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Analog Devices Inc. LT8361IMSE#TRPBF
- Part No.:
- LT8361IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LT8361IMSE#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
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Product details
Overview
LT8361IMSE#TRPBF from Analog Devices is a current-mode DC/DC converter IC with a 100V, 2A integrated power switch, operating from 2.8V to 60V input. It supports boost, SEPIC, and inverting topologies via a single FBX feedback pin, delivers ≤9µA quiescent current in Burst Mode, and maintains <15mV output ripple-ideal for automotive infotainment power rails requiring wide VIN and low standby loss.
For engineers reviewing the LT8361IMSE#TRPBF datasheet, LT8361IMSE#TRPBF pinout, LT8361IMSE#TRPBF application, or LT8361IMSE#TRPBF equivalent, key selection criteria include its 300kHz–2MHz programmable switching frequency, SYNC/MODE pin-configurable operation modes (Burst, pulse-skip, SSFM), BIAS pin for efficiency optimization, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LT8361IMSE#TRPBF implements fixed-frequency current-mode control with external RT-resistor-programmable oscillator (300kHz–2MHz) and dual error amplifiers enabling topology-agnostic regulation: +1.60V reference for positive outputs (boost/SEPIC), –0.80V reference for negative outputs (inverting). Its unique single-FBX architecture eliminates topology-specific feedback networks.
Protection logic includes programmable UVLO via EN/UVLO pin (1.576V rising, 1.545V falling threshold), thermal shutdown (>170°C), overcurrent detection (3.75A switch trip), and frequency foldback during startup/faults. The BIAS pin dynamically sources INTVCC when 4.4V ≤ BIAS ≤ VIN, reducing VIN load and improving full-load efficiency by up to 3% in SEPIC configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 60V - supports 12V/24V/48V automotive and industrial bus inputs without pre-regulation |
| Switch Rating | 100V, 2A - enables 24V→48V boost or 48V→–24V inverting conversion with margin |
| Quiescent Current | 9µA in Burst Mode - sustains >1000h battery runtime in always-on telematics modules |
| Feedback Reference | +1.60V or –0.80V - single FBX pin configures polarity without external op-amps or level shifters |
| Switching Frequency | 300kHz to 2MHz - RT resistor sets frequency; allows EMI-sensitive designs to avoid AM/FM bands |
| Operating Temp | –40°C to +125°C - qualified per AEC-Q100 Grade I, suitable for under-hood ECUs |
| Package | 16-lead MSOP with 4 pins removed - thermally enhanced layout with exposed PGND pad (θJC = 10°C/W) |
Pinout & Package
LT8361IMSE#TRPBF uses a 16-lead MSOP package with pins 3, 4, 13, and 15 removed to ensure high-voltage spacing between SW and adjacent terminals. The exposed pad (Pin 17) is electrically connected to PGND/GND and must be soldered to a solid PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable and undervoltage lockout input | Resistive divider programs turn-on/off thresholds (1.6V/1.68V); <0.2V reduces VIN current to <1µA |
| VIN | Main input supply | Bypassed locally to exposed PGND; supplies INTVCC unless BIAS is active |
| SW1/SW2 | Power switch drain terminals | Connected internally to 100V/2A MOSFET; minimize trace area to reduce EMI radiation |
| FBX | Topology-agnostic feedback input | Accepts +1.60V (boost/SEPIC) or –0.80V (inverting) reference; regulates output without polarity switches |
| BIAS | Secondary supply for INTVCC | When 4.4V ≤ BIAS ≤ VIN, powers internal regulator to reduce VIN loading and improve efficiency |
| SYNC/MODE | Multi-function control pin | Selects Burst Mode (<0.14V), pulse-skip (float), SSFM (>1.7V), or external sync (square wave) |
| SS | Soft-start timing node | 2µA constant-current charge; capacitor value sets inductor current ramp rate during startup |
| PGND/GND | Power and signal ground | Exposed pad (Pin 17) is primary thermal path; connect to continuous copper plane for θJA = 45°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Single-pin topology selection | FBX pin auto-detects +1.60V or –0.80V reference to configure boost/SEPIC/inverting without external components |
| Ultra-low IQ Burst Mode | 9µA quiescent current maintains regulation while minimizing battery drain in always-on systems |
| Spread Spectrum FM | 20% frequency deviation at fOSC/256 reduces peak EMI by >10dB without filter redesign |
| Programmable UVLO | EN/UVLO pin with 80mV hysteresis enables precise system-level brownout protection |
| Thermal enhancement | Exposed PGND pad and θJC = 10°C/W enable 2A switching at 125°C ambient without derating |
Applications
| Automotive Infotainment Power | Industrial Sensor Signal Chain |
|---|---|
Use Scenario: Powering 5V/3.3V rails for display controllers and audio codecs in head units with 9V–16V battery input. IC Role / Device Role / Timing Role: Primary DC/DC controller generating stable outputs from unregulated vehicle battery with cold-crank tolerance. Use Value: 2.8V start-up and 60V absolute max rating withstand load-dump transients; Burst Mode extends parking-mode battery life. | Use Scenario: Isolated ±15V supplies for precision ADC drivers and op-amp front-ends in factory automation I/O modules. IC Role / Device Role / Timing Role: Inverting converter generating clean negative rail from shared 24V system bus. Use Value: Single FBX pin simplifies design vs dual-supply controllers; <15mV ripple ensures <16-bit ADC SNR performance. |
| Telecom Remote Radio Unit | Portable Medical Imaging |
