noisy environments.

HEV/EV Traction Inverter

Provides isolated bias power for gate drivers and control circuits in traction inverter applications.

REPLACEMENT GUIDANCE

Selecting an Alternative for UCC33420QRAQRQ1

A replacement for the UCC33420QRAQRQ1 should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official Texas Instruments product pages and datasheets.

Type: Isolated DC/DC Power Module

Input voltage: 4.5V–5.5V

Output voltage: 5.0V / 5.5V (Selectable)

Maximum output power: 1.5W

Isolation rating: 3kVRMS

Package: 12-VSON-FCRLF

Temperature range: –40°C to 125°C (AEC-Q100 Grade 1)

Integrated transformer technology

Pin-to-pin and functionally compatible alternatives (same family, different package or grade):

Part Number	Package	Temperature Grade	Packaging
UCC33420QRAQRQ1	12-VSON-FCRLF	Grade 1 (-40°C to 125°C)	Tape & Reel

Functionally similar alternatives (different package or features):

Part Number	Output Power	Input Voltage	Package	Key Difference
UCC33410-Q1	1.0W	4.5V–5.5V	VSON-12	Lower Output Power, Different Output Voltage
UCC33421-Q1	1.5W	4.5V–5.5V	VSON-12	Reinforced Isolation

All alternative part numbers listed above are documented in the official Texas Instruments product pages and datasheets. The UCC33420QRAQRQ1 is the automotive-grade (AEC-Q100 Grade 1) version in a 12-pin VSON-FCRLF package with tape-and-reel packaging (3,000 units per reel). For the non-automotive version in the same package, consider UCC33420RAQRQ1. For different feature sets or output configurations, consider UCC33410-Q1 or UCC33421-Q1. Select based on qualification, package, and application requirements.[reference:14]

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MANUFACTURER INFORMATION

Texas Instruments

The UCC33420-Q1 (UCC33420QRAQRQ1) belongs to the UCC33420-Q1 family of automotive isolated DC/DC power modules from Texas Instruments. The device features integrated transformer technology, providing 1.5W of isolated output power with a 3kVRMS isolation rating. The UCC33420-Q1 supports a 4.5V to 5.5V input voltage range and regulates a selectable 5.0V or 5.5V output voltage with 300mA available load current at 5.0V. The device is AEC-Q100 qualified with device temperature grade 1: –40°C to +125°C ambient operating temperature, functional safety-capable, and meets CISPR-25 Class 5 emission standards with adaptive spread spectrum modulation (SSM). The UCC33420-Q1 is designed for battery-management systems (BMS), HEV/EV OBC and DC/DC converters, isolated bias for isolated voltage and current sensors, digital isolators, and RS-485/RS-422/CAN transceivers.[reference:15]

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: UCC33420QRAQRQ1

Manufacturer: Texas Instruments

Package: VSON-12

Series: UCC33420-Q1

Package/Case: VSON-12

Packaging: Tape & Reel (TR)

Product Status: Active

Output Type: -

Function: -

Output Configuration: -

Topology: -

Number of Outputs: 1

Output Phases: -

Voltage - Supply (Vcc/Vdd): 4.5V to 5.5V

Frequency - Switching: -

Duty Cycle (Max): -

Synchronous Rectifier: -

Clock Sync: -

Serial Interfaces: -

Control Features: -

Operating Temperature: -40°C ~ 125°C

Grade: Automotive

Qualification: AEC-Q100

Mounting Type: Surface Mount

Supplier Device Package: VSON-12

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Part Number: UCC33420QRAQRQ1

Manufacturer: Texas Instruments

Package: VSON-12

Category: DC DC Switching Controllers

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