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Analog Devices Inc. LT3002ES8E#TRPBF
- Part No.:
- LT3002ES8E#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
LT3002ES8E#TRPBF.pdf
- Description:
- IC REG FLYBACK ADJ 3.6A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,535
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Product details
Overview
LT3002ES8E#TRPBF from Analog Devices is a monolithic micropower isolated flyback converter IC with integrated 3.6A/65V DMOS power switch, operating from 4V to 36V input and delivering up to 10W isolated output power. It enables opto-isolator–free regulation via primary-side flyback waveform sampling, supports boundary mode for high load regulation, and uses low-ripple Burst Mode® for >75% efficiency at light loads in industrial auxiliary power supplies.
For engineers reviewing the LT3002ES8E#TRPBF datasheet, LT3002ES8E#TRPBF pinout, LT3002ES8E#TRPBF application, or LT3002ES8E#TRPBF equivalent, key selection criteria include its 8-lead SOIC-EP package with exposed GND pad, 1.00V internal reference (RREF), 12kHz minimum switching frequency, 160ns minimum on-time, and accurate EN/UVLO threshold (1.214V) with 14mV hysteresis.
Technical Context
The LT3002ES8E#TRPBF implements current-mode control in quasi-resonant boundary conduction mode at heavy loads and low-ripple Burst Mode® at light loads-enabling stable regulation without third-winding sensing or optocouplers. Its RFB/RREF feedback architecture samples reflected output voltage directly from the SW pin during zero-secondary-current intervals, achieving ±1.5% output voltage accuracy over temperature.
Internal protection includes output short-circuit detection, thermal shutdown, INTVCC UVLO (2.47V), and precise EN/UVLO with programmable hysteresis via external resistor divider. The TC pin provides PTAT voltage (3.35mV/°K) for output diode temperature compensation, supporting stable 5V/1.5A designs across –40°C to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4V to 36V - supports wide-input industrial and automotive auxiliary rails without pre-regulation. |
| Output Power | Up to 10W isolated - enables compact housekeeping supplies for PLCs, motor drives, and medical isolation barriers. |
| Switch Rating | 3.6A, 65V DMOS - handles 32VIN/5VOUT flyback with 3:1 turns ratio and <65V drain stress. |
| RREF Voltage | 1.00V (±2%) - sets output voltage via RFB/RREF ratio, enabling precise 5V, 12V, or custom outputs. |
| fSW(MIN) | 12kHz - ensures reliable boundary-mode operation down to <0.5% full-load, minimizing audible noise. |
| tON(MIN) | 160ns - prevents leading-edge current spike mis-sampling, critical for stable light-load regulation. |
| IQ (Active) | 380µA typical - sustains >90% efficiency at 10mA load in Burst Mode®, reducing standby losses. |
Pinout & Package
LT3002ES8E#TRPBF is housed in an 8-lead plastic SOIC (S8E) with thermally enhanced exposed GND pad (Pin 9), requiring soldering to PCB ground plane for thermal management (θJA = 33°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (1) | Enable / Input UVLO input | 1.214V enable threshold with 14mV hysteresis; sinking 2.5µA below threshold enables programmable VIN lockout. |
| INTVCC (2) | Internal 3V regulator output | Powers internal logic/gate driver; must be bypassed with ≥1µF ceramic capacitor to GND-no external supply allowed. |
| VIN (3) | Main input supply | Supplies internal circuitry and serves as reference for RFB feedback network; requires local bulk capacitance. |
| GND (4, 9) | Power and signal ground | Pins 4 and 9 (exposed pad) are electrically common; pad must be soldered to PCB ground for thermal and EMI performance. |
| SW (5) | Drain of internal DMOS switch | Connects to transformer primary; high dv/dt node-minimize trace area to reduce EMI and voltage spikes. |
| RFB (6) | Feedback voltage sense | Samples reflected output voltage from SW node; ratio with RREF sets VOUT; max 125µA input current. |
