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Analog Devices Inc. LT3002IS8E#TRPBF
- Part No.:
- LT3002IS8E#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
LT3002IS8E#TRPBF.pdf
- Description:
- IC REG FLYBACK ADJ 3.6A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,877
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Product details
Overview
LT3002IS8E#TRPBF from Analog Devices is a monolithic micropower isolated flyback converter IC with integrated 3.6A/65V DMOS switch, operating from 4V to 36V input and delivering up to 10W isolated output power. It regulates output voltage without opto-isolator or third transformer winding by sampling the primary-side flyback waveform in boundary mode, enabling compact, high-efficiency auxiliary power supplies for industrial and automotive systems.
For engineers reviewing the LT3002IS8E#TRPBF datasheet, LT3002IS8E#TRPBF pinout, LT3002IS8E#TRPBF application, or LT3002IS8E#TRPBF equivalent, key selection factors include its 12kHz minimum switching frequency, 160ns minimum on-time, 350ns minimum off-time, ±1% RREF reference accuracy, and thermally enhanced 8-lead SO package with exposed GND pad.
Technical Context
The LT3002IS8E#TRPBF implements current-mode control in quasi-resonant boundary conduction mode at heavy load and low-ripple Burst Mode® operation at light load, ensuring stable regulation across 0.5%–100% load range. Its internal 3V linear regulator (INTVCC) powers control circuitry, while EN/UVLO provides programmable undervoltage lockout with 1.214V threshold and 14mV hysteresis.
Output voltage is set via external RFB/RREF resistors referenced to a 1.00V internal bandgap, with optional temperature compensation via TC pin (PTAT 3.35mV/°K). The device samples reflected output voltage during zero-secondary-current intervals, eliminating need for optocouplers or auxiliary windings while maintaining <±1% output variation over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports wide-input industrial and automotive battery-supplied systems |
| Max Output Power | 10W - enables isolated housekeeping rails for PLCs, sensors, and gate drivers |
| Internal Switch | 3.6A, 65V DMOS - handles 32V input with 15V leakage margin; eliminates external MOSFET |
| RREF Accuracy | ±1% (0.98V to 1.02V) - ensures precise output voltage programming without calibration |
| Quiescent Current | 0.5µA (shutdown), 380µA (active) - extends battery life in always-on isolated monitoring circuits |
| Switching Frequency | 11.3–12.7kHz min - guarantees reliable sampling of reflected flyback pulse for regulation |
| Min On/Off Time | 160ns / 350ns - constrains transformer design but prevents leading-edge blanking failure |
Pinout & Package
LT3002IS8E#TRPBF uses an 8-lead plastic SOIC (S8E) package with exposed thermal pad (Pin 9, GND), θJA = 33°C/W. The exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable/Undervoltage Lockout Input | Shuts down IC below 0.3V; 1.214V enable threshold with 14mV hysteresis enables programmable VIN UVLO |
| INTVCC (Pin 2) | Internal 3V Regulator Output | Powers internal logic/gate driver; requires ≥1µF ceramic bypass to GND; no external supply allowed |
| VIN (Pin 3) | Main Input Supply | Supplies internal circuitry and serves as reference for RFB feedback network |
| GND (Pin 4 + Exposed Pad Pin 9) | Ground Reference | Primary ground return; exposed pad is mandatory GND connection for thermal management |
| SW (Pin 5) | Drain of Internal DMOS Switch | Connects to transformer primary; trace area must be minimized to reduce EMI and voltage spikes |
| RFB (Pin 6) | Feedback Resistor Input | Connects to SW node; ratio with RREF sets VOUT per VREF × (RFB/RREF) × (1/NPS) – VF |
| RREF (Pin 7) | Reference Resistor Input | Ground-referenced resistor (typically 10kΩ) establishes 1.00V reference scaling for output voltage |
| TC (Pin 8) | Temperature Compensation Output | PTAT voltage (3.35mV/°K) used to offset diode VF drift; connects to RREF via RTC for stable output over temperature |
Key Features
| Feature | Design Value |
|---|---|
| No-opto isolation | Eliminates optocoupler and third winding-reduces BOM count, cost, and size while avoiding aging/nonlinearity issues |
| Boundary + Burst Mode | Enables >85% efficiency from 10mA to full load; maintains low output ripple (<50mV) even at light loads |
| Integrated 65V DMOS switch | Removes need for external high-voltage MOSFET and associated gate drive components |
| Accurate 1.00V RREF | Enables ±1% output voltage tolerance without trimming; simplifies resistor selection for common 5V/12V outputs |
| Programmable temperature compensation | TC pin allows cancellation of output diode forward voltage drift, stabilizing VOUT over –40°C to 125°C |
Applications
| Industrial PLC Auxiliary Power | Automotive Body Control Module |
|---|---|
Use Scenario: Isolated 5V rail powering microcontrollers and CAN transceivers in programmable logic controllers with 24V DC input. IC Role / Device Role / Timing Role: Primary-side flyback controller regulating isolated output without optocoupler, using boundary mode for tight load regulation. Use Value: Reduces component count by 4 parts (opto + bias winding + two resistors) versus traditional solutions, improving long-term reliability in harsh factory environments. | Use Scenario: 12V-to-5V isolated housekeeping supply for automotive body control modules requiring AEC-Q200 compliance. IC Role / Device Role / Timing Role: Micropower flyback controller with 0.5µA shutdown current and 125°C junction rating for under-hood applications. Use Value: Enables cold-cranking operation down to 4V input while maintaining regulated 5V output, critical for start-stop systems. |
