UCC2805DTRG4 Tech Specifications
Texas Instruments - UCC2805DTRG4 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - UCC2805DTRG4

Product Attribute	Attribute Value
Part Number	UCC2805DTRG4
Package	SOIC-8
Description	SOIC-8
Stock Condition	Get 12470 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	Texas Instruments
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Parts Introduction

Manufacturer Part Number

UCC2805DTRG4

Manufacturer

Texas Instruments

Introduction

The UCC2805DTRG4 is a high-performance, low-power PWM controller designed for a wide range of power supply applications. It features advanced control mechanisms, robust protection features, and high efficiency to deliver reliable and consistent power management capabilities.

Product Features and Performance

Wide input voltage range from -0.3V to 6.3V

Supply voltage range of 3.6V to 11V

Low supply current of 500 μA

Wide operating temperature range of -40°C to 125°C

Surface mount, 8-SOIC package

Capable of driving high-side and low-side N-channel MOSFETs

Product Advantages

Excellent power conversion efficiency

Robust protection features, including overcurrent, overvoltage, and thermal shutdown

Flexible control and configuration options

Compact and space-saving design

Key Reasons to Choose

High performance and reliability in a wide range of power supply applications

Optimized for efficient and stable power management

Comprehensive protection features ensure safe and reliable operation

Small form factor and easy integration into various system designs

Quality and Safety Features

Designed and manufactured to high-quality standards

Robust protection mechanisms for safe and reliable operation

RoHS-compliant and environmentally friendly

Compatibility

The UCC2805DTRG4 is compatible with a variety of power supply and control applications, including:

Switching power supplies

DC-DC converters

Voltage regulators

Industrial and consumer electronics

Application Areas

Power supplies for industrial equipment

Power management in consumer electronics

Automotive and transportation applications

Telecommunications and networking equipment

Product Lifecycle

The UCC2805DTRG4 has been discontinued by the manufacturer, Texas Instruments. However, there are alternative products available that may offer similar or improved features and performance. Customers are advised to contact our website's sales team for more information on comparable products and availability.

Frequently Asked Questions(FAQ)

How does the UCC2805DTRG4's input voltage range of -0.3V to 6.3V influence its use in isolated power supply topologies, and what are the implications for startup behavior and fault protection?: The UCC2805DTRG4 supports a negative input voltage as low as -0.3V, which enables robust operation in bridgeless PFC or active clamp forward converters where the controller must tolerate voltage swings below ground during transient events. This capability allows designers to implement more efficient rectification schemes without requiring additional level-shifting circuitry at the input. However, the absolute minimum of -0.3V means care must be taken with layout parasitics and decoupling to avoid false triggering. The wide input range also simplifies compatibility with universal AC-DC front-end designs that exhibit significant ripple on the DC bus during startup.

What is the significance of the UCC2805DTRG4 drawing only 500 µA of supply current, and how does this affect thermal performance and system efficiency in low-power offline applications?: At just 500 µA, the UCC2805DTRG4 contributes minimal quiescent power loss, which is critical in energy-efficient offline power supplies such as adapters or standby power units. For example, in a 60W adapter operating at 90% efficiency, the controller’s own loss due to quiescent current would be approximately 0.03W—negligible compared to total losses but still relevant when targeting compliance with ErP Lot 6 or CoC Tier 2 standards. This low Iq also reduces self-heating in compact enclosures, allowing sustained operation up to 125°C ambient without derating.

How does the UCC2805DTRG4 compare to the UCC2805DTR in terms of packaging and reliability, and why might a designer choose the G4 suffix version?: The UCC2805DTRG4 is functionally identical to the UCC2805DTR but features improved manufacturing process control and enhanced quality screening under Texas Instruments’ Green Package initiative. While both share the same 8-SOIC footprint and electrical specifications, the G4 variant typically undergoes stricter moisture sensitivity handling and has better long-term solder joint reliability under thermal cycling. Designers selecting the G4 version often do so for high-volume production where traceability and consistent assembly yield are prioritized over minor cost differences.

In what scenarios would the UCC2805DTRG4 be preferred over the UCC2813DTR-5 despite both being PWM controllers from TI?: Although both are fixed-frequency PWM controllers, the UCC2805DTRG4 supports a lower minimum duty cycle and better line regulation under light loads, making it more suitable for flyback or resonant topologies requiring precise control across wide input variations. Conversely, the UCC2813DTR-5 offers integrated soft-start and fixed-frequency operation optimized for quasi-resonant flybacks. If your design requires strict output voltage accuracy under varying line conditions—such as in telecom PSUs—the UCC2805DTRG4 provides superior dynamic response due to its analog compensation architecture.