| RREF (7) | Reference resistor connection | Connects to GND; sets feedback gain with RFB; nominal 10kΩ, tolerance 9.09k–11.0kΩ for 1% accuracy. |
| TC (8) | Temperature compensation | PTAT voltage (1.00V @ 25°C, 3.35mV/°K); used with RTC resistor to cancel diode VF drift over temperature. |
Key Features
| Feature | Design Value |
|---|---|
| No-opto isolated regulation | Eliminates optocoupler and third winding-reduces BOM count, cost, and aging-related drift in medical/industrial isolation. |
| Boundary + Burst Mode operation | Enables >85% peak efficiency and <100mVpp ripple across 10mA–2.9A load range (24VIN). |
| Accurate EN/UVLO with hysteresis | 1.214V enable threshold ±14mV hysteresis allows robust input brown-in/brown-out control without external comparators. |
| Integrated 3.6A/65V DMOS switch | Reduces external component count vs. controller-only solutions; supports 32VIN flyback with margin for leakage spikes. |
| Output short-circuit protection | Auto-recovery foldback limits power dissipation during sustained shorts-no latch-up or manual reset required. |
| Thermally enhanced SOIC-EP | Exposed GND pad lowers thermal resistance by ~40% vs. standard SOIC-enables 10W operation in compact layouts. |
Applications
| Industrial PLC Auxiliary Supply | Automotive Battery Monitoring Isolation |
|---|---|
Use Scenario: Providing isolated 5V/1.5A bias for analog front-ends and communication interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Primary-side flyback controller regulating isolated output without optocoupler, using boundary mode for dynamic load response. Use Value: Reduces component count by 4 parts (opto + TL431 + resistors) and improves long-term stability versus aging optocouplers. | Use Scenario: Generating isolated 3.3V supply for CAN transceiver and microcontroller in 12V vehicle battery monitoring modules. IC Role / Device Role / Timing Role: Micropower flyback converter operating from 4V–36V input, delivering stable output during cold-crank (4.5V) and load-dump (36V) events. Use Value: Maintains >75% efficiency at 10mA standby current-extending battery life while meeting AEC-Q100 transient immunity requirements. |
| Medical Patient Monitoring Isolation | Industrial Motor Drive Housekeeping |
Use Scenario: Powering isolated ADCs and digital isolators in Class II patient-connected devices requiring reinforced insulation. IC Role / Device Role / Timing Role: No-opto flyback IC providing creepage/clearance-compliant 5V output with <0.5% min load requirement. Use Value: Eliminates optocoupler CMTI limitations and enables <100ns propagation delay for fast fault-response systems. | Use Scenario: Supplying isolated 15V gate drive and 5V logic power for IGBT drivers in variable-frequency motor drives. IC Role / Device Role / Timing Role: High-voltage flyback controller with 65V switch rating, supporting 32V DC bus inputs and transformer leakage spike suppression. Use Value: Enables single-transformer design for dual isolated outputs (15V/5V) with <1% cross-regulation error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28740DR | Requires optocoupler feedback; no integrated high-voltage switch-needs external MOSFET and driver. | Higher BOM count and layout complexity; better suited for >30W designs with tighter output tolerance. | Select when needing <±0.5% output regulation or higher power density with active clamp topology. |
| MAX17690ATP+T | Integrated 65V/3.5A switch; uses valley-switching instead of boundary mode; no TC pin for diode compensation. | Lacks temperature-compensated feedback-requires external circuitry for stable output over –40°C to 125°C. | Choose for cost-sensitive industrial supplies where diode VF drift is mitigated by design margin. |
Compared with UCC28740DR and MAX17690ATP+T, the LT3002ES8E#TRPBF uniquely combines no-opto regulation, integrated DMOS switch, and on-chip temperature compensation-reducing design cycle time for 5–10W isolated supplies requiring long-term reliability and minimal external components.
