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UC3851DWTR PMIC - AC DC Converters, Offline Switchers by Texas Instruments

UC3851DWTR is a PMIC - AC DC Converters, Offline Switchers from Texas Instruments in 18SOIC packaging. It is commonly reviewed for IC OFFLINE CTRLR PWM PROG 18SOIC. This page lists current TrustCompo stock, tier pricing, package data, datasheet access, compliance attributes, Hong Kong warehouse shipping options, payment confirmation, and RFQ options for buyers verifying this exact ordering code.

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UC3851DWTR PMIC - AC DC Converters, Offline Switchers by Texas Instruments | TrustCompo
Pictures are for reference only. Please contact us for the latest pictures.
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Key specifications

Part Number

UC3851DWTR

Internal code

TCE000092179

Package

18SOIC

Manufacturer
Texas Instruments

Key specifications

Series

-

Min Quantity

1

Description

IC OFFLINE CTRLR PWM PROG 18SOIC

key Attributes

-

Trust signals

Quality and trust signals

Review TrustCompo quality credentials, traceability support, anti-counterfeit handling, and inspection controls before sending an RFQ.

4 certifications
  • ISO 9001

    Quality management processes for more consistent sourcing and handling.

  • AS9120B

    Aerospace-focused distribution controls for traceability and reliability.

  • ISO 14001

    Environmental management discipline across warehouse and operating workflows.

  • ESD Control

    Electrostatic handling standards to help protect sensitive components.

RFQ checklist

Order process

Confirm the core buying details for UC3851DWTR before RFQ, PO release, and shipment planning.

  1. 1

    Confirm MPN

    Use the exact part number, manufacturer, package, and approval constraints in the RFQ.

  2. 2

    Check stock and price

    Verify live availability, MOQ, lead time, final unit price, and tax terms before PO release.

  3. 3

    Align documents

    Confirm datasheet, CoC, traceability, lifecycle notes, and inspection scope when required.

  4. 4

    Arrange shipment

    Release the PO and align DHL, FedEx, UPS, or buyer forwarder shipment from Hong Kong.

Before PO release

Part confirmation

  • Exact MPN confirmed: UC3851DWTR
  • Package to verify: 18SOIC

Commercial confirmation

  • Live stock and lead time confirmed by RFQ
  • Final price and tax terms confirmed before PO release

Fulfillment & documents

  • Ship-from location: Hong Kong warehouse
  • Shipping method: DHL, FedEx, UPS, or buyer forwarder account

Product overview

Product overview

Review the sourcing context for UC3851DWTR from Texas Instruments, including product identity, application fit, package notes, and purchasing considerations.


The UC3842 is available in an 8-Pin mini-DIP the necessary features to implement off-line, fixed-frequency current-mode control schemes with a minimal external parts count. This technique results in improved line regulation, enhanced load response characteristics, and a simpler, easier to design control loop. Topological advantages include inherent pulse-by-pulse current limiting.Protection circuitry includes built-in undervoltage lock-out and current limiting. Other features include fully-latched operation, a 1% trimmed bandgap reference, and start-up current less than 1mA.
These devices feature a totem-pole output designed to source and sink high peak current from a capacitive load, such as the gate of a power MOSFET. Consistent with N-channel power devices, the output is low in the OFF-state.
FEATURES
• Low start-up current (≤1mA)
• Automatic feed-forward compensation
• Pulse-by-pulse current limiting
• Enhanced load response characteristics
• Undervoltage lock-out with hysteresis
• Double pulse suppression
• High current totem-pole output
• Internally-trimmed bandgap reference
• 400kHz operation, guaranteed minAPPLICATIONS
• Off-line switched mode power supplies
• DC-to-DC converters UC3842

Technical parameters

Parameters

Compare grouped UC3851DWTR parameters from Texas Instruments, including package, series, key attributes, and technical values used for engineering and sourcing review.

