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Analog Devices Inc. LT8302MPS8E#TRPBF
- Part No.:
- LT8302MPS8E#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
LT8302MPS8E#TRPBF.pdf
- Description:
- IC REG FLYBACK 3.6A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,447
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Product details
Overview
LT8302MPS8E#TRPBF from Analog Devices is a monolithic micropower isolated flyback controller IC with integrated 65V/3.6A DMOS switch, operating from 3V to 42V input and delivering up to 18W 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 auxiliary power supplies for automotive and industrial systems.
For engineers reviewing the LT8302MPS8E#TRPBF datasheet, LT8302MPS8E#TRPBF pinout, LT8302MPS8E#TRPBF application, or LT8302MPS8E#TRPBF equivalent, this device supports no-opto isolated DC/DC design with 106µA sleep-mode quiescent current, ±5% output regulation accuracy, AEC-Q100 qualification, and thermally enhanced 8-lead SO package with exposed GND pad.
Technical Context
The LT8302MPS8E#TRPBF implements quasi-resonant boundary conduction mode at heavy load and low-ripple Burst Mode® at light load, using a sample-and-hold error amplifier that samples the SW pin voltage when secondary current reaches zero. Its flyback pulse sensing circuit eliminates need for opto-isolators or auxiliary windings while maintaining tight load regulation.
It integrates internal 3V LDO (INTVCC), accurate 1.214V EN/UVLO threshold with 14mV hysteresis, temperature-compensated feedback via TC pin (3.35mV/K PTAT), and programmable output voltage via RFB/RREF resistor divider referenced to 1.00V internal reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 42V - supports wide-input industrial and automotive battery rails including cold-crank and load-dump conditions. |
| Integrated Switch | 65V/3.6A DMOS - enables single-chip isolated flyback with no external high-voltage MOSFET required. |
| Quiescent Current | 106µA sleep mode - minimizes standby power loss in always-on auxiliary supplies. |
| Output Regulation | ±5% typical accuracy - achieved via primary-side sampling and internal 1.00V reference, eliminating opto drift and aging errors. |
| Operating Temperature | –55°C to +150°C junction - qualified per AEC-Q100 Grade MP, suitable for under-hood automotive and harsh industrial environments. |
| Switching Modes | Boundary mode (heavy load) + Low-ripple Burst Mode® (light load) - balances efficiency (>85% at full load) and output ripple (<50mV p-p). |
| Package | 8-Lead Plastic SO with exposed GND pad - θJA = 33°C/W thermal resistance enables >18W operation without heatsink. |
Pinout & Package
LT8302MPS8E#TRPBF is housed in an 8-lead plastic SO package with exposed GND pad (Pin 9), requiring soldering to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable / Input Undervoltage Lockout | Accurate 1.214V enable threshold with 14mV hysteresis; used to program VIN UVLO or shut down chip below 0.3V. |
| INTVCC (Pin 2) | Internal 3V Regulator Output | Powers internal logic and gate driver; must be bypassed with ≥1µF ceramic capacitor to GND - no external supply allowed. |
| VIN (Pin 3) | Main Input Supply | Supplies control circuitry and serves as reference for RFB feedback network; requires local bulk capacitance. |
| GND (Pin 4 + Exposed Pad Pin 9) | Power and Signal Ground | Common return for all circuits; exposed pad provides critical thermal path - must be soldered to large PCB ground plane. |
| SW (Pin 5) | Drain of Internal Power Switch | Connects to transformer primary; high dv/dt node - minimize trace area to reduce EMI and voltage spikes. |
| RFB (Pin 6) | Feedback Input from Flyback Pulse | Converts SW flyback voltage into current proportional to VOUT; determines output voltage with RREF and transformer turns ratio. |
| RREF (Pin 7) | Reference Resistor Connection | Ground-referenced node for RREF resistor; sets gain for RFB current; trimmed for 10k nominal value. |
| TC (Pin 8) | Temperature Compensation Output | PTAT voltage (3.35mV/K) used to offset diode VF drift; connects to RREF via RTC resistor for 5V/3.3V output stability. |
Key Features
| Feature | Design Value |
|---|---|
| No-opto isolated regulation | Eliminates opto-isolator cost, aging, and bandwidth limitations - achieves stable regulation using only primary-side sampling. |
| Boundary + Burst Mode operation | Enables high efficiency (>85%) across full load range: boundary mode minimizes transformer size; Burst Mode reduces light-load IQ to 106µA. |
| Integrated 65V/3.6A DMOS switch | Reduces BOM count and layout complexity - supports up to 18W isolated output without external high-voltage FET. |
| AEC-Q100 Grade MP qualification | Validated for –55°C to +150°C operation - meets automotive reliability requirements for engine control, ADAS, and body electronics. |
| Temperature-compensated feedback | TC pin enables <±2% output variation over temperature for 5V/3.3V outputs - compensates for Schottky diode VF drift without external sensors. |
Applications
| Automotive Auxiliary Power | Industrial Isolated Sensors |
|---|---|
Use Scenario: Providing isolated 5V/1A housekeeping power to CAN transceivers and microcontrollers in engine control units. IC Role / Device Role / Timing Role: Primary-side flyback controller regulating isolated output without opto-isolator or third winding. Use Value: Reduces component count and improves long-term reliability versus opto-based solutions in high-temperature under-hood environments. | Use Scenario: Powering isolated analog front-ends and ADCs in factory automation I/O modules with 4–20mA loop interfaces. IC Role / Device Role / Timing Role: Micropower isolated DC/DC converter delivering stable 3.3V from 24V industrial bus. Use Value: Enables galvanic isolation compliance while maintaining <106µA standby draw during system sleep states. |
| Medical Patient Monitoring | Telecom Remote PHY Units |
