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Analog Devices Inc. LT8361HMSE#TRPBF
- Part No.:
- LT8361HMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LT8361HMSE#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,051
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Product details
Overview
LT8361HMSE#TRPBF from Analog Devices is a high-voltage, 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 LT8361HMSE#TRPBF datasheet, LT8361HMSE#TRPBF pinout, LT8361HMSE#TRPBF application, or LT8361HMSE#TRPBF equivalent, key selection criteria include its AEC-Q100 qualification, –40°C to 150°C junction temperature rating, programmable 300kHz–2MHz switching frequency, BIAS pin for efficiency optimization, and SYNC/MODE pin for EMI-reducing spread-spectrum modulation.
Technical Context
The LT8361HMSE#TRPBF implements fixed-frequency current-mode control with external RT-resistor programmability and dual error amplifier topology (1.60V for positive outputs, –0.80V for negative outputs) enabling single-pin output polarity selection. Its internal 3.8V INTVCC regulator can be powered from either VIN or BIAS (4.4V–VIN), reducing input supply current under light loads.
Burst Mode operation uses sleep cycles with 9µA IQ while delivering microsecond-scale current pulses; pulse-skipping and SSFM modes are selectable via SYNC/MODE voltage thresholds (0.14V, 1.7V, or external clock). Overcurrent protection triggers at 3.75A switch discharge and includes frequency foldback and thermal shutdown above 170°C.
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 SEPIC or 48V boost outputs with margin for transients |
| Quiescent Current | 9µA in Burst Mode - sustains >10-year battery life in always-on vehicle modules |
| Switching Frequency | 300kHz to 2MHz - adjustable via RT resistor; avoids AM radio band and enables compact magnetics |
| Output Polarity | Positive or negative via single FBX pin - eliminates need for separate inverting/boost controllers |
| Junction Temp Range | –40°C to 150°C - qualified per AEC-Q100 Grade H for under-hood automotive use |
| Package Thermal RθJA | 45°C/W - requires exposed pad soldered to PCB ground plane for thermal reliability |
Pinout & Package
LT8361HMSE#TRPBF is housed in a thermally enhanced 16-lead MSOP package (MSE16 variation) with pins 3, 4, 13, and 15 removed to ensure high-voltage spacing between SW and GND/BIAS. The exposed pad (Pin 17) is PGND/GND and must be soldered to a continuous copper ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable and undervoltage lockout input | 1.6V rising threshold with 80mV hysteresis; ties directly to VIN for always-on operation or to resistor divider for programmable turn-on voltage |
| VIN | Main input supply | Accepts 2.8V–60V; local 10µF ceramic bypass required near pin; supplies INTVCC unless BIAS is active |
| INTVCC | Internal 3.8V regulator output | Must be bypassed with 1µF ceramic to GND; no external loading permitted |
| BIAS | Secondary input for INTVCC | Enables higher efficiency when 4.4V ≤ BIAS ≤ VIN; e.g., connect to VOUT in SEPIC to offload VIN current |
| VC | Error amplifier output | Connects to external compensation network (R-C series to GND); sets loop bandwidth and stability |
| FBX | Feedback input | 1.60V reference for positive outputs, –0.80V for negative outputs; single pin selects topology and regulates output voltage |
| RT | Frequency programming | Resistor to GND sets fSW from 300kHz to 2MHz; formula: RT(kΩ) = 51.2/fOSC(MHz) – 5.6 |
| SS | Soft-start control | 2µA constant-current charge; capacitor to GND controls inductor current ramp rate during startup |
| SYNC/MODE | Mode selection and synchronization | Five configurations: GND = Burst Mode; float = pulse-skip; 100k-to-GND = Burst+SSFM; INTVCC = pulse-skip+SSFM; external clock = sync+pulse-skip |
| SW1/SW2 | Power switch output | 100V/2A NMOS drain-source terminals; minimize trace area to reduce EMI |
| PGND/GND | Power and signal ground | Exposed pad (Pin 17) is primary thermal path; route power grounds near EN/UVLO/SW, signal grounds near VC/FBX |
Key Features
| Feature | Design Value |
|---|---|
| Single FBX pin topology selection | Eliminates need for separate boost/inverting ICs-reduces BOM count and layout complexity in multi-rail systems |
| Burst Mode with 9µA IQ | Extends battery runtime in always-on automotive modules (e.g., telematics, ADAS sensors) without compromising output ripple |
| BIAS pin for INTVCC sourcing | Reduces VIN current by >90% in SEPIC configurations where VOUT < VIN, improving full-load efficiency by up to 3% |
| Spread Spectrum Frequency Modulation | Lowers peak EMI by >10dB across 150kHz–1GHz range-meets CISPR 25 Class 5 without added shielding or filtering |
| AEC-Q100 Grade H qualification | Validated for –40°C to 150°C operation with lifetime reliability data-enables direct placement in engine control units and transmission modules |
Applications
| Automotive Infotainment Power | Industrial Sensor Transmitter |
|---|---|
Use Scenario: Generating stable 24V rail from 12V vehicle battery for LCD displays and audio amplifiers, surviving cold-crank (4.5V) and load-dump (60V) events. IC Role / Device Role / Timing Role: Primary DC/DC controller implementing SEPIC topology to maintain regulation across wide input transients. Use Value: 100V switch rating and 60V absolute max VIN withstand capability prevent failure during load dump; Burst Mode extends display module standby time. | Use Scenario: Providing isolated ±15V analog sensor excitation from 24V industrial PLC backplane, with low EMI in dense I/O card stacks. IC Role / Device Role / Timing Role: Inverting converter generating negative rail; SSFM mode reduces conducted emissions into adjacent 4–20mA current loops. Use Value: Single FBX pin simplifies design of dual-polarity supplies; programmable frequency avoids interference with 1kHz PWM motor control signals. |
