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Analog Devices Inc. LT8365EMSE#TRPBF
- Part No.:
- LT8365EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LT8365EMSE#TRPBF.pdf
- Description:
- IC REG BST SEPIC TRAN DRV 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,940
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Product details
Overview
LT8365EMSE#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 at programmable frequencies from 100kHz to 500kHz - ideal for high-voltage portable medical imaging and industrial sensor bias supplies.
For engineers reviewing the LT8365EMSE#TRPBF datasheet, LT8365EMSE#TRPBF pinout, LT8365EMSE#TRPBF application, or LT8365EMSE#TRPBF equivalent, key selection considerations include its single FBX pin enabling both positive/negative output programming, BIAS pin for efficiency optimization, SYNC/MODE pin for EMI-reducing spread-spectrum modulation, and thermally enhanced 16-lead MSOP package with exposed PGND pad.
Technical Context
The LT8365EMSE#TRPBF uses fixed-frequency current-mode control with external RT resistor programming and dual error amplifiers (A1/A2) that auto-select based on FBX polarity - enabling seamless topology reconfiguration without hardware changes. Its unique single feedback architecture supports ±0.8V/±1.6V regulation references for inverting and boost/SEPIC modes respectively.
Burst Mode operation employs sleep-cycle interleaving with 9µA VIN quiescent current, while pulse-skipping and SSFM modes are selected via SYNC/MODE pin voltage thresholds (0.14V, 1.7V, or external clock). Frequency foldback and programmable soft-start (2µA charge current) ensure stable startup under wide VIN/VOUT conditions.
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 –250V inverting outputs and high-ratio boost conversion |
| Quiescent Current | 9µA in Burst Mode - extends battery life in always-on portable diagnostics equipment |
| Switching Frequency | 100kHz to 500kHz (RT-programmable) - balances efficiency, size, and EMI in space-constrained designs |
| FBX Regulation | +1.60V or –0.80V reference - single-pin configuration of positive or negative output without external logic |
| Operating Temp | –40°C to +125°C junction - qualified for extended-temperature industrial and automotive environments |
| Package | 16-lead MSOP with 4 pins removed - provides HV creepage spacing and 45°C/W θJA for thermal reliability |
Pinout & Package
The LT8365EMSE#TRPBF is housed in a thermally enhanced 16-lead MSOP package (MSE16 variation) with pins 2, 3, 4, and 15 removed to ensure high-voltage isolation between SW and adjacent terminals. The exposed pad (Pin 17) is 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 and undervoltage lockout input | 1.6V rising threshold with 80mV hysteresis - enables precise system-level brownout protection |
| VIN | Main input supply | 2.8V–60V rated - requires local ceramic bypassing near exposed PGND copper |
| INTVCC | Internal 3.8V LDO output | Must be bypassed with 1µF ceramic - no external loading permitted |
| BIAS | Secondary supply for INTVCC | Accepts 4.4V–VIN - reduces VIN current draw and improves full-load efficiency |
| FBX | Topology-agnostic feedback input | Auto-selects +1.60V or –0.80V reference - eliminates need for external mode-select circuitry |
| RT | Frequency programming input | Resistor-to-GND sets fSW from 100–500kHz - enables EMI tuning without changing layout |
| SS | Soft-start timing node | 2µA constant-current charge - controls inductor current ramp rate during startup/fault recovery |
| SYNC/MODE | Multi-function control pin | Selects Burst, pulse-skipping, sync, or SSFM - configures light-load efficiency vs. EMI trade-off |
| SW1/SW2 | Power switch drain/source | 150V, 1.5A rated - minimized trace area required to suppress switching noise |
| PGND/GND | Power and signal ground | Exposed pad (Pin 17) - mandatory thermal connection to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Single FBX topology selection | Eliminates external mode-switching components and PCB real estate for multi-output systems |
| Burst Mode with 9µA IQ | Extends runtime in battery-powered portable ultrasound and X-ray detector modules |
| Spread-spectrum modulation | Reduces peak EMI by >10dB without adding filtering components or compromising efficiency |
| Programmable UVLO via EN/UVLO | Enables custom input brownout thresholds using two resistors - avoids system-level reset ICs |
| Thermally optimized MSOP | 45°C/W θJA and exposed PGND pad - sustains 1.5A switching in compact industrial enclosures |
Applications
| Portable Medical Imaging | Industrial Sensor Bias |
|---|---|
Use Scenario: Handheld X-ray detectors requiring –250V bias for scintillator photodiodes. IC Role / Device Role / Timing Role: Inverting DC/DC controller generating regulated negative high voltage from a 9–30V battery input. Use Value: Single FBX pin simplifies feedback network design; 150V switch rating enables direct –250V generation without cascaded stages. | Use Scenario: High-precision gas analyzers needing stable +48V and –24V rails for MEMS sensor excitation. IC Role / Device Role / Timing Role: Dual-rail power manager configured as boost and inverting converters sharing one IC footprint. Use Value: Programmable frequency (100–500kHz) allows EMI optimization around sensor measurement windows. |
| Automotive ADAS Power | Telecom Remote PHY |
