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Analog Devices Inc. LT8365JMSE#TRPBF
- Part No.:
- LT8365JMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LT8365JMSE#TRPBF.pdf
- Description:
- IC REG BST SEPIC TRAN DRV 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,168
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Product details
Overview
LT8365JMSE#TRPBF from Analog Devices is a current-mode DC/DC converter IC with a 1.5A, 150V internal power switch, supporting boost, SEPIC, and inverting topologies across a 2.8V–60V input range. It delivers ultralow 9µA quiescent current in Burst Mode, maintains ≤15mV output ripple, and operates up to 500kHz with external frequency programming - ideal for high-voltage portable medical imaging and industrial sensor bias supplies.
For engineers reviewing the LT8365JMSE#TRPBF datasheet, LT8365JMSE#TRPBF pinout, LT8365JMSE#TRPBF application, or LT8365JMSE#TRPBF equivalent, key selection criteria include its single FBX pin enabling both positive/negative output programming, BIAS pin for efficiency optimization, AEC-Q100 qualification (J-grade), thermally enhanced 16-lead MSOP package with 4 pins removed, and SYNC/MODE pin supporting Burst Mode, pulse-skipping, synchronization, and spread-spectrum EMI reduction.
Technical Context
The LT8365JMSE#TRPBF implements fixed-frequency current-mode control with programmable oscillator (100–500kHz via RT resistor) and dual error amplifier architecture: one optimized for +1.60V regulation (boost/SEPIC), the other for –0.80V regulation (inverting). Its unique single FBX pin automatically selects active amplifier based on feedback polarity, eliminating topology-specific configuration pins.
It integrates frequency foldback during startup/faults, programmable soft-start (2µA charge current), overcurrent protection (3A trip threshold), thermal shutdown (>170°C), and intelligent INTVCC sourcing-drawing from BIAS (4.4–VIN V) when available to reduce VIN load. The SYNC/MODE pin supports five distinct operational modes via voltage thresholds or external clock injection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 60V - supports wide-range industrial and automotive battery inputs without pre-regulation. |
| Switch Rating | 1.5A continuous, 150V breakdown - enables direct generation of –250V outputs in inverting configurations with margin. |
| Quiescent Current | 9µA in Burst Mode - sustains >90% efficiency at µA-level loads typical in always-on sensor nodes. |
| Switching Frequency | 100kHz to 500kHz, programmable via RT pin - balances EMI, size, and efficiency across 10:1 range. |
| Output Polarity Support | Positive or negative via single FBX pin - eliminates need for separate IC variants or external logic for polarity selection. |
| Operating Junction Temp | –40°C to +150°C - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive and harsh industrial environments. |
| Package | 16-lead MSOP with 4 pins removed - provides high-voltage creepage/clearance (≥8mm) between SW and GND/BIAS pins. |
Pinout & Package
LT8365JMSE#TRPBF uses a thermally enhanced 16-lead MSOP package (MSE16 variation) with pins 2, 4, 13, and 15 removed to increase high-voltage spacing. The exposed pad (Pin 17) is PGND/GND and must be soldered to PCB ground plane for thermal and electrical performance. θJA = 45°C/W, θJC = 10°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO | Enable / Undervoltage Lockout Input | Active-high enable with 1.6V rising threshold and 80mV hysteresis; <0.2V reduces VIN current to <1µA for ultra-low-power shutdown. |
| VIN | Main Input Supply | 2.8V–60V input; powers internal circuitry unless BIAS is active; requires local ceramic bypass near pin. |
| SW1/SW2 | Power Switch Drain Terminals | 150V, 1.5A internal MOSFET outputs; minimized trace area required to suppress EMI radiation. |
| FBX | Feedback Input | Single pin accepting either +1.60V (boost/SEPIC) or –0.80V (inverting) reference; determines active error amplifier path. |
| BIAS | Secondary Supply Input | Accepts 4.4V–VIN to power INTVCC regulator, reducing VIN current draw and improving full-load efficiency by up to 3%. |
| SYNC/MODE | Mode Selection & Clock Input | Five-mode control: GND = Burst Mode; float = pulse-skipping; INTVCC = pulse-skipping+SSFM; external clock = sync+pulse-skipping. |
| RT | Frequency Programming | Resistor-to-GND sets switching frequency from 100kHz (432kΩ) to 500kHz (84.5kΩ); enables precise EMI tuning. |
| SS | Soft-Start Control | 2µA constant-current charge; capacitor value sets ramp time; internal 220Ω discharge path resets on fault/shutdown. |