Use Scenario: 48V-to-12V SEPIC conversion for baseband processing in 5G small cells with PoE-derived input. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter supporting dynamic load steps up to 3A. Use Value: 2A switch and programmable frequency allow compact 12µH inductor; SSFM meets EN55032 Class B radiated emissions. | Use Scenario: Battery-powered ultrasound probe requiring 3.3V, 5V, and –5V rails from single Li-ion cell (2.7V–4.2V). IC Role / Device Role / Timing Role: Boost + inverting configuration delivering multiple regulated outputs from low-VIN source. Use Value: 2.8V minimum VIN enables full battery range utilization; 9µA IQ extends probe operational time beyond 8 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8362IMSE#TRPBF | Same pinout, 3.3A switch, higher current capability but 120µA typical IQ in Burst Mode | Better suited for >1.5A continuous loads; less optimal for ultra-low-power battery systems | Select LT8362IMSE#TRPBF only if output current exceeds 1.2A and IQ penalty is acceptable |
| TPS61088RHLR | 12V max switch, 4.5A switch, no inverting/SEPIC support, fixed 500kHz/1MHz frequencies | Limited to boost-only; lacks AEC-Q100 qualification and programmable frequency | Choose TPS61088RHLR for cost-sensitive consumer boost applications where topology flexibility and automotive compliance are not required |
Compared with LT8361IMSE#TRPBF, LT8362IMSE#TRPBF offers higher current headroom at the expense of quiescent current, while TPS61088RHLR provides lower cost and higher peak current but sacrifices topology versatility, EMI control, and automotive qualification.
Availability
LT8361IMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor signal chains, and portable medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8361IMSE#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 with precision power, signal conditioning, and RF solutions.
The LT8361IMSE#TRPBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters designed specifically for high-reliability, wide-input automotive and industrial power conversion where topology flexibility, low IQ, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum input voltage the LT8361IMSE#TRPBF can safely handle?
The LT8361IMSE#TRPBF has an absolute maximum input voltage rating of 60V on the VIN and EN/UVLO pins. Operation above this level risks permanent damage. Its guaranteed operating range is 2.8V to 60V, making it suitable for 48V automotive systems and industrial 36V+ buses. Always observe the 60V limit even during transient events unless external clamping is implemented.
How does the LT8361IMSE#TRPBF achieve ultralow 9µA quiescent current?
The LT8361IMSE#TRPBF achieves 9µA quiescent current in Burst Mode by entering deep sleep between output energy pulses-only powering essential bias circuits while the output capacitor sustains load. This mode activates automatically when the SYNC/MODE pin is pulled below 0.14V. The 9µA figure is measured at VIN = 12V, no load, and excludes FBX divider current, which must be minimized separately for true system-level low-IQ performance.
Can the LT8361IMSE#TRPBF generate both positive and negative output voltages?
Yes, the LT8361IMSE#TRPBF supports both polarities using its single FBX pin: +1.60V reference enables boost or SEPIC for positive outputs; –0.80V reference enables inverting configurations for negative outputs. No external level-shifting circuitry is needed-the internal error amplifier topology auto-selects based on FBX voltage polarity, simplifying design across multiple rail requirements.
What is the purpose of the BIAS pin on the LT8361IMSE#TRPBF?
The BIAS pin on the LT8361IMSE#TRPBF supplies the internal INTVCC regulator when 4.4V ≤ BIAS ≤ VIN, diverting up to 90% of INTVCC current away from VIN. This improves full-load efficiency-especially in SEPIC designs where VOUT ≈ VIN-and reduces thermal stress on the input stage. If unused, BIAS must be tied to GND; floating it may cause undefined behavior.
Is the LT8361IMSE#TRPBF qualified for automotive applications?
Yes, the LT8361IMSE#TRPBF is AEC-Q100 qualified for Grade I (–40°C to +125°C junction temperature) and manufactured under automotive quality standards. Its datasheet specifies guaranteed performance across this range, including EN/UVLO thresholds, FBX regulation, and switching frequency stability-making it suitable for engine control, ADAS, and infotainment systems without additional qualification testing.
LT8361IMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- 100V (Switch)
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8361IMSE#TRPBF FAQ
1.How can I place an order for LT8361IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8361IMSE#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 LT8361IMSE#TRPBF reliable?
The price and inventory of LT8361IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8361IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8361IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8361IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8361IMSE#TRPBF?
LT8361IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8361IMSE#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 LT8361IMSE#TRPBF?
For technical support, including LT8361IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8361IMSE#TRPBF requirements.
6.How does Aetrix verify that LT8361IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8361IMSE#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 LT8361IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8361IMSE#TRPBF?
All LT8361IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8361IMSE#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 LT8361IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8361IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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