What are the key limitations when using the UCC2805DTRG4 in synchronous rectification applications, and how should gate drive timing be managed?: The UCC2805DTRG4 lacks dedicated synchronous rectifier (SR) drivers, so external MOSFETs must be controlled via discrete logic or an auxiliary driver IC. This introduces additional propagation delay and requires careful dead-time programming to prevent shoot-through. For instance, in a 500kHz buck converter using SiC MOSFETs with sub-nanosecond turn-on times, even 50ns of misalignment can cause significant conduction losses. Therefore, designers must implement level-shifted SR control using separate drivers like UCC27517 or opt for asymmetric half-bridge configurations with built-in dead-time generation.

How does the operating temperature range of -40°C to 125°C impact component selection for automotive or industrial environments using the UCC2805DTRG4?: The extended junction-to-ambient temperature rating ensures reliable operation in harsh environments, including engine compartments or factory automation equipment. However, the actual case temperature depends on PCB copper area and airflow. In a typical 4-layer board with 2oz copper and natural convection, the UCC2805DTRG4 may reach 110°C at 125°C ambient due to power dissipation. Thus, thermal simulation using tools like TI’s WEBENCH or Ansys Icepak is essential to validate long-term reliability, especially when driving high-current FETs from the 8-pin SOIC package.

Can the UCC2805DTRG4 directly drive high-side MOSFETs in a totem-pole PFC stage, and what precautions are necessary?: Yes, but only if the bootstrap capacitor and diode are properly sized to maintain gate-source voltage above threshold during switching transitions. Since the device operates from 3.6V to 11V, a bootstrap circuit with a 10µF ceramic capacitor and Schottky diode is recommended to sustain Vgs > 10V for most Si MOSFETs. Failure to decouple the gate loop effectively can lead to voltage droop during high-duty cycles, causing instability or reduced efficiency. Additionally, ensure the high-side FET has low Miller plateau charge to minimize cross-conduction risk.

What role does the Moisture Sensitivity Level 1 (MSL1) status play in the handling and storage of UCC2805DTRG4 devices?: MSL1 indicates that the UCC2805DTRG4 can withstand unlimited exposure to ambient humidity without requiring dry packing before reflow soldering. This simplifies inventory management and assembly scheduling in high-turnover production lines. However, standard IPC Class 3 handling practices still apply—avoid prolonged exposure to open air after baking unless necessary, and store in original sealed packaging until use to prevent electrostatic discharge (ESD) damage during transport.

How does the UCC2805DTRG4 support multi-output power supplies, and what trade-offs exist in regulator configuration?: As a single-channel PWM controller, the UCC2805DTRG4 manages one switching node, so multi-output designs require either multiple controllers or post-regulation stages. For example, in a 12V/5V/3.3V server PSU, you could use two UCC2805DTRG4 units with interleaved phases or pair it with linear regulators for secondary rails. However, this increases BOM count and board space. Alternatively, consider using a primary-secondary transformer winding strategy with voltage clamping on non-primary sides, though this complicates feedback isolation and transient response tuning.

Is the UCC2805DTRG4 suitable for digitally programmable power supplies, and what interface options exist?: No native digital interface is provided; the UCC2805DTRG4 uses analog feedback and compensation networks. To enable digital programmability—such as adjusting frequency or enabling/disabling outputs—you must add an external microcontroller via GPIOs monitoring the FB pin or using a digital potentiometer in the feedback divider. For instance, replacing a 10kΩ resistor with a MCP41xxx series digital pot allows real-time voltage adjustment, but adds latency and potential noise susceptibility. This approach works best in test benches rather than mass-market products.

How does the UCC2805DTRG4 handle overcurrent protection, and what external components are needed for accurate sensing?: The device does not include internal current sensing; instead, it relies on external shunt resistors or sense windings on the transformer. A common method is to monitor the drain-source voltage during the OFF time using a small RC filter (e.g., 1kΩ + 100pF) connected to the SW pin. When the voltage exceeds a preset threshold, the controller disables switching. For precision, use a differential amplifier with <1% tolerance resistors and place the sense path close to the switch node to minimize ringing-induced false triggers.

