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Analog Devices Inc. LT8365HMSE#PBF
- Part No.:
- LT8365HMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LT8365HMSE#PBF.pdf
- Description:
- IC REG BST SEPIC TRAN DRV 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:246
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Product details
Overview
LT8365HMSE#PBF 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 industrial sensor biasing and automotive camera power supplies.
For engineers reviewing the LT8365HMSE#PBF datasheet, LT8365HMSE#PBF pinout, LT8365HMSE#PBF application, or LT8365HMSE#PBF equivalent, key selection criteria include its –40°C to 150°C junction temperature rating, single FBX pin enabling both positive/negative output programming, BIAS pin for efficiency optimization, spread-spectrum EMI reduction, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8365HMSE#PBF implements fixed-frequency current-mode control with programmable switching (100–500kHz) via RT resistor and supports five SYNC/MODE configurations: Burst Mode (≤9µA IQ), pulse-skipping, external clock synchronization, and spread-spectrum modulation. Its dual-regulation architecture uses ±1.6V/–0.8V internal references on the FBX pin to support both boost/SEPIC (positive VOUT) and inverting (negative VOUT) operation without topology change.
Protection includes thermal shutdown at >170°C, overcurrent detection (>3A), INTVCC UVLO (<2.5V), and EN/UVLO with 80mV hysteresis. The BIAS pin enables dynamic sourcing of the 3.8V INTVCC regulator from either VIN or an auxiliary supply (4.4V ≤ BIAS ≤ VIN), reducing input current draw and improving full-load efficiency in SEPIC or inverting configurations.
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 | 1.5A continuous, 150V breakdown - enables direct generation of high-voltage rails (e.g., –250V inverting output) without external MOSFETs. |
| Quiescent Current | 9µA in Burst Mode - sustains regulation with minimal standby power in always-on sensor or telemetry applications. |
| Switching Frequency | Programmable 100kHz–500kHz via RT resistor - balances efficiency, size, and EMI; supports synchronization to external clocks. |
| Operating Temperature | –40°C to +150°C junction - qualified per AEC-Q100 Grade H for under-hood automotive and harsh-environment industrial use. |
| Feedback Regulation | FBX = +1.60V (boost/SEPIC) or –0.80V (inverting) - single-pin topology selection eliminates need for mode-select resistors or logic. |
| EMI Reduction | Spread-spectrum modulation (±10% to ±14%) - reduces peak radiated emissions without filter redesign. |
Pinout & Package
The LT8365HMSE#PBF is housed in a thermally enhanced 16-lead MSOP package with four pins removed (MSE16 variation) to ensure ≥0.3mm creepage/clearance for high-voltage isolation. Exposed pad (Pin 17) is PGND/GND and must be soldered to 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 and shutdown control. |
| VIN | Main input supply | 2.8V–60V rated - requires local low-ESR ceramic bypass near exposed pad to minimize noise and voltage drop. |
| SW1/SW2 | Internal power switch drain terminals | 150V-rated, 1.5A capable - connected directly to inductor/diode; trace area must be minimized to reduce EMI. |
| FBX | Topology-selectable feedback input | Accepts +1.60V reference (boost/SEPIC) or –0.80V reference (inverting) - determines output polarity and regulation point with single resistor divider. |
| BIAS | Auxiliary INTVCC supply input | Accepts 4.4V–VIN supply - offloads INTVCC current from VIN, improving efficiency by up to 3% in SEPIC/inverting configurations. |
| SYNC/MODE | Multi-function control pin | Selects Burst Mode, pulse-skipping, external sync, or spread-spectrum - enables dynamic trade-off between light-load IQ and EMI performance. |
| SS | Soft-start timing node | 2µA constant-current charge - controls inductor current ramp rate during startup to prevent overshoot and component stress. |
| PGND/GND | Power and signal ground | Exposed pad (Pin 17) serves as primary thermal path - must be fully soldered to large copper pour for θJA = 45°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Single FBX topology selection | Eliminates external mode-switching circuitry - one resistor divider configures boost, SEPIC, or inverting output without layout changes. |
| Burst Mode with 9µA IQ | Maintains regulation while drawing less than typical MCU sleep current - extends battery life in portable diagnostic equipment. |
| Programmable soft-start | Capacitor-controlled ramp limits inrush current - prevents inductor saturation and diode overstress during cold start. |
| Spread-spectrum frequency modulation | ±10–14% deviation at fOSC/256 rate - lowers EMI peaks by 5–10dB without adding shielding or filters. |
| AEC-Q100 Grade H qualification | Validated for automotive under-hood operation - meets stress testing requirements for temperature cycling, HTOL, and ESD. |
Applications
| Industrial Sensor Biasing | Automotive Camera Power |
|---|---|
Use Scenario: Generating stable ±100V rails for avalanche photodiode (APD) bias in factory-floor laser distance sensors. IC Role / Device Role / Timing Role: Inverting converter delivering –100V @ 1mA with <15mV ripple and 9µA standby draw during idle periods. Use Value: Enables continuous APD monitoring without battery drain; high-voltage capability eliminates need for external charge pumps. | Use Scenario: Powering rear-view camera modules in vehicles with 12V battery input and requirement for –5V analog front-end bias. IC Role / Device Role / Timing Role: Inverting configuration operating at 400kHz with spread-spectrum modulation to pass CISPR-25 Class 5 radiated emissions. Use Value: Meets automotive EMI standards without added ferrites or shielded inductors; AEC-Q100 qualification ensures reliability at 150°C junction temp. |
| Portable Medical Imaging | Telecom Line Card Supply |
