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Analog Devices Inc. LT8361EMSE#TRPBF
- Part No.:
- LT8361EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LT8361EMSE#TRPBF.pdf
- Description:
- IC REG BST SEPIC ADJ 2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:730
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Product details
Overview
LT8361EMSE#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 features programmable switching frequency (300kHz–2MHz) for telecom power supplies and industrial battery-powered systems.
For engineers reviewing the LT8361EMSE#TRPBF datasheet, LT8361EMSE#TRPBF pinout, LT8361EMSE#TRPBF application, or LT8361EMSE#TRPBF equivalent, key selection considerations include its 100V switch rating, dual-mode (Burst/Pulse-Skip) operation via SYNC/MODE pin, BIAS pin for efficiency optimization, ±4V FBX input range, and thermally enhanced 16-lead MSOP package with exposed PGND pad.
Technical Context
The LT8361EMSE#TRPBF implements fixed-frequency current-mode control with external RT resistor programming and internal slope compensation. Its dual-error-amplifier architecture enables seamless topology reconfiguration-A1 active for positive outputs (1.6V reference), A2 active for negative outputs (–0.8V reference)-without hardware changes.
Switching behavior is dynamically managed through the SYNC/MODE pin: ground or <0.14V selects Burst Mode (9µA IQ); floating enables Pulse-Skip; 100k-to-GND adds Spread Spectrum Frequency Modulation (SSFM); INTVCC or >1.7V enables Pulse-Skip + SSFM; external clock synchronizes switching while disabling Burst Mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 60V - supports wide-range industrial, automotive, and telecom inputs without pre-regulation |
| Switch Rating | 100V, 2A - enables high-voltage boost and SEPIC designs up to 48V output with margin |
| Quiescent Current | 9µA in Burst Mode - sustains ultra-low-power operation in battery-backed or energy-harvesting systems |
| Switching Frequency | 300kHz to 2MHz - adjustable via RT resistor; allows EMI optimization and compact magnetics selection |
| Feedback Reference | +1.60V or –0.80V - single FBX pin supports both positive and negative output configurations |
| BIAS Pin Function | Accepts 4.4V–VIN supply - offloads INTVCC regulator from VIN, improving full-load efficiency by reducing input current draw |
| Operating Temp Range | –40°C to +125°C - qualified for extended industrial and automotive under-hood applications |
Pinout & Package
The LT8361EMSE#TRPBF 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 continuous PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable / Undervoltage Lockout Input | Logic-controlled shutdown; 1.6V rising threshold with 80mV hysteresis enables precise system-level input voltage monitoring |
| VIN | Main Input Supply | Primary power source for switch and internal circuitry; requires local low-ESR ceramic bypass near PGND |
| INTVCC | Internal 3.8V Regulator Output | Supplies gate drivers and logic; must be bypassed with ≥1µF ceramic capacitor; not externally loaded |
| BIAS | Secondary Input for INTVCC | When 4.4V ≤ BIAS ≤ VIN, powers INTVCC to reduce VIN current and improve efficiency |
| VC | Error Amplifier Output | Connects to external compensation network (R-C-RC) for loop stability across wide VIN/VOUT ranges |
| FBX | Feedback Input | Single pin accepts voltage divider from output; regulates to +1.60V (boost/SEPIC) or –0.80V (inverting) |
| 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 | Capacitor to GND controls inductor current ramp rate; 2µA charge current enables predictable startup |
| SYNC/MODE | Mode Selection & Clock Sync | Five configurations: Burst, Pulse-Skip, Sync, SSFM, or hybrid - selected by voltage/resistor tie-off |
| SW1/SW2 | Power Switch Output | Drives external inductor/diode; minimized trace area reduces EMI; rated 100V, 2A, 375mΩ RDS(ON) |
| 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 feedback pin supports boost, SEPIC, and inverting configurations - eliminates need for multiple IC variants or external reconfiguration circuitry |
| Burst Mode with 9µA IQ | Maintains regulation at microamp loads while holding output ripple <15mV - critical for always-on sensor nodes and backup power rails |
| Spread Spectrum Frequency Modulation | ±14–28% frequency deviation reduces peak EMI by spreading energy across bandwidth - simplifies EMC compliance without added filters |
| Programmable UVLO with Hysteresis | EN/UVLO pin enables accurate, resistor-programmable turn-on/turn-off thresholds (1.576V/1.545V typ) - prevents brownout oscillation in unstable input conditions |
| Thermally Optimized MSOP | θJA = 45°C/W; exposed PGND pad requires soldering to PCB ground plane - enables 2A switching at 125°C ambient without derating |
Applications
| Telecom Power Supply | Industrial Battery Management |
|---|---|
Use Scenario: Generating isolated 24V/48V rails from 12V or 24V battery banks in remote base stations and optical line terminals. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC controller implementing SEPIC topology to maintain regulation during deep battery discharge (down to 2.8V). Use Value: 100V switch withstands load-dump transients; Burst Mode extends backup runtime; SSFM meets EN55022 Class B conducted emissions limits. | Use Scenario: Powering PLC I/O modules and field sensors from 12–48V industrial batteries with strict low-power sleep requirements. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering stable 5V/3.3V rails during active operation and transitioning to 9µA sleep mode when idle. Use Value: BIAS pin improves full-load efficiency by diverting INTVCC current from main battery; programmable soft-start prevents inrush into capacitive loads. |
| Automotive ADAS Camera Module | Portable Medical Diagnostic Equipment |
Use Scenario: Providing regulated 5V and –5V supplies for image sensor biasing and analog front-end circuitry in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Dual-rail inverting/boost controller using single FBX pin to generate both polarities from 5–16V vehicle battery input. Use Value: AEC-Q100 qualified (E-grade); –40°C to +125°C operation ensures reliability in under-hood environments; low EMI supports CISPR-25 Class 5 compliance. | Use Scenario: Powering portable ultrasound or point-of-care blood analyzers requiring stable, low-noise ±15V rails from lithium-ion battery packs. IC Role / Device Role / Timing Role: High-voltage SEPIC controller generating 30V intermediate rail, followed by LDOs for precision analog stages. Use Value: 60V max input accommodates fully charged 4S Li-ion (16.8V) with headroom for surge; 15mV typical ripple preserves signal integrity in sensitive ADC/DAC paths. |