Availability
LT3002ES8E#TRPBF is available at Aetrix Electronics and suitable for industrial PLC auxiliary supplies, automotive battery monitoring isolation, and medical patient monitoring isolation requiring stable component supply and long-lifecycle support.
Supply support for LT3002ES8E#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 LT3002ES8E#TRPBF belongs to Analog Devices' µModule®-adjacent isolated power controller family, designed specifically for compact, high-reliability flyback converters where optocoupler elimination and thermal efficiency are critical.
FAQ
What is the minimum load requirement for stable regulation with the LT3002ES8E#TRPBF?
The LT3002ES8E#TRPBF typically requires less than 0.5% of full output power as minimum load-approximately 10mA for a 5V/1.5A design. This stems from its need to maintain sufficient switching activity for accurate primary-side voltage sampling. A 500Ω resistor or 5.6V Zener diode can satisfy this requirement if pre-loading is acceptable. The LT3002ES8E#TRPBF datasheet confirms this behavior is inherent to its boundary/Burst Mode architecture and not dependent on external compensation.
Can the LT3002ES8E#TRPBF regulate multiple isolated outputs simultaneously?
The LT3002ES8E#TRPBF regulates only one isolated output directly via RFB/RREF feedback. However, a single transformer with multiple secondary windings can generate additional unregulated or loosely regulated outputs-cross-regulation depends on winding coupling and loading. For tightly regulated multi-output designs, the LT3002ES8E#TRPBF must be paired with post-regulators (e.g., LDOs) on secondary windings. Its no-opto architecture does not support direct multi-output sensing.
How does the TC pin on the LT3002ES8E#TRPBF improve output voltage stability?
The TC pin on the LT3002ES8E#TRPBF delivers a PTAT voltage (3.35mV/°K) used with an external RTC resistor to compensate for the negative temperature coefficient of the output diode's forward voltage. By injecting a proportional current into the RREF node, it counteracts VF drift-reducing output variation from ±15mV to ±5mV over –40°C to 125°C. This function is unique to the LT3002ES8E#TRPBF among comparable isolated controllers and eliminates need for external temperature sensors.
What is the maximum allowable voltage spike on the SW pin of the LT3002ES8E#TRPBF?
The SW pin of the LT3002ES8E#TRPBF is rated for 65V transients per Absolute Maximum Ratings, but operational design must keep flyback voltage spikes below this limit. Due to transformer leakage inductance, the actual safe operating voltage is derated-typically ≤60V. A snubber (e.g., 470pF + 39Ω RC series with 24V Zener) is recommended to clamp spikes. Exceeding 65V risks permanent damage, as confirmed in the LT3002ES8E#TRPBF datasheet Note 2.
Does the LT3002ES8E#TRPBF support synchronous rectification on the secondary side?
The LT3002ES8E#TRPBF does not provide a dedicated gate drive signal for synchronous rectification. It is designed for use with standard Schottky or fast-recovery diodes on the secondary side. While external controllers can add sync rectification, doing so negates the LT3002ES8E#TRPBF's core advantage of simplicity-its no-opto, single-chip solution targets cost- and space-constrained applications where diode losses are acceptable at ≤10W output.
LT3002ES8E#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
LT3002ES8E#TRPBF FAQ
1.How can I place an order for LT3002ES8E#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3002ES8E#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 LT3002ES8E#TRPBF reliable?
The price and inventory of LT3002ES8E#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3002ES8E#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3002ES8E#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3002ES8E#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3002ES8E#TRPBF?
LT3002ES8E#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3002ES8E#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 LT3002ES8E#TRPBF?
For technical support, including LT3002ES8E#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3002ES8E#TRPBF requirements.
6.How does Aetrix verify that LT3002ES8E#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3002ES8E#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 LT3002ES8E#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3002ES8E#TRPBF?
All LT3002ES8E#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3002ES8E#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 LT3002ES8E#TRPBF part is unused and in its original packaging.
Return procedure for LT3002ES8E#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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