Use Scenario: Radar front-end modules operating from 12V vehicle battery with cold-crank tolerance down to 2.8V. IC Role / Device Role / Timing Role: Wide-input boost converter powering GaN RF amplifiers with tight ripple requirements. Use Value: 9µA Burst Mode IQ maintains functionality during engine start; AEC-Q100 qualification ensures automotive reliability. | Use Scenario: Outdoor fiber node power supplies converting 48V PoE to ±15V for analog front-end conditioning. IC Role / Device Role / Timing Role: Isolated auxiliary supply generator using SEPIC topology for input-to-output fault isolation. Use Value: BIAS pin allows VOUT to power INTVCC - improves efficiency when VIN > VOUT, critical for thermal-limited enclosures. |
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#TRPBF | Fixed 55V max switch voltage; no inverting capability; requires external MOSFETs | Best suited for high-current synchronous boost only - not viable for –250V or wide-VIN inverting designs | Select LT8365EMSE#TRPBF when integrated 150V switch, topology flexibility, or ultralow IQ are required |
| MAX25203ATPA/VY+ | Integrated 60V/3A switch; supports only boost/SEPIC; no negative output capability | Targeted at automotive infotainment displays - lacks FBX polarity auto-detection for inverting use | Choose LT8365EMSE#TRPBF for applications demanding true bipolar output programmability and 150V robustness |
Compared with LTC3780EMSE#TRPBF and MAX25203ATPA/VY+, the LT8365EMSE#TRPBF uniquely combines 150V integrated switching, single-pin topology selection, and 9µA Burst Mode IQ - making it the only option capable of direct –250V generation in a 16-pin MSOP without external high-voltage components.
Availability
LT8365EMSE#TRPBF is available at Aetrix Electronics and suitable for portable medical imaging, industrial sensor bias, and automotive ADAS power systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8365EMSE#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 communications markets.
The LT8365EMSE#TRPBF belongs to Analog Devices' Power by Linear™ family of high-voltage DC/DC controllers, 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 LT8365EMSE#TRPBF in inverting configuration?
The LT8365EMSE#TRPBF supports inverting configurations up to –250V output, as validated in the datasheet's Typical Application (TA01a) using standard external components. This capability relies on its 150V-rated internal switch and proper selection of high-voltage diodes and magnetics - the LT8365EMSE#TRPBF itself does not limit output voltage beyond its switch breakdown rating and loop stability constraints.
Can LT8365EMSE#TRPBF operate without the BIAS pin connected?
Yes, the LT8365EMSE#TRPBF operates fully functional with BIAS tied to GND. In this configuration, INTVCC is powered solely from VIN. While efficiency is slightly reduced at higher loads compared to BIAS-assisted operation, all core functions - including Burst Mode, frequency programming, and feedback regulation - remain unaffected. The LT8365EMSE#TRPBF datasheet explicitly states BIAS is optional for basic operation.
How does the SYNC/MODE pin select between Burst Mode and spread-spectrum operation?
The LT8365EMSE#TRPBF uses precise voltage thresholds on the SYNC/MODE pin: tying it below 0.14V selects Burst Mode; connecting a 100kΩ resistor to GND enables Burst Mode at light loads and automatic transition to spread-spectrum modulation at heavy loads; applying >1.7V or an external clock selects pulse-skipping with spread-spectrum. These states are internally decoded - no external logic is needed. The LT8365EMSE#TRPBF datasheet defines all five valid input conditions in the Pin Functions section.
Is LT8365EMSE#TRPBF pin-compatible with other members of the LT836x family?
No, the LT8365EMSE#TRPBF is not pin-compatible with LT8361, LT8362, or LT8364. Although 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 FBX. Substituting without schematic and layout revision will cause functional failure. The LT8365EMSE#TRPBF datasheet confirms unique pin mapping in the Pin Configuration diagram.
What thermal derating applies to LT8365EMSE#TRPBF at 125°C ambient?
At 125°C ambient, the LT8365EMSE#TRPBF's maximum allowable power dissipation is limited by its θJA of 45°C/W and maximum junction temperature of 125°C, resulting in ~0W theoretical margin - meaning full 1.5A switching is not sustainable without forced cooling or reduced duty cycle. Derating curves in the datasheet show output current must be reduced to ~0.8A at 125°C ambient with standard 2-layer PCB copper. The LT8365EMSE#TRPBF requires careful thermal design in high-ambient environments.
LT8365EMSE#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8365EMSE#TRPBF FAQ
1.How can I place an order for LT8365EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8365EMSE#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 LT8365EMSE#TRPBF reliable?
The price and inventory of LT8365EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8365EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8365EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8365EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8365EMSE#TRPBF?
LT8365EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8365EMSE#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 LT8365EMSE#TRPBF?
For technical support, including LT8365EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8365EMSE#TRPBF requirements.
6.How does Aetrix verify that LT8365EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8365EMSE#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 LT8365EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8365EMSE#TRPBF?
All LT8365EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8365EMSE#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 LT8365EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8365EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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