  • Export Classifications & Environmental

    RoHS Status

    ROHS3 Compliant

  • Export Classifications & Environmental

    JESD-609 Code

    e4

  • Export Classifications & Environmental

    Moisture Sensitivity Level (MSL)

    2 (1 Year)

  • Export Classifications & Environmental

    ECCN Code

    EAR99

  • Product Parameter

    Terminal Finish

    Nickel/Palladium/Gold (Ni/Pd/Au)

  • Product Parameter

    Analog IC - Other Type

    SWITCHING CONTROLLER

UC3851DWTR Export Classifications & Environmental
ParameterValue
RoHS Status

Indicates whether the component complies with the EU RoHS directive restricting hazardous substances. Buyers should verify this status for regulatory compliance and market access. Check the datasheet or certificate for exact compliance details.

ROHS3 Compliant
JESD-609 Code

This code indicates the terminal finish material per JESD-609 standard. It helps identify the plating type for soldering compatibility and environmental compliance. Check the datasheet for the exact code and its meaning.

e4
Moisture Sensitivity Level (MSL)

Indicates the floor life of a component before it must be baked prior to soldering. Higher levels require stricter handling and shorter exposure times. Verify the MSL rating in the datasheet to ensure proper storage and assembly conditions.

2 (1 Year)
ECCN Code

Export Control Classification Number assigned by the U.S. Commerce Department. It determines export licensing requirements for electronic components. Verify the ECCN against the manufacturer's datasheet or export compliance documentation before shipping internationally.

EAR99
UC3851DWTR Product Parameter
ParameterValue
Terminal Finish

Specifies the plating material on component terminals, affecting solderability, corrosion resistance, and long-term reliability. Compare finishes like tin, gold, or silver for your assembly process and environmental requirements. Verify against datasheet for compliance.

Nickel/Palladium/Gold (Ni/Pd/Au)
Analog IC - Other Type

Select this category when the analog integrated circuit does not fit standard classifications like op-amps, comparators, or regulators. Verify the exact function and pinout in the datasheet to ensure compatibility with your circuit design and performance requirements.

SWITCHING CONTROLLER
Internal Switch(Es)

Indicates the number of switches integrated inside the component. This is critical for power management ICs, multiplexers, or relay drivers where the internal topology determines external wiring. Verify against the datasheet to ensure the device matches your circuit's switching requirements.

No
Rise Time

Time required for a signal to transition from a low to a high level, typically measured between 10% and 90% of the amplitude. Important for digital interfaces, switching regulators, and pulse circuits. Check the datasheet for test conditions and load capacitance.

50ns
Total Dose

Total ionizing dose tolerance for radiation-hardened components. Indicates maximum cumulative radiation exposure before performance degrades. Critical for aerospace, nuclear, and medical applications. Verify against datasheet for mission-specific radiation requirements.

2.35mm
Control Features

Specifies additional control functions like enable, soft-start, or power-good. These features affect system design and sequencing. Verify which controls are available in the datasheet to ensure compatibility with your application requirements.

Frequency Control, Soft Start
Duty Cycle

Represents the ratio of on-time to the total switching period in a PWM signal. It determines the output voltage in switching converters. Check the maximum and minimum duty cycle limits in the datasheet to ensure proper operation across your input range.

50%
Start-Up Voltage

Minimum input voltage required for the device to begin normal operation. Compare this value with your power supply's output to ensure reliable start-up. Verify against the datasheet's recommended operating conditions.

8V
RF Family/Standard

Indicates the wireless communication standard or protocol family, such as Bluetooth, Wi-Fi, or Zigbee. Helps identify compatibility with target applications and system requirements. Verify against the datasheet to ensure the device supports the required RF standard.

20V
Function

Specifies the logical or operational function of the component, such as switching, amplification, or regulation. This attribute helps identify the device's role in a circuit. Verify the function against the datasheet to ensure it matches your application requirements.

VOLTAGE-MODE
Frequency - Switching

Indicates the switching frequency of a power converter or regulator. Higher frequencies allow smaller magnetics but may increase losses. Compare with your design's efficiency and EMI requirements, and verify the actual range in the datasheet.