| VC | Error Amplifier Output | Connects to external compensation network; controls peak switch current; pulled low during faults to disable switching. |
| PGND/GND | Power & Signal Ground | Exposed pad (Pin 17) serves as primary thermal path and low-impedance return for SW, VIN, and FBX circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Single FBX Pin Topology Flexibility | Eliminates board-level jumpers or configuration resistors - same layout supports boost, SEPIC, and inverting outputs via feedback network only. |
| Burst Mode with 9µA IQ | Maintains regulation at µA loads while keeping output ripple ≤15mV - critical for battery-powered diagnostic equipment with intermittent operation. |
| Spread Spectrum Frequency Modulation | ±20% frequency dithering at fOSC/256 rate reduces peak EMI by >10dB without altering filter design or layout. |
| Programmable UVLO with Hysteresis | EN/UVLO pin allows precise system-level brownout protection (e.g., 12V system turns off at 9.5V, restarts at 10.1V) using two external resistors. |
| Thermally Optimized MSOP Package | 4-pin removal increases HV spacing; exposed pad soldering reduces junction-to-board thermal resistance to 10°C/W - enables 1.5A continuous operation at 125°C ambient. |
Applications
| Portable X-Ray Sensor Bias | Automotive High-Voltage Telematics |
|---|---|
Use Scenario: Compact handheld X-ray detectors require stable –250V bias for CMOS image sensors during brief exposure pulses, powered from a 12V vehicle battery. IC Role / Device Role / Timing Role: LT8365JMSE#TRPBF operates in inverting mode with 400kHz switching, delivering regulated –250V at 10mA with <15mV ripple and <9µA standby draw between exposures. Use Value: Single-chip solution replaces discrete flyback + linear regulator stacks, cutting board area by 65% and enabling true battery-operated portability. |
Use Scenario: Automotive telematics units need isolated ±15V rails for CAN transceivers and GPS front-ends, surviving cold-crank (4.5V) and load-dump (60V) conditions. IC Role / Device Role / Timing Role: LT8365JMSE#TRPBF configured as SEPIC generates +15V from 4.5–60V input; AEC-Q100 J-grade ensures reliability over –40°C to +150°C junction temperature. Use Value: Eliminates need for external pre-regulator or wide-input LDO, simplifying power tree and passing ISO 7637-2 Pulse 5a without additional clamping. |
| Industrial IoT Edge Node Power | Medical Ultrasound Transducer Driver |
Use Scenario: Wireless vibration sensors deployed in factory machinery operate from 24V DC rails but must survive 60V surges and deliver 3.3V/5V for MCU and radio with <10µA sleep current. IC Role / Device Role / Timing Role: LT8365JMSE#TRPBF in boost mode with BIAS tied to output powers INTVCC, achieving 92% efficiency at 1mA and 9µA quiescent in Burst Mode. Use Value: Enables 10-year battery life in sealed enclosures by minimizing no-load losses - 3× lower IQ than comparable 60V boost controllers. |
Use Scenario: Portable ultrasound systems require fast-switching ±100V driver stages for piezoelectric transducers, demanding low-noise, tightly regulated supplies with minimal EMI coupling into analog receive paths. IC Role / Device Role / Timing Role: LT8365JMSE#TRPBF in synchronized pulse-skipping mode (external 300kHz clock) delivers ±100V with SSFM enabled to suppress narrowband EMI peaks near sensitive RF bands. Use Value: Reduces conducted EMI by 15dB compared to fixed-frequency operation, easing FCC Class B compliance without shielding or ferrites. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8362EMSE#TRPBF | Lower 100V switch rating, 1.2A current limit, –40°C to +125°C temp grade, no AEC-Q100 qualification. | Suitable for non-automotive industrial applications where 150V margin or 150°C operation is not required. | Select LT8362EMSE#TRPBF only if input/output voltage stress remains below 100V and ambient temperature stays ≤125°C. |
| MAX17504ATP+T | 60V max input, 3.5A switch, no inverting topology support, no BIAS pin, 5mm × 5mm TQFN package. | Better suited for high-current boost/SEPIC where negative output is unnecessary and thermal mass is constrained. | Choose MAX17504ATP+T when output current exceeds 1.5A and negative voltage generation is not needed - but verify layout clearance for 150V SW node. |
Compared with LT8362EMSE#TRPBF and MAX17504ATP+T, the LT8365JMSE#TRPBF uniquely combines 150V switch capability, single-pin polarity selection, ultralow 9µA Burst Mode IQ, and AEC-Q100 qualification - making it the only option for automotive or medical inverting supplies above 100V with stringent efficiency and reliability requirements.