| Medical Portable Imaging | Telecom Remote Radio Unit |
Use Scenario: Powering CCD/CMOS image sensors and analog front-ends in handheld ultrasound devices using single-cell Li-ion (3.0–4.2V) input. IC Role / Device Role / Timing Role: Boost converter stepping up battery voltage to 5V/12V rails; soft-start prevents inrush current tripping battery protection ICs. Use Value: 2.8V minimum VIN enables full battery utilization; 9µA IQ preserves diagnostic mode battery life over weeks of storage. | Use Scenario: Generating 28V bias for GaN power amplifiers in 5G small cells powered from 48V PoE++ infrastructure. IC Role / Device Role / Timing Role: High-efficiency boost converter with BIAS pin connected to auxiliary 12V rail to reduce main 48V supply loading. Use Value: Dual-input capability improves system-level efficiency by 2.1% at 10W output; 2MHz switching enables <10mm² inductor footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3789EMSE#TRPBF | Requires external MOSFETs; supports up to 60V input but lacks integrated 100V switch | Better suited for high-current (>5A) synchronous buck-boost designs where efficiency >95% is critical | Select LTC3789EMSE#TRPBF only when discrete FETs are preferred for thermal management or when >2A output current is required |
| MAX20404ATPA/VY+ | Integrated 60V/4A switch; fixed 2.1MHz frequency; no SEPIC/inverting support | Optimized for space-constrained automotive camera modules needing fast transient response and ASIL-B compliance | Choose MAX20404ATPA/VY+ for compact 5V/3.3V point-of-load conversion where topology flexibility is not needed |
Compared with LTC3789EMSE#TRPBF and MAX20404ATPA/VY+, the LT8361HMSE#TRPBF uniquely combines 100V integration, single-pin topology selection, and AEC-Q100 Grade H rating-making it the only drop-in solution for 24V SEPIC automotive power supplies requiring both high-voltage robustness and ultra-low IQ.
Availability
LT8361HMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor transmitters, medical portable imaging, and telecom remote radio units requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LT8361HMSE#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 precision instrumentation, industrial automation, and automotive safety markets.
The LT8361 product line delivers high-voltage, low-quiescent-current DC/DC controllers for harsh-environment applications-including engine control, battery management, and ADAS subsystems-where wide input range and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum junction temperature rating for LT8361HMSE#TRPBF?
The LT8361HMSE#TRPBF is rated for operation from –40°C to 150°C junction temperature and is AEC-Q100 qualified for automotive Grade H applications. This specification is guaranteed over the full temperature range, unlike the E/I grades which are limited to 125°C. Thermal derating begins above 125°C ambient depending on PCB copper area and airflow.
How does the BIAS pin improve efficiency in LT8361HMSE#TRPBF designs?
The BIAS pin on the LT8361HMSE#TRPBF allows the internal 3.8V INTVCC regulator to draw current from a secondary supply (4.4V ≤ BIAS ≤ VIN) instead of VIN. In SEPIC applications where VOUT < VIN, connecting BIAS to VOUT reduces VIN supply current by >90%, increasing full-load efficiency by up to 3% and lowering thermal stress on the input stage.
Can LT8361HMSE#TRPBF generate negative output voltages?
Yes, the LT8361HMSE#TRPBF supports inverting converter configurations using the same FBX feedback pin. When the FBX pin is pulled to –0.80V via a resistor divider from the negative output rail, the internal error amplifier A2 activates to regulate negative output voltage-enabling single-IC generation of ±15V rails without additional controllers.
What is the minimum on-time specification for LT8361HMSE#TRPBF at 24V input?
At VIN = 24V, the LT8361HMSE#TRPBF has a typical minimum on-time of 70ns in Burst Mode and 95ns in Pulse-Skip Mode. This enables high step-up ratios (e.g., 24V to 48V at 2MHz) while maintaining stable operation in discontinuous conduction mode, avoiding sub-harmonic oscillation without slope compensation.
How is spread spectrum frequency modulation enabled on LT8361HMSE#TRPBF?
Spread spectrum frequency modulation (SSFM) on the LT8361HMSE#TRPBF is activated by pulling the SYNC/MODE pin to INTVCC (or >1.7V) for pulse-skip+SSFM mode, or by connecting a 100kΩ resistor from SYNC/MODE to GND for Burst+SSFM mode. SSFM modulates the switching frequency by ±10% at fOSC/256, reducing EMI peaks by >10dB across the 150kHz–1GHz band.
LT8361HMSE#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8361HMSE#TRPBF FAQ
1.How can I place an order for LT8361HMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8361HMSE#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 LT8361HMSE#TRPBF reliable?
The price and inventory of LT8361HMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8361HMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8361HMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8361HMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8361HMSE#TRPBF?
LT8361HMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8361HMSE#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 LT8361HMSE#TRPBF?
For technical support, including LT8361HMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8361HMSE#TRPBF requirements.
6.How does Aetrix verify that LT8361HMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8361HMSE#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 LT8361HMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8361HMSE#TRPBF?
All LT8361HMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8361HMSE#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 LT8361HMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8361HMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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