Up to 500kHz
Nominal Input Voltage

Specifies the standard input voltage level for which the component is designed to operate. Engineers compare this to the actual supply voltage to ensure compatibility. Always verify against the datasheet for absolute maximum ratings and recommended operating conditions.

30V
Voltage - Supply (Vcc/Vdd)

Indicates the recommended supply voltage range for the component. This is critical for proper operation and must be matched to your power rail. Always verify the absolute maximum ratings and recommended operating conditions in the datasheet to avoid damage or malfunction.

7.8V~32V
Active Read Current (Max)

Specifies the highest current drawn by the device during an active read operation. Compare this value across memory or logic components to estimate power consumption in normal operation. Verify against the datasheet's test conditions, as current can vary with frequency and supply voltage.

Non-Isolated
Number Of Backplanes

Indicates how many backplane boards the system or chassis can accommodate. Compare this value with your enclosure's slot capacity and the backplane's form factor to ensure proper fit and signal routing. Verify against the datasheet for supported configurations.

46 %
UC3851DWTR Product Attribute
ParameterValue
Part Status

Lifecycle status of the part, such as active or obsolete. Indicates availability and long-term support from the manufacturer. Check this before design-in to avoid last-time buys or supply disruptions. Verify with the datasheet or distributor for current status.

Active
Lead Free

Indicates whether the component is manufactured without lead, complying with RoHS and similar regulations. Check this attribute to ensure environmental compliance for your market. Verify against the datasheet for exact material declarations.

Lead Free
Lifecycle Status

Current stage in the product's lifecycle, such as Active, Obsolete, or End of Life. This indicates availability and long-term supply risk. Check this before designing in a part to ensure it will be available for your product's production lifetime.

ACTIVE (Last Updated: 3 days ago)
Mounting Type

Specifies how the component is attached to the PCB, such as through-hole or surface mount. This affects assembly processes, thermal performance, and mechanical strength. Buyers should verify compatibility with their manufacturing capabilities and design requirements.

Surface Mount
Factory Lead Time

Indicates the typical duration from order confirmation to shipment from the manufacturer's facility. This helps you plan production schedules and inventory. Verify current lead times with your distributor or supplier, as they may vary based on order quantity, product availability, and market conditions.

6 Weeks
Packaging

Indicates the form of delivery for the component, such as tape and reel, tube, or tray. This affects handling, storage, and assembly processes. Verify the packaging type matches your production requirements and equipment compatibility.

Tape & Reel (TR)
Categories

Lists the product categories or classifications assigned to this component, such as connectors, capacitors, or modules. This helps in filtering and comparing similar parts. Review the categories to ensure the component fits your application and to find alternative parts in the same class.

Integrated Circuits (ICs)
Terminal Position

Position of the terminals on the package, such as dual-in-line, gull-wing, or J-lead. This affects PCB layout, soldering, and thermal performance. Engineers must ensure the terminal position matches the footprint and assembly capabilities of their manufacturing line.

DUAL
Peak Reflow Temperature (Cel)

Maximum temperature during reflow soldering that the component can withstand. This is critical for solder joint reliability and preventing damage. Verify that the peak reflow temperature is compatible with your soldering profile and the component's moisture sensitivity level.

260
Terminal Form

Describes the physical configuration of the component's leads or pads, such as through-hole, surface mount, or gull-wing. This affects PCB layout, soldering process, and mechanical fit. Confirm compatibility with your assembly method and footprint.

GULL WING
Manufacturer

Identifies the company that designed and produced the component. Buyers often filter by manufacturer to ensure brand reliability, quality standards, and supply chain consistency. Verify the manufacturer against the datasheet and official packaging to avoid counterfeit parts.

Texas
Operating Temperature

Specifies the ambient temperature range within which the component reliably functions. Compare this with your application's thermal environment to ensure proper operation. Always verify against the datasheet for derating curves and maximum ratings.