| Medical Sensor Isolation | Industrial IoT Gateway Power |
Use Scenario: Galvanically isolated 3.3V supply for patient-connected biosensors requiring reinforced insulation per IEC 60601-1. IC Role / Device Role / Timing Role: No-opto flyback controller sampling primary-side waveform to meet creepage/clearance requirements without secondary-side feedback components. Use Value: Achieves >5kV isolation with standard transformers, eliminating optocoupler CMTI limitations and aging-related calibration drift. | Use Scenario: Compact 24V-to-5V isolated power for edge AI gateways with Ethernet and RS-485 interfaces. IC Role / Device Role / Timing Role: High-integration flyback IC delivering 10W with minimal external components, supporting burst-mode efficiency at standby. Use Value: Meets Energy Star Level VI standby power requirements (<30mW) while providing robust 5V/2A output for dual Ethernet PHYs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28911DR | Fixed 70kHz frequency; no programmable UVLO hysteresis; 700V integrated MOSFET | Better suited for universal AC input (85–265VAC); higher voltage stress limits use in low-VIN industrial apps | Select UCC28911DR only when designing for AC/DC front-end; not drop-in for 4–36V DC input systems |
| MAX17690ATP+T | 40V max input; 2.5A/60V switch; requires external optocoupler for regulation | Needs opto + third winding; higher BOM cost and larger footprint; lower max power (6W typical) | Choose MAX17690ATP+T only if legacy opto-based design reuse is required; inferior integration vs LT3002IS8E#TRPBF |
Compared with UCC28911DR and MAX17690ATP+T, LT3002IS8E#TRPBF uniquely combines wide 4–36V DC input, no-opto regulation, and 10W capability in an 8-pin SO package-enabling smallest PCB area and lowest component count for DC-fed isolated auxiliary supplies.
Availability
LT3002IS8E#TRPBF is available at Aetrix Electronics and suitable for industrial PLC auxiliary power, automotive body control modules, medical sensor isolation, and industrial IoT gateway power requiring stable component supply and long lifecycle support.
Supply support for LT3002IS8E#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3002 product line delivers highly integrated isolated flyback controllers targeting space-constrained, low-noise auxiliary power applications where optocoupler-free operation and wide input range are critical.
FAQ
What is the maximum input voltage rating for LT3002IS8E#TRPBF?
The LT3002IS8E#TRPBF has an absolute maximum VIN rating of 42V, with recommended continuous operation up to 36V. The internal 65V DMOS switch allows safe operation with 15V leakage spike margin at 32V input, as confirmed in the datasheet's design example and absolute maximum ratings table.
Does LT3002IS8E#TRPBF require an optocoupler for regulation?
No, LT3002IS8E#TRPBF does not require an optocoupler. It achieves regulation by sampling the isolated output voltage directly from the primary-side flyback waveform during zero-secondary-current intervals, eliminating optocouplers and third transformer windings as stated in the FEATURES and OPERATION sections.
What is the purpose of the TC pin on LT3002IS8E#TRPBF?
On LT3002IS8E#TRPBF, the TC pin provides a PTAT (proportional-to-absolute-temperature) voltage of 3.35mV/°K, used to compensate for the forward voltage drift of the output diode. Connecting TC to RREF via an RTC resistor cancels temperature-induced output variation, as detailed in the APPLICATIONS INFORMATION section.
Can LT3002IS8E#TRPBF operate with no load?
LT3002IS8E#TRPBF requires a minimum load of <0.5% of full output power (e.g., ~10mA for 5V/2A) to maintain regulation, due to minimum energy delivery needed for accurate flyback pulse sampling. A Zener diode (e.g., 5.6V for 5V output) can serve as a passive minimum load if preloading is unacceptable.
What package type and thermal characteristics does LT3002IS8E#TRPBF use?
LT3002IS8E#TRPBF uses an 8-lead plastic SOIC (S8E) package with exposed thermal pad (Pin 9, GND), specified with θJA = 33°C/W. The exposed pad must be soldered to the PCB ground plane to achieve rated thermal performance and ensure reliable operation at full 10W output.
LT3002IS8E#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Flyback
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 36V
- Current - Output:
- 3.6A
- Frequency - Switching:
- 12kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
LT3002IS8E#TRPBF FAQ
1.How can I place an order for LT3002IS8E#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3002IS8E#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT3002IS8E#TRPBF reliable?
The price and inventory of LT3002IS8E#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3002IS8E#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3002IS8E#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3002IS8E#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3002IS8E#TRPBF?
LT3002IS8E#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3002IS8E#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT3002IS8E#TRPBF?
For technical support, including LT3002IS8E#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3002IS8E#TRPBF requirements.
6.How does Aetrix verify that LT3002IS8E#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3002IS8E#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT3002IS8E#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3002IS8E#TRPBF?
All LT3002IS8E#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3002IS8E#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT3002IS8E#TRPBF part is unused and in its original packaging.
Return procedure for LT3002IS8E#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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