Use Scenario: Compact X-ray detector power module requiring isolated –250V output from a 9–30V input in handheld ultrasound units. IC Role / Device Role / Timing Role: High-voltage inverting converter using DFLS1150 diodes and WE-PD 74437324100 inductor per typical application TA01a. Use Value: Achieves –250V @ 10mA with single IC and minimal external components - reduces board area by >40% vs. discrete flyback solution. | Use Scenario: Generating +48V PoE midspan auxiliary rail from 3.3V/5V system supply in telecom access equipment. IC Role / Device Role / Timing Role: Boost converter with 500kHz switching and BIAS pin tied to 12V auxiliary rail to improve full-load efficiency by 2.8%. Use Value: Supports high-density line card layouts with minimal thermal derating; programmable UVLO prevents brownout during grid fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3780EFE#PBF | Requires external MOSFETs; no integrated 150V switch; supports synchronous rectification. | Better suited for >5A, >100W applications where efficiency >95% is critical; lacks integrated high-voltage switch. | Choose LTC3780EFE#PBF when scaling output power beyond 15W or requiring synchronous FET control. |
| LT8330EMSE#PBF | Lower 60V switch rating; 1.2A current limit; same 9µA Burst Mode IQ and FBX topology flexibility. | Ideal for 24V-input industrial I/O modules needing +36V or –36V rails; not rated for >60V input or >100V output. | Choose LT8330EMSE#PBF for cost-sensitive 24V-system designs where 60V switch rating suffices and footprint compatibility is required. |
Compared with LTC3780EFE#PBF and LT8330EMSE#PBF, the LT8365HMSE#PBF uniquely integrates a 150V/1.5A switch while retaining ultralow IQ and single-pin topology selection - making it optimal for space-constrained, high-input-voltage applications where external FETs or voltage derating are unacceptable.
Availability
LT8365HMSE#PBF is available at Aetrix Electronics and suitable for industrial sensor biasing, automotive camera power, portable medical imaging, and telecom line card supply requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LT8365HMSE#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 industrial, automotive, communications, and healthcare markets.
The LT8365HMSE#PBF belongs to Analog Devices' Power by Linear™ family of high-voltage DC/DC controllers and monolithic converters, designed specifically for compact, efficient, and robust power conversion in harsh environments with wide input ranges and stringent EMI requirements.
FAQ
What is the maximum output voltage achievable with the LT8365HMSE#PBF in inverting configuration?
The LT8365HMSE#PBF supports inverting operation up to –250V output, as demonstrated in the Typical Application TA01a (400kHz, –250V @ 10mA). This is enabled by its 150V-rated internal switch used in conjunction with external diodes and proper layout - the absolute maximum switch voltage remains 150V, so output magnitude depends on topology and external component ratings. Always verify diode PIV and capacitor WV ratings exceed peak stresses.
Does the LT8365HMSE#PBF require external compensation components?
Yes, the LT8365HMSE#PBF requires external compensation via the VC pin. A Type II or Type III network (resistor + capacitor + optional second capacitor) must be connected between VC and GND to stabilize the current-mode loop across input/output variations. The datasheet provides design equations and stability guidelines based on inductor value, output capacitance, and load range - omitting compensation risks oscillation or poor transient response.
How does the BIAS pin improve efficiency in the LT8365HMSE#PBF?
The BIAS pin improves efficiency in the LT8365HMSE#PBF by supplying the 3.8V INTVCC regulator from an auxiliary source (4.4V ≤ BIAS ≤ VIN) instead of drawing current from VIN. In SEPIC or inverting configurations where VOUT ≈ VIN or VOUT > VIN, connecting BIAS to VOUT reduces total input current by ~1.2mA at full load - yielding measurable efficiency gains (up to 2.8% at 12V→48V boost) and lower thermal stress on the input path.
Can the LT8365HMSE#PBF operate without the SS (soft-start) capacitor?
No, the LT8365HMSE#PBF requires an external capacitor on the SS pin for safe startup. Without it, the internal 2µA current source has no integration node, causing uncontrolled VC ramp and excessive inductor current surge - risking diode failure, inductor saturation, or output overshoot. A typical 1nF–10nF ceramic capacitor sets a controlled rise time; the datasheet specifies minimum 1nF for reliable fault-free start-up across temperature and input conditions.
Is the LT8365HMSE#PBF pin-compatible with other LT836x variants like LT8365EMSE#PBF?
Yes, the LT8365HMSE#PBF is pin-compatible with LT8365EMSE#PBF and LT8365JMSE#PBF - all share identical 16-lead MSOP package with same pinout, footprint, and thermal pad layout. The only differences are guaranteed operating temperature range (–40°C to +150°C for H-grade) and AEC-Q100 qualification. No PCB redesign is needed when upgrading from E- or J-grade to H-grade for automotive or high-temp industrial use.
LT8365HMSE#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, 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
LT8365HMSE#PBF FAQ
1.How can I place an order for LT8365HMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8365HMSE#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 LT8365HMSE#PBF reliable?
The price and inventory of LT8365HMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8365HMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8365HMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8365HMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8365HMSE#PBF?
LT8365HMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8365HMSE#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 LT8365HMSE#PBF?
For technical support, including LT8365HMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8365HMSE#PBF requirements.
6.How does Aetrix verify that LT8365HMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8365HMSE#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 LT8365HMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8365HMSE#PBF?
All LT8365HMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8365HMSE#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 LT8365HMSE#PBF part is unused and in its original packaging.
Return procedure for LT8365HMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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