0°C~70°C TA
Technology

Manufacturing technology or process used for the component, such as thin film, thick film, or semiconductor process. Affects performance, stability, and cost. Confirm the technology matches your application requirements and environmental conditions.

BICMOS
Subcategory

A more specific classification within the main product category, such as 'Ceramic Capacitor' under 'Capacitors'. This helps narrow down search results and compare similar components. Use it to filter products with similar characteristics and intended applications.

Switching Regulator or Controllers
Sub-Categories

Indicates the specific product subcategories or classifications within the broader component family. Helps narrow down search results and identify the exact type of component needed for your design. Review the subcategory to ensure compatibility with your application.

PMIC - AC DC Converters, Offline Switchers
Package / Case

Physical package or case type of the component, defining its dimensions, mounting style, and thermal characteristics. Common types include SMD, through-hole, BGA, and QFN. Choose the package that fits your PCB layout and assembly process. Verify the exact package code in the datasheet for footprint compatibility.

18-SOIC (0.295, 7.50mm Width)
Number Of Functions

Specifies the count of independent functions or channels integrated into a single component package. This helps engineers determine if the part can handle multiple signal paths or operations simultaneously. Verify against the datasheet to ensure the device meets your circuit's functional requirements.

1
Surface Mount

Mounting type: surface mount or through-hole. Surface mount components are placed directly on the PCB, saving space and enabling automated assembly. Through-hole components offer stronger mechanical bonds. Verify the mounting style matches your PCB design and assembly process.

YES
Width

Physical width of the component body, typically in millimeters. Essential for PCB footprint design and mechanical fit. Verify against the datasheet to ensure proper clearance and compatibility with your board layout and enclosure.

7.5mm
Pb-Free Code

Indicates whether the component is lead-free per RoHS or other directives. Buyers use this to verify environmental compliance and avoid restricted substances. Always confirm with the datasheet or certificate of compliance.

yes
Number Of Outputs

Specifies how many independent output channels the component provides. Compare this when selecting power supplies, drivers, or modules to ensure the device can drive all required loads. Always verify against the datasheet for exact output configuration.

1
Number Of Terminations

Indicates the total number of electrical connection points on the component, such as pins or pads. This is critical for PCB footprint design and assembly. Verify it matches the package specification to ensure proper soldering and connectivity.

18
Number Of Pins

Total number of pins or contacts on the component. This determines the footprint and mating connector requirements. Always match the pin count to your PCB layout and connector specification to ensure proper electrical and mechanical connection.

18
Pin Count

Total number of pins or terminals on the component package. Essential for footprint design, PCB layout, and connector mating. Verify against the datasheet to ensure compatibility with your board and assembly process.

18
Nominal Supply Current

Typical current drawn from the supply under nominal operating conditions. Compare this value across similar components to estimate power consumption and thermal behavior. Always verify against the datasheet for your specific voltage and load conditions.

15mA
Height

Physical height of the component, measured from the mounting surface to the topmost point. This dimension is critical for clearance in compact assemblies and for ensuring proper fit within enclosures. Always verify against the datasheet for tolerance and mounting considerations.

2.65mm
Output Current

Current supplied at the output, indicating the load-driving capability of the component. This is crucial for ensuring the component can drive downstream circuitry without overheating or voltage drop. Compare with your load requirements and check the datasheet for maximum ratings.

400mA
Length

Specifies the physical length of the component body, typically in millimeters. This dimension is critical for PCB layout and mechanical fit. Verify against the datasheet to ensure proper clearance and alignment in your design.

11.5mm
Output Voltage

Specifies the regulated voltage level available at the output pin under specified load and input conditions. Compare this value with your circuit requirements and verify against the datasheet's tolerance and temperature derating.

40V
Data Rate (Max)

Maximum data transfer rate supported. This is crucial for high-speed communication interfaces. Ensure the component can handle your required throughput with margin. Compare with the datasheet's specifications to avoid bottlenecks in your data path.