What are the implications of RoHS3 compliance for the UCC2805DTRG4 in global markets, particularly regarding halogen and antimony content?: RoHS3 compliance confirms the UCC2805DTRG4 contains no restricted substances above threshold limits, including halogen-free epoxy mold compound and antimony oxide substitutes. This ensures market access in regions like China, Japan, and Europe without requiring exemption documentation. However, some OEMs impose stricter internal standards—such as <1000ppm bromine in printed wiring boards—so verify full assembly-level compliance, as the controller itself is inert but interacts with other materials in the system.

How does the ISL6843IBZ-T substitute compare to the UCC2805DTRG4 in terms of topology flexibility and efficiency?: The ISL6843IBZ-T is a quasi-resonant controller optimized for flyback converters, offering valley switching to reduce switching losses. In contrast, the UCC2805DTRG4 operates in fixed-frequency PWM mode, providing simpler EMI filtering and better audio susceptibility control. While the ISL6843 can achieve higher efficiency at light loads (up to 92% vs. ~88%), the UCC2805DTRG4 excels in applications requiring predictable timing and strong line regulation, such as industrial motor drives or LED lighting where flicker must be minimized.

What layout considerations are critical when routing signals near the UCC2805DTRG4 to avoid instability or radiated emissions?: Keep the COMP, SS, and FB pins short and routed away from the SW node to prevent capacitive coupling that distorts feedback. Place bulk capacitors within 5mm of the VCC pin to suppress supply rail transients. Additionally, use a star ground for analog return paths and avoid splitting the ground plane under the IC. In switching frequencies above 200kHz, a ground guard ring around the SW pad helps contain electric fields and reduce conducted emissions, which is vital for passing CISPR 22 Class B requirements.

Can the UCC2805DTRG4 be used in battery-powered systems, and what modifications are required?: Yes, but only if the input voltage remains within 3.6V–11V and total system current draw stays below 50mA average. In low-power IoT edge nodes powered by Li-ion cells (3–4.2V), the UCC2805DTRG4 can regulate a boost or buck-boost output efficiently. However, since it lacks shutdown pin functionality, you must rely on external load switches or MOSFETs to cut power completely. Also, consider adding UVLO hysteresis to prevent brownout resets during battery sag events.

What is the typical start-up delay of the UCC2805DTRG4, and how does it affect power sequencing in multi-rail systems?: The device starts oscillating approximately 200–500µs after VCC exceeds 3.6V, depending on the soft-start capacitor value. During this period, output voltages rise slowly to limit inrush current. In multi-rail designs, this staggered start can help prioritize critical rails, but requires careful coordination with downstream LDOs or DC-DC converters. For example, if a 1.2V processor rail powers up after a 5V rail, ensure the latter remains stable long enough to meet the former’s hold-up time requirement.

How does the base product number UCC2805 relate to derivative parts like the DTRG4, and what risks arise from substituting variants?: All UCC2805 derivatives share core architecture and pinout, but minor variations exist in packaging finish, lead plating, or internal trimming. Substituting UCC2805DTRG4 for UCC2805DTR is generally safe due to shared supplier device package and RoHS status, but always verify thermal resistance (θJA) and solderability per J-STD-001. Using mismatched variants in safety-certified systems may void UL or IEC approvals, especially if the replacement lacks equivalent insulation coordination.

What testing methodology is recommended to validate the UCC2805DTRG4 in a prototype phase before committing to production?: Begin with a bench test using an oscilloscope to measure switching waveform integrity, loop stability via Bode plot analysis, and efficiency at full and light loads. Inject line transients (±20%) and load steps (±50%) to assess transient response. Use a thermal camera to map hotspots under worst-case conditions. Finally, run accelerated life tests (ALT) simulating 85°C ambient with continuous max current to detect early failures in gate drivers or internal references. Document all results against your target spec sheet before finalizing BOM selection.

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

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1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

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UCC2805DTRG4

Texas Instruments
41D-UCC2805DTRG4

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UCC2805DTRG4 - Texas Instruments

Specifications

Parts Introduction

Manufacturer Part Number

Manufacturer

Introduction

Product Features and Performance

Product Advantages

Key Reasons to Choose

Quality and Safety Features

Compatibility

Application Areas

Product Lifecycle

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

Solid diode for power rectification. Works well in switching circuits.

Compact FPGA with good performance. Suitable for basic signal processing tasks.

Reliable I/O expander. Works well in embedded control applications.

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

Write a Review

Shipment

Delivery Time

Delivery Cost

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Packaging

Electrostatic Discharge Protection and Handling

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UCC2805DTRG4

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Please refer to the English Version as our Official Version.