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Analog Devices Inc. LT8361IMSE#PBF
- Part No.:
- LT8361IMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LT8361IMSE#PBF.pdf
- Description:
- IC REG BST SEPIC ADJ 2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:997
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Product details
Overview
LT8361IMSE#PBF from Analog Devices is a current-mode DC/DC converter with a 100V, 2A integrated 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#PBF datasheet, LT8361IMSE#PBF pinout, LT8361IMSE#PBF application, or LT8361IMSE#PBF equivalent, key selection factors include its 100V switch rating, programmable 300kHz–2MHz switching frequency, SYNC/MODE pin mode selection (Burst/Pulse-Skip/SSFM), BIAS pin efficiency optimization, and thermally enhanced MSOP-16 package with exposed PGND pad.
Technical Context
The LT8361IMSE#PBF employs fixed-frequency current-mode control with external RT resistor programming and internal slope compensation. Its dual-amplifier FBX architecture enables seamless positive (1.60V reference) or negative (–0.80V reference) output regulation without topology-specific pins.
It integrates UVLO with 1.6V turn-on/1.545V turn-off thresholds, programmable soft-start via SS pin (2µA charge current), and five SYNC/MODE pin configurations-including Burst Mode (≤9µA IQ), pulse-skip, external clock sync, and Spread Spectrum Frequency Modulation (±14–28% deviation) for EMI reduction.
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 high-step-up ratios (e.g., 12V→48V) and robustness against load dump 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 pin; avoids AM radio band and enables compact magnetics |
| Feedback Reference | +1.60V or –0.80V - single FBX pin supports both boost/SEPIC and inverting configurations |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 Grade I |
| Package | 16-lead MSOP with 4 pins removed - thermally enhanced layout with exposed PGND pad (θJC = 10°C/W) |
Pinout & Package
The LT8361IMSE#PBF is housed in a 16-lead plastic 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 continuous PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable / Undervoltage Lockout Input | Logic-controlled shutdown; 1.6V rising threshold enables operation; 80mV hysteresis prevents chatter during brownout |
| VIN | Main Input Supply | Primary power source for switch and internal circuitry; requires local 1µF ceramic bypass near pin |
| INTVCC | Internal 3.8V Regulator Output | Supplies gate drivers and logic; must be bypassed with 1µF ceramic; no external loading permitted |
| BIAS | Secondary Input for INTVCC | Accepts 4.4V–VIN supply to offload INTVCC current from VIN, improving full-load efficiency by ~2–4% |
| VC | Error Amplifier Output | Connects to external RC compensation network; sets loop bandwidth and phase margin |
| FBX | Feedback Input | Single pin accepts voltage divider from VOUT; selects +1.60V (boost/SEPIC) or –0.80V (inverting) regulation reference |
| RT | Frequency Programming | Resistor-to-GND sets fSW from 300kHz to 2MHz; enables EMI optimization and size/cost trade-offs |
| SS | Soft-Start Control | Capacitor-to-GND controls inrush current ramp rate; 2µA internal charge current defines startup time |
| SYNC/MODE | Mode Selection & Clock Sync | Five states: GND = Burst Mode; float = Pulse-Skip; 100k-to-GND = Burst+SSFM; INTVCC = Pulse-Skip+SSFM; external clock = Sync |
| SW | Power Switch Drain | 100V, 2A NMOS drain node; minimal trace area required to reduce EMI and ringing |
| PGND/GND | Power & Signal Ground | Exposed pad (Pin 17) is primary thermal path and low-impedance return for switch current and signal references |
Key Features
| Feature | Design Value |
|---|---|
| Single-FB Topology Flexibility | One resistor-divider network configures boost, SEPIC, or inverting outputs-reduces BOM count and layout variants |
| Burst Mode Efficiency | 9µA IQ at light loads preserves battery energy while maintaining <15mV output ripple-critical for always-on telematics |
| Spread Spectrum Modulation | ±14–28% frequency dithering reduces peak EMI by up to 10dB without filter redesign |
| BIAS Pin Efficiency Boost | Redirects INTVCC current from VIN to a higher-efficiency auxiliary rail (e.g., VOUT in SEPIC), cutting total losses by 0.5–1.2W at 1A |
| AEC-Q100 Qualified | Grade I (–40°C to +125°C) qualification ensures reliability in automotive engine compartments and ADAS ECUs |
Applications
| Automotive Infotainment Power | Industrial Sensor Transmitter |
|---|---|
Use Scenario: Powering LCD backlight and audio amplifier from 12V battery with cold-crank immunity down to 2.8V. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC controller managing boost conversion to 24V with dynamic load step response. Use Value: 100V switch withstands 120V load dump pulses; Burst Mode extends parking-mode runtime beyond 30 days. | Use Scenario: Generating isolated –15V rail for 4–20mA current-loop transmitter in hazardous-area process instrumentation. IC Role / Device Role / Timing Role: Inverting converter delivering negative output from 24V field bus, with programmable UVLO for brownout rejection. Use Value: Single FBX pin simplifies negative-rail design; 2.8V–60V input range accommodates wide industrial supply tolerances. |
| Medical Portable Ultrasound | Telecom Remote Radio Unit |
