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Analog Devices Inc. LT8361EMSE#PBF
- Part No.:
- LT8361EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LT8361EMSE#PBF.pdf
- Description:
- IC REG BST SEPIC ADJ 2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,838
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Product details
Overview
LT8361EMSE#PBF 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-enabling compact, high-efficiency power supplies for automotive infotainment head units.
For engineers reviewing the LT8361EMSE#PBF datasheet, LT8361EMSE#PBF pinout, LT8361EMSE#PBF application, or LT8361EMSE#PBF equivalent, key selection considerations include its 100V switch rating, programmable 300kHz–2MHz switching frequency, SYNC/MODE pin configurable operation modes (Burst, pulse-skip, SSFM), BIAS pin for efficiency optimization, and thermally enhanced 16-lead MSOP package with exposed PGND pad.
Technical Context
The LT8361EMSE#PBF employs fixed-frequency current-mode control with external RT-resistor programmability and dual error amplifiers enabling topology-agnostic regulation: +1.60V reference for positive outputs (boost/SEPIC) and –0.80V reference for negative outputs (inverting). Its unique single FBX architecture eliminates need for topology-specific feedback networks.
It integrates frequency foldback, programmable soft-start (2µA charge current), UVLO with 80mV hysteresis (1.576V rising / 1.545V falling), and thermal shutdown at >170°C. The SYNC/MODE pin selects five distinct operational states-including Burst Mode (9µA IQ), pulse-skip, external clock synchronization, and Spread Spectrum Frequency Modulation-without requiring external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 60V - supports wide-range industrial and automotive battery inputs including 12V, 24V, and 48V systems. |
| Switch Rating | 100V, 2A - enables high-voltage boost and SEPIC designs without external MOSFETs, reducing BOM count and layout area. |
| Quiescent Current | 9µA in Burst Mode - sustains ultra-low standby power in always-on systems like telematics or ECU wake-up circuits. |
| Switching Frequency | 300kHz to 2MHz (RT-programmable) - allows optimization between EMI performance (lower fSW) and component size (higher fSW). |
| Feedback Reference | +1.60V (positive VOUT) or –0.80V (negative VOUT) - single FBX pin supports three topologies without hardware reconfiguration. |
| Package Thermal Resistance | θJA = 45°C/W, θJC = 10°C/W - exposed PGND pad enables direct thermal coupling to PCB ground plane for reliable 2A continuous operation. |
| Operating Junction Temp | –40°C to +125°C - qualified for extended-temperature industrial and AEC-Q100-compliant automotive applications. |
Pinout & Package
The LT8361EMSE#PBF is housed in a thermally enhanced 16-lead MSOP package (MSE16 variation) with four pins removed (pins 2, 4, 13, 15) to ensure high-voltage spacing. The exposed pad (Pin 17) is electrically connected to PGND/GND and must be soldered to a solid copper ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable and undervoltage lockout input | Programmable turn-on/off thresholds (1.576V rising / 1.545V falling) enable system-level brownout protection and controlled startup sequencing. |
| VIN | Main input supply rail | Accepts 2.8V–60V; powers internal circuitry unless BIAS pin is active; requires local low-ESR bypass capacitor near exposed PGND. |
| BIAS | Secondary input for INTVCC regulator | Supplies INTVCC when 4.4V ≤ BIAS ≤ VIN, diverting up to ~1.2mA from VIN to improve full-load efficiency by ~1–2%. |
| FBX | Topology-agnostic feedback input | Accepts either +1.60V (for boost/SEPIC) or –0.80V (for inverting) reference; regulates output regardless of polarity or configuration. |
| SYNC/MODE | Multi-function control pin | Selects Burst Mode (GND), pulse-skip (open), SSFM (INTVCC), sync (external clock), or Burst+SSFM (100k to GND) - no external logic required. |
| SW1/SW2 | Internal power switch output | 100V, 2A drain-source terminals; minimized trace area reduces EMI; connects directly to inductor/diode node in all topologies. |
| PGND/GND | Power and signal ground | Exposed pad (Pin 17) is primary thermal path and low-impedance return for switch current; must be soldered to large PCB copper area. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode Operation | 9µA IQ with <15mV output ripple - extends battery life in portable medical monitors and IoT edge sensors without compromising noise-sensitive analog rails. |
| Single-Pin Topology Flexibility | One FBX pin configures boost, SEPIC, or inverting outputs - eliminates board revisions when changing output polarity or architecture during design iteration. |
| Spread Spectrum Frequency Modulation | ±14–28% frequency deviation at fOSC/256 rate - reduces peak EMI by >10dB in CISPR 25 Class 5 automotive EMC testing without added filtering. |
| Programmable Soft-Start | 2µA constant-current ramp into SS pin - controls inrush current and prevents output overshoot during cold-start in engine control modules. |
| Thermal Enhancement | Exposed PGND pad with θJC = 10°C/W - enables 2A continuous conduction mode operation at +85°C ambient without derating in sealed enclosures. |
Applications
| Automotive Infotainment | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Powering 5V/3.3V rails for display controllers and audio codecs in vehicle head units with 9–16V battery input. IC Role / Device Role / Timing Role: Primary DC/DC controller implementing SEPIC topology to maintain regulation during cold-crank (4.5V) and load-dump (40V) transients. Use Value: 100V switch withstands load-dump surges without clamping diodes; Burst Mode preserves battery during parking mode. |
Use Scenario: Generating isolated ±15V rails for 4–20mA loop-powered pressure/temperature transmitters in hazardous-area process plants. IC Role / Device Role / Timing Role: Inverting converter producing negative output from 24V loop supply, with BIAS pin fed from local 12V auxiliary rail. Use Value: Single FBX pin simplifies feedback network; 2.8V min input ensures operation during brownouts; 125°C rating suits high-ambient cabinets. |