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#TRPBF | 4-switch synchronous buck-boost controller; no integrated switch; requires external MOSFETs; supports 4–36V input | Used where higher efficiency (>95%) and bidirectional power flow are required; unsuitable for space-constrained 100V single-switch designs | Select LTC3789EMSE#TRPBF only when synchronous rectification, wider duty cycle control, and input/output voltage inversion flexibility outweigh board area and BOM cost constraints. |
| MAX20077ATCB/V+T | 3.5A, 60V monolithic boost controller; fixed 2.2MHz fSW; no SEPIC/inverting support; integrated current sense | Targeted at automotive infotainment displays; lacks programmable frequency and multi-topology capability of LT8361EMSE#TRPBF | Choose MAX20077ATCB/V+T for cost-sensitive, high-volume automotive display backlighting where topology flexibility is unnecessary. |
Compared with LTC3789EMSE#TRPBF and MAX20077ATCB/V+T, the LT8361EMSE#TRPBF uniquely combines 100V integration, multi-topology support, and ultralow 9µA quiescent current in a single MSOP package-making it optimal for compact, wide-input, low-power industrial and medical converters where discrete switch count and standby power are critical.
Availability
LT8361EMSE#TRPBF is available at Aetrix Electronics and suitable for telecom power supplies, industrial battery management systems, and automotive ADAS camera modules requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LT8361EMSE#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8361EMSE#TRPBF belongs to Analog Devices' Power by Linear™ family of high-voltage DC/DC controllers, designed specifically for space-constrained, wide-input industrial and automotive power conversion where integration, efficiency, and EMI performance are critical.
FAQ
What topology configurations does the LT8361EMSE#TRPBF support?
The LT8361EMSE#TRPBF supports boost, SEPIC, and inverting converter topologies using a single FBX feedback pin. Its dual-error-amplifier architecture automatically selects between +1.60V reference (for positive outputs) and –0.80V reference (for negative outputs) based on external resistor divider connection. This eliminates the need for separate IC variants or external configuration logic, enabling flexible board reuse across multiple power architectures in the same product family.
How does the SYNC/MODE pin configure operating modes on the LT8361EMSE#TRPBF?
The SYNC/MODE pin on the LT8361EMSE#TRPBF provides five distinct configurations: grounding or pulling below 0.14V enables Burst Mode (9µA IQ); floating selects Pulse-Skip; connecting a 100kΩ resistor to GND activates Burst Mode + Spread Spectrum Frequency Modulation (SSFM); tying to INTVCC or >1.7V enables Pulse-Skip + SSFM; applying an external square wave (20–80% duty, 0.4–6V) synchronizes switching frequency. Each mode directly affects light-load efficiency, EMI profile, and timing alignment without requiring firmware or external logic.
What is the purpose and voltage range of the BIAS pin on the LT8361EMSE#TRPBF?
The BIAS pin on the LT8361EMSE#TRPBF supplies the internal INTVCC regulator when 4.4V ≤ BIAS ≤ VIN, thereby reducing input current drawn from VIN and improving overall efficiency-especially in SEPIC applications where VOUT may exceed VIN. If unused, the BIAS pin must be tied to GND. It is not a secondary output; it functions solely as an auxiliary input to the 3.8V LDO, and improper biasing (e.g., <4.4V or >VIN) disables this efficiency benefit.
Can the LT8361EMSE#TRPBF operate reliably at –40°C to +125°C junction temperature?
Yes, the LT8361EMSE#TRPBF is specified and guaranteed over a junction temperature range of –40°C to +125°C (E-grade). Its electrical characteristics-including FBX regulation voltage (±0.034V tolerance), EN/UVLO thresholds (±30mV), and switching frequency stability-are tested and assured across this full range. Thermal design must ensure the exposed PGND pad is soldered to a sufficient copper area to maintain θJA ≤ 45°C/W and prevent exceeding 125°C under maximum load conditions.
What are the absolute maximum ratings for the SW and EN/UVLO pins of the LT8361EMSE#TRPBF?
The SW pin of the LT8361EMSE#TRPBF has an absolute maximum rating of 100V, allowing safe operation in boost and SEPIC applications with high output voltages or transient spikes. The EN/UVLO pin is rated to 60V maximum, matching the VIN rating, and can be directly tied to the input rail. Exceeding either rating-even momentarily-may cause permanent damage. For robustness in automotive environments, external clamping (e.g., TVS diode on SW) is recommended when output voltages approach 100V or load-dump transients exceed specifications.
LT8361EMSE#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
LT8361EMSE#TRPBF FAQ
1.How can I place an order for LT8361EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8361EMSE#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 LT8361EMSE#TRPBF reliable?
The price and inventory of LT8361EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8361EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8361EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8361EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8361EMSE#TRPBF?
LT8361EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8361EMSE#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 LT8361EMSE#TRPBF?
For technical support, including LT8361EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8361EMSE#TRPBF requirements.
6.How does Aetrix verify that LT8361EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8361EMSE#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 LT8361EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8361EMSE#TRPBF?
All LT8361EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8361EMSE#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 LT8361EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8361EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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