Use Scenario: High-efficiency 5V→48V SEPIC supply for piezoelectric transducer driver in handheld ultrasound probe. IC Role / Device Role / Timing Role: Wide-input SEPIC controller enabling bidirectional energy transfer and input/output isolation. Use Value: Programmable 300kHz–2MHz fSW allows EMI tuning to avoid RF front-end interference bands. | Use Scenario: 48V telecom rectified input converted to 3.3V/5V for FPGA and RF ICs in outdoor small-cell base stations. IC Role / Device Role / Timing Role: Primary 48V→5V buck-derived converter using BIAS pin tied to intermediate 12V rail for highest efficiency. Use Value: BIAS pin reduces VIN current draw by >60%, lowering thermal stress on upstream rectifiers and PFC stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3780EMSE#PBF | 4-switch synchronous controller; no integrated switch; requires external MOSFETs; supports 4V–36V input | Targeted at high-current (>5A), high-efficiency synchronous designs-not suitable for space-constrained 2A applications | Select only when >3A output current, synchronous rectification, or input <4V is required |
| TPS61088RHLR | Integrated 10V/8A switch; 2.7V–12V input; fixed 500kHz fSW; no SEPIC/inverting support | Optimized for portable USB-PD and display power; lacks high-VIN capability and topology flexibility | Choose only for low-VIN (<12V), high-current boost where 100V rating is unnecessary |
Compared with LTC3780EMSE#PBF and TPS61088RHLR, the LT8361IMSE#PBF uniquely combines 100V integration, triple-topology support, and ultralow 9µA Burst Mode IQ-making it the sole fit for compact, high-reliability 24V/48V automotive and industrial converters needing minimal external components.
Availability
LT8361IMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor transmitters, and medical portable ultrasound devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8361IMSE#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, industrial, automotive, and communications markets.
The LT8361IMSE#PBF belongs to Analog Devices' Power by Linear™ family of monolithic DC/DC converters designed specifically for high-voltage, wide-input industrial and automotive power conversion with minimal external components.
FAQ
What is the maximum input voltage rating for the LT8361IMSE#PBF?
The LT8361IMSE#PBF has an absolute maximum input voltage rating of 60V on the VIN pin and supports continuous operation from 2.8V to 60V. This wide range enables direct connection to 48V industrial buses and 24V automotive systems, including transient-tolerant designs where load dump spikes are clamped externally. The 100V-rated internal switch provides margin for voltage overshoots without requiring additional protection circuitry.
How does the LT8361IMSE#PBF achieve 9µA quiescent current?
The LT8361IMSE#PBF achieves 9µA quiescent current in Burst Mode by entering deep sleep cycles between short, controlled energy bursts delivered to the output capacitor. During sleep, most internal circuitry-including the oscillator and gate drivers-is disabled, leaving only essential bias currents active. This architecture maintains regulation while minimizing average input current, making the LT8361IMSE#PBF ideal for battery-backed systems where multi-year standby life is critical.
Can the LT8361IMSE#PBF generate a negative output voltage?
Yes, the LT8361IMSE#PBF can generate a negative output voltage using its inverting configuration. By connecting the FBX pin to a resistor divider referenced to the output (VOUT) and system ground, the internal –0.80V reference engages amplifier A2, enabling stable negative regulation. This eliminates the need for separate inverting controller ICs and reduces bill-of-materials cost in applications such as op-amp bias supplies and sensor signal conditioning stages.
What is the purpose of the BIAS pin on the LT8361IMSE#PBF?
The BIAS pin on the LT8361IMSE#PBF supplies the INTVCC regulator independently from VIN when a valid 4.4V–VIN auxiliary voltage is present. This reduces VIN current draw by up to 90% under full load, directly improving system efficiency-especially in SEPIC topologies where VOUT may exceed VIN. For example, in a 24V→24V SEPIC, tying BIAS to VOUT cuts total power loss by 0.8W at 1A output, lowering thermal stress on the LT8361IMSE#PBF and upstream components.
Is the LT8361IMSE#PBF pin-compatible with other variants in the LT8361 family?
Yes, the LT8361IMSE#PBF shares identical pinout, footprint, and electrical interface with all LT8361 variants-including LT8361EMSE#PBF (commercial temp), LT8361HMSE#PBF (high-temp), and automotive-grade LT8361IMSE#WPBF. All use the same 16-lead MSOP package with pins 3, 4, 13, and 15 removed, and identical exposed PGND pad layout. This allows drop-in replacement across temperature grades without PCB revision, simplifying qualification and inventory management.
LT8361IMSE#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
LT8361IMSE#PBF FAQ
1.How can I place an order for LT8361IMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8361IMSE#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 LT8361IMSE#PBF reliable?
The price and inventory of LT8361IMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8361IMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8361IMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8361IMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8361IMSE#PBF?
LT8361IMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8361IMSE#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 LT8361IMSE#PBF?
For technical support, including LT8361IMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8361IMSE#PBF requirements.
6.How does Aetrix verify that LT8361IMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8361IMSE#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 LT8361IMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8361IMSE#PBF?
All LT8361IMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8361IMSE#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 LT8361IMSE#PBF part is unused and in its original packaging.
Return procedure for LT8361IMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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