Availability
LT8365JMSE#TRPBF is available at Aetrix Electronics and suitable for industrial IoT edge nodes, automotive telematics modules, and portable medical imaging devices requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT8365JMSE#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 since 1965.
The LT8365JMSE#TRPBF belongs to Analog Devices' Power by Linear™ family of high-voltage monolithic DC/DC converters, designed specifically for space-constrained, high-reliability applications demanding wide input range, ultralow quiescent current, and flexible topology support.
FAQ
What is the maximum output voltage achievable with LT8365JMSE#TRPBF in inverting configuration?
The LT8365JMSE#TRPBF supports inverting operation with a 150V-rated internal switch. In the documented –250V output application (TA01a), it achieves –250V at 10mA using external diodes and inductor. Absolute maximum switch voltage is 150V, so output magnitude is limited by external component ratings and layout - the IC itself does not clamp beyond its 150V SW rating. For reliable –250V output, external diodes must withstand ≥300V reverse voltage and layout must maintain >4mm creepage.
Does LT8365JMSE#TRPBF require external compensation components?
Yes, the LT8365JMSE#TRPBF requires external compensation components connected to the VC pin. Its current-mode architecture uses a Type II or Type III compensation network (typically one capacitor, one resistor, and optionally a second capacitor) to stabilize the control loop across varying input/output conditions. The datasheet provides design equations and example values for common boost/SEPIC/inverting configurations, and recommends starting with the 432kΩ RT resistor case for initial stability verification.
Can LT8365JMSE#TRPBF be synchronized to an external clock while operating in Burst Mode?
No, LT8365JMSE#TRPBF cannot operate in Burst Mode when synchronized to an external clock. Per the datasheet, applying an external clock to the SYNC/MODE pin forces pulse-skipping mode instead of Burst Mode, even at light loads. This ensures deterministic timing alignment for EMI-sensitive applications but increases light-load quiescent current to ~1.2mA versus 9µA in standalone Burst Mode. To retain ultralow IQ, use internal Burst Mode or the 100kΩ-to-GND SSFM configuration.
How does the BIAS pin improve efficiency in LT8365JMSE#TRPBF?
The BIAS pin improves efficiency by supplying the INTVCC regulator (3.8V internal LDO) from an auxiliary source (4.4V ≤ BIAS ≤ VIN) instead of drawing that current from VIN. In SEPIC or boost applications where VOUT > VIN, connecting BIAS to VOUT reduces VIN supply current by ~10–15mA at full load - directly increasing overall converter efficiency by 1–3% depending on input voltage and load. The IC automatically switches sources based on BIAS voltage level and presence.
Is LT8365JMSE#TRPBF pin-compatible with other LT836x family members?
No, LT8365JMSE#TRPBF is not pin-compatible with other LT836x variants such as LT8361 or LT8362. While all share the same 16-lead MSOP package outline, pin functions differ significantly - for example, LT8361 lacks the BIAS pin and uses separate COMP and FB pins instead of the unified FBX pin. Layout reuse is not possible; each variant requires dedicated PCB design per its specific pinout and functional requirements.
LT8365JMSE#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, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Transistor Driver
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- 150V (Switch)
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 100kHz ~ 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8365JMSE#TRPBF FAQ
1.How can I place an order for LT8365JMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8365JMSE#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 LT8365JMSE#TRPBF reliable?
The price and inventory of LT8365JMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8365JMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8365JMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8365JMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8365JMSE#TRPBF?
LT8365JMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8365JMSE#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 LT8365JMSE#TRPBF?
For technical support, including LT8365JMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8365JMSE#TRPBF requirements.
6.How does Aetrix verify that LT8365JMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8365JMSE#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 LT8365JMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8365JMSE#TRPBF?
All LT8365JMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8365JMSE#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 LT8365JMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8365JMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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