PULSE WIDTH MODULATION
Frequency

Operating frequency of the component, typically the clock or switching frequency. This determines the speed of operation and affects power dissipation and signal integrity. Verify the frequency range against your application's requirements and the datasheet specifications.

450kHz
Package Contents

Specifies the items included in the product package, such as connectors, cables, mounting hardware, or documentation. Verify this list against the datasheet or manual to ensure you have all necessary components for installation and operation.

50 ns
Serial Interfaces

List of supported serial communication interfaces, such as SPI, I2C, UART, or CAN. This determines how the component communicates with your system. Verify that the required interfaces are available and compatible with your microcontroller or processor.

BUCK-BOOST
ESD Protection

Indicates whether the component has built-in electrostatic discharge protection. This is crucial for devices that interface with external connectors or are handled during assembly. ESD protection helps prevent damage from static electricity, improving reliability in harsh environments. Verify if your application requires this feature.

Boost, Buck, Flyback, Forward
Base Part Number

Identifies the core product family without package, grade, or option suffixes. Use this to compare equivalent components across manufacturers and to locate the primary datasheet. Verify the full ordering code against the manufacturer's specification before design-in.

UC3851
Harmonic Distortion

Measures the amount of unwanted harmonics added to the output signal relative to the fundamental frequency, often expressed as THD. Lower values indicate cleaner signal reproduction, which is critical for audio and precision measurement applications. Verify the test frequency and conditions in the datasheet.

1W
Power - Output

Output power rating of the component. This is critical for amplifiers, transmitters, and power supplies. Ensure the component can deliver the required power to your load without exceeding its ratings. Check the datasheet for conditions and tolerances.

Current Limiting, Over Voltage
Additional Feature

Lists any extra characteristics or capabilities beyond the standard specifications, such as built-in protection, special mounting options, or enhanced performance. Review these features to ensure they meet your application's specific needs and compare them across similar parts.

CURRENT MODE OPERATION IS ALSO POSSIBLE
Manufacturer'S Part No.

The unique part number assigned by the original component manufacturer. Use this to cross-reference datasheets, verify specifications, and ensure the exact component matches your design requirements. Always confirm the number against the manufacturer's official documentation.

UC3851DWTR

Notice documents

PCN / product notice documents

0 documents

No public PCN / PDN records currently displayed

No public product notice document is currently displayed for UC3851DWTR. Confirm PCN, PDN, EOL, date code, and lifecycle status during RFQ before production purchase.

Common questions

Product FAQ

Targeted answers for buyers verifying the exact UC3851DWTR ordering code, packaging, stock, datasheet, and replacement path.

What does UC3851DWTR mean?

UC3851DWTR is the exact ordering code listed for a PMIC - AC DC Converters, Offline Switchers component from Texas Instruments. The current package reference is 18SOIC, with listed context including IC OFFLINE CTRLR PWM PROG 18SOIC. Buyers should use the full code when requesting stock, price, datasheet, or compliance confirmation.

Is UC3851DWTR the same as UC3851DW?

UC3851DWTR may share the same base part family as UC3851DW, but the suffix can identify ordering, reel, tape, packing, or logistics details. Confirm the 18SOIC package, manufacturer code from Texas Instruments, datasheet ordering table, and reel quantity before treating the two codes as interchangeable.

What package is UC3851DWTR supplied in?

UC3851DWTR is currently listed with package reference 18SOIC from Texas Instruments. Buyers should confirm the manufacturer package drawing, footprint, pinout, tape-and-reel details, and receiving requirements before approval.

Is UC3851DWTR currently available?

UC3851DWTR is currently marked with stock availability on this page. Before ordering, confirm the package (18SOIC), listed stock (27436), available quantity (12481), required quantity, lead time, final price, compliance needs, and exact ordering code match through RFQ.

Where can I compare UC3851DWTR alternatives?

A mapped alternative list is not currently published for UC3851DWTR. Send an RFQ with the target quantity, package constraints, and approval requirements so TrustCompo can help review credible replacement options.