| Portable Medical Diagnostics | Telecom Remote Radio Units |
|
Use Scenario: Supplying 24V bias for ultrasound transducer arrays and 3.3V logic for FPGA-based beamformers in handheld imaging devices. IC Role / Device Role / Timing Role: Dual-output boost converter (24V main, 3.3V auxiliary via LDO) powered from Li-ion battery (3.0–4.2V). Use Value: 9µA IQ extends battery runtime in standby; programmable fSW allows EMI tuning to avoid RF front-end interference bands. |
Use Scenario: Providing 48V PoE-compatible output from 24V backup battery in outdoor small-cell base stations during AC failure. IC Role / Device Role / Timing Role: High-efficiency boost converter with SYNC pin locked to system clock to suppress beat frequencies in RF DAC/ADC clocks. Use Value: Synchronization eliminates spurious tones in LTE/5G transmit spectra; 60V max input accommodates wide-range battery chemistries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3789EMSE#PBF | Requires external MOSFETs; supports up to 60V input but no integrated 100V switch; higher IQ (25µA) | Used where higher output power (>50W) or synchronous rectification is needed; not suitable for space-constrained 100V boost designs | Select LTC3789EMSE#PBF only when discrete FETs are preferred for thermal management or voltage scaling beyond 100V. |
| MAX20096ATPA/VY+ | Integrated 75V/3.5A switch; lower max input (42V); AEC-Q100 Grade 0 (–40°C to +150°C); no inverting mode support | Targeted at automotive ADAS cameras and radar; lacks FBX polarity flexibility and SSFM capability | Choose MAX20096ATPA/VY+ for cost-sensitive automotive vision systems needing higher current but accepting topology limitation. |
Compared with LTC3789EMSE#PBF and MAX20096ATPA/VY+, the LT8361EMSE#PBF uniquely combines 100V integration, single-pin topology selection, and sub-10µA Burst Mode-making it optimal for compact, multi-rail, high-voltage industrial and automotive power supplies where layout area and standby power are critical.
Availability
LT8361EMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor transmitters, portable medical diagnostics, telecom remote radio units, and medical imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8361EMSE#PBF 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, communications, and healthcare markets.
The LT8361EMSE#PBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters designed for high-voltage, wide-input industrial and automotive power conversion where reliability, efficiency, and topology flexibility are essential.
FAQ
What is the maximum input voltage the LT8361EMSE#PBF can handle?
The LT8361EMSE#PBF has an absolute maximum input voltage rating of 60V on the VIN pin, with guaranteed operation across 2.8V to 60V. This allows direct connection to 48V industrial buses and automotive systems experiencing load-dump transients up to 60V. Exceeding 60V risks permanent damage per Absolute Maximum Ratings.
How does the LT8361EMSE#PBF achieve ultralow 9µA quiescent current?
The LT8361EMSE#PBF achieves 9µA IQ in Burst Mode by entering deep sleep between short current pulses-only powering essential bias circuitry while the output capacitor supplies load current. This occurs when the SYNC/MODE pin is pulled below 0.14V, and is validated across –40°C to +125°C junction temperature.
Can the LT8361EMSE#PBF generate both positive and negative output voltages?
Yes, the LT8361EMSE#PBF supports both polarities using its single FBX pin: +1.60V reference for boost/SEPIC (positive VOUT) and –0.80V reference for inverting configurations (negative VOUT). No external component changes are needed-only the resistor divider connection differs per topology.
What is the purpose of the BIAS pin on the LT8361EMSE#PBF?
The BIAS pin on the LT8361EMSE#PBF supplies the INTVCC regulator when 4.4V ≤ BIAS ≤ VIN, reducing VIN current draw by ~1.2mA and improving full-load efficiency by up to 2%. In SEPIC designs where VOUT ≈ VIN, connecting BIAS to VOUT is a common implementation.
Is the LT8361EMSE#PBF pin-compatible with other variants in the LT8361 family?
Yes, the LT8361EMSE#PBF shares identical pinout and footprint with LT8361IMSE#PBF and LT8361HMSE#PBF-all use the same 16-lead MSOP package with four pins removed and exposed PGND pad. Only temperature grade (E: –40°C to +125°C) and qualification (H: +150°C, automotive W-suffix) differ.
LT8361EMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Packaging:
- Tube
- 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
LT8361EMSE#PBF FAQ
1.How can I place an order for LT8361EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8361EMSE#PBF 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 LT8361EMSE#PBF reliable?
The price and inventory of LT8361EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8361EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8361EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8361EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8361EMSE#PBF?
LT8361EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8361EMSE#PBF 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 LT8361EMSE#PBF?
For technical support, including LT8361EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8361EMSE#PBF requirements.
6.How does Aetrix verify that LT8361EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8361EMSE#PBF 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 LT8361EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8361EMSE#PBF?
All LT8361EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8361EMSE#PBF, 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 LT8361EMSE#PBF part is unused and in its original packaging.
Return procedure for LT8361EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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