Use Scenario: Generating isolated 5V bias for ECG front-end amplifiers and isolated data acquisition in portable patient monitors. IC Role / Device Role / Timing Role: No-opto flyback controller ensuring creepage/clearance compliance without optocoupler CMTI limitations. Use Value: Meets IEC 60601-1 reinforced isolation requirements with simplified certification due to absence of opto aging variables. | Use Scenario: Supplying isolated 12V/1.5A to remote PHY chips in fiber-to-the-home (FTTH) nodes mounted on utility poles. IC Role / Device Role / Timing Role: High-efficiency isolated power stage operating from wide-range 36–72V telecom battery backup. Use Value: Delivers >85% efficiency at full load and maintains <50mV output ripple in Burst Mode for noise-sensitive RF signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3748EMSE#TRPBF | Requires external MOSFET; no integrated switch; higher minimum input (4.5V); supports higher output power (up to 40W). | Suitable for designs needing >18W or higher VIN (>42V); lacks integrated switch and TC compensation pin. | Select when higher power or input voltage headroom is required; adds external FET but offers greater flexibility in transformer design. |
| UCC28911DR | TI part with integrated 700V MOSFET; fixed 65kHz frequency; no TC pin; lower quiescent current (70µA sleep). | Better suited for universal AC input (85–265VAC) offline flyback; not rated for automotive temperature or AEC-Q100. | Choose for cost-sensitive AC/DC adapters; avoid for automotive or precision DC/DC where TC compensation and wide temp range are critical. |
Compared with LT3748EMSE#TRPBF and UCC28911DR, the LT8302MPS8E#TRPBF uniquely combines integrated 65V/3.6A switch, AEC-Q100 MP-grade qualification, and on-chip temperature compensation - making it optimal for space-constrained, high-reliability isolated DC/DC in automotive and industrial settings.
Availability
LT8302MPS8E#TRPBF is available at Aetrix Electronics and suitable for automotive auxiliary power supplies, industrial sensor interfaces, and medical isolation barriers requiring stable component supply with extended temperature support and AEC-Q100 compliance.
Supply support for LT8302MPS8E#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 LT8302 product line delivers micropower isolated flyback controllers optimized for no-opto, compact, and AEC-Q100-compliant auxiliary power in harsh environments - targeting engine control, ADAS, and industrial IoT edge nodes.
FAQ
What is the maximum isolated output power achievable with LT8302MPS8E#TRPBF?
The LT8302MPS8E#TRPBF delivers up to 18W of isolated output power, validated across its 3V–42V input range with appropriate transformer design and layout. At VIN = 24V and VOUT = 5V, typical maximum continuous output is 2.9A (14.5W); peak capability reaches 18W with optimized magnetics and thermal management on a 2-layer PCB with exposed GND pad soldered.
Does LT8302MPS8E#TRPBF require an opto-isolator or third transformer winding?
No, the LT8302MPS8E#TRPBF does not require an opto-isolator or third transformer winding. It regulates output voltage by sampling the primary-side flyback waveform at the SW pin when secondary current reaches zero - a proprietary no-opto technique that eliminates opto aging, bandwidth limits, and extra winding cost/complexity.
What is the purpose of the TC pin on LT8302MPS8E#TRPBF?
On the LT8302MPS8E#TRPBF, the TC pin provides a proportional-to-absolute-temperature (PTAT) voltage (3.35mV/K) used to compensate for the negative temperature coefficient of the output rectifier diode. Connecting a resistor (RTC) between TC and RREF injects temperature-dependent current to maintain ±2% output voltage stability over –55°C to +150°C for 3.3V/5V outputs.
Is LT8302MPS8E#TRPBF AEC-Q100 qualified, and what grade does it meet?
Yes, the LT8302MPS8E#TRPBF is AEC-Q100 qualified and belongs to the MP (Military/High-Reliability) grade, specified for operation from –55°C to +150°C junction temperature. It is fully tested and characterized per AEC-Q100 stress test conditions, making it suitable for under-hood automotive applications including engine control, transmission modules, and ADAS power domains.
How does LT8302MPS8E#TRPBF achieve low quiescent current in sleep mode?
The LT8302MPS8E#TRPBF achieves 106µA sleep-mode quiescent current by disabling the internal gate driver, oscillator, and high-voltage bias circuits while retaining core monitoring functions. When EN/UVLO falls below 0.3V or output load drops below ~0.5% of full scale, the IC enters sleep mode - reducing power consumption while maintaining fast wake-up response for burst-mode operation.
LT8302MPS8E#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 or Negative, Isolation Capable
- Topology:
- Flyback
- Output Type:
- -
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- 3.6A
- Frequency - Switching:
- Down to 12kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
LT8302MPS8E#TRPBF FAQ
1.How can I place an order for LT8302MPS8E#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8302MPS8E#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 LT8302MPS8E#TRPBF reliable?
The price and inventory of LT8302MPS8E#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8302MPS8E#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8302MPS8E#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8302MPS8E#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8302MPS8E#TRPBF?
LT8302MPS8E#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8302MPS8E#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 LT8302MPS8E#TRPBF?
For technical support, including LT8302MPS8E#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8302MPS8E#TRPBF requirements.
6.How does Aetrix verify that LT8302MPS8E#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8302MPS8E#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 LT8302MPS8E#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8302MPS8E#TRPBF?
All LT8302MPS8E#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8302MPS8E#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 LT8302MPS8E#TRPBF part is unused and in its original packaging.
Return procedure for LT8302MPS8E#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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