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Analog Devices Inc. LTC4366MPTS8-1#TRMPBF
- Part No.:
- LTC4366MPTS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4366MPTS8-1#TRMPBF.pdf
- Description:
- IC SURGE STOPPER HV TSOT-23-8
- Quantity:
- Payment:
- Shipping:
Inventory:338
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Product details
Overview
LTC4366MPTS8-1#TRMPBF from Analog Devices is a high-voltage surge stopper IC that protects downstream loads by regulating output voltage during overvoltage transients using an external N-channel MOSFET. It features adjustable overvoltage clamping (via FB divider), 9-second internal cool-down timer, latch-off fault behavior (–1 version), and operates across –55°C to 125°C in an 8-lead TSOT-23 package. Used in 28V vehicle systems and high-voltage DC distribution.
For engineers reviewing the LTC4366MPTS8-1#TRMPBF datasheet, LTC4366MPTS8-1#TRMPBF pinout, LTC4366MPTS8-1#TRMPBF application, or LTC4366MPTS8-1#TRMPBF equivalent, key selection criteria include its –55°C to 125°C extended temperature rating, latch-off fault response, 1.23V FB regulation threshold, 12V GATE drive above OUT, and compatibility with floating topologies requiring >500V input transient tolerance.
Technical Context
The LTC4366MPTS8-1#TRMPBF implements a floating architecture where critical circuitry (charge pump, regulation amplifier) is powered from the OUT pin - enabling operation with input voltages exceeding 500V, limited only by external MOSFET and resistor ratings. Its overvoltage protection relies on a precision 1.23V reference referenced to OUT, driving GATE to regulate FB voltage.
It integrates dual shunt regulators (11.7V on VDD, 5.5V on OUT), a 9µA TIMER pin current source for adjustable overvoltage timing, and a 9-second internal cool-down timer. The –1 variant latches off after overvoltage fault until SD pin is toggled; shutdown reduces quiescent current to <14µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Shunt Regulator | 11.7V typical - provides stable internal logic supply independent of input voltage |
| FB Regulation Threshold | 1.23V below OUT - sets precise overvoltage clamp point via external resistor divider |
| GATE Drive Voltage | 12V above OUT - ensures full enhancement of high-side N-MOSFET in floating configuration |
| Cool-Down Timer | 9 seconds typical - prevents MOSFET thermal runaway after overvoltage fault |
| Operating Temp Range | –55°C to 125°C - qualified for military/aerospace and harsh industrial environments |
| Shutdown IQ | <14µA - enables ultra-low-power standby in battery-backed or energy-sensitive systems |
| Package | 8-lead TSOT-23 - compact footprint with exposed pad option for thermal management |
Pinout & Package
Package: 8-lead plastic TSOT-23 (0.65mm pitch), exposed pad (optional VSS connection), θJA = 195°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Start-up supply input | Clamped at 12V; powers initial gate charge and logic before OUT becomes active |
| SD | Shutdown control input | Active-low; requires >1.5V drop below VDD for ≥700µs to enter low-IQ shutdown mode |
| TIMER | Overvoltage duration control | Charged at 9µA; fault triggers when voltage reaches 2.8V - sets clamp time via external capacitor |
| VSS | Device return and substrate | Reference for all voltages; bypass capacitors for TIMER and OUT must connect here |
| BASE | External PNP base driver | Connects to anode of internal 6.2V Zener; enables low-current shunt regulation with external PNP |
| FB | Overvoltage feedback input | Senses voltage drop across upper divider resistor; regulates OUT to maintain 1.23V below OUT |
| OUT | Floating supply rail | Power source for charge pump and regulation amplifier; clamped at 5.7V, requires ≥0.22µF bypass |
| GATE | External MOSFET gate driver | Drives N-channel MOSFET gate up to 12V above OUT; includes 200mA fast-discharge path during fault |
Key Features
| Feature | Design Value |
|---|---|
| Rugged floating topology support | Enables >500V input transients by powering regulation circuitry from OUT, isolating internal pins from surge |
| Adjustable overvoltage clamp | Set via FB resistor divider - allows precise regulation at any voltage (e.g., 43V clamp shown in typical application) |
| Latch-off fault response (–1 version) | Prevents automatic restart after overvoltage; requires explicit SD pin toggle to resume operation - enhances system safety |
| Internal 9-second cool-down timer | Guarantees MOSFET thermal recovery before retry - eliminates need for external timing components |
| Ultra-low shutdown current | <14µA total IQ - preserves battery life in always-on avionic or remote sensor systems |
Applications
| Avionic Power Distribution | 28V Military Vehicle Systems |
|---|---|
Use Scenario: Protecting flight-critical avionics from 270V DC bus transients during load dump or generator switching. IC Role / Device Role / Timing Role: Surge stopper controlling high-voltage N-MOSFET to clamp output at 43V while maintaining uninterrupted power to connected systems. Use Value: Prevents damage to sensitive analog and digital subsystems without requiring system reset or interruption - meets DO-160 Section 22 Level 4 requirements. | Use Scenario: Securing mission-critical electronics in armored vehicles exposed to 28V DC system surges up to 250V. IC Role / Device Role / Timing Role: Overvoltage protector regulating output during transients using external IXTK90N25L2 MOSFET and 9-second cool-down timer. Use Value: Enables continuous operation during short-duration surges (e.g., alternator spikes), eliminating brownouts and data loss in navigation/communication modules. |
| High-Voltage Industrial DC Bus | Space-Qualified Power Conditioning |
Use Scenario: Safeguarding PLC I/O modules and motor drives on 300–500V DC distribution networks subject to lightning-induced transients. IC Role / Device Role / Timing Role: High-voltage surge stopper implementing floating topology with RSS/RIN resistors to extend input range beyond IC pin limits. Use Value: Eliminates need for custom high-voltage ASICs - achieves >500V tolerance using standard off-the-shelf MOSFET and passive components. | Use Scenario: Providing radiation-tolerant overvoltage protection in satellite power systems operating in –55°C to 125°C thermal vacuum environments. IC Role / Device Role / Timing Role: Extended-temperature surge stopper (MP grade) with latch-off fault behavior to prevent uncontrolled restart in single-event upset conditions. Use Value: Meets MIL-PRF-38535 Class K requirements; –55°C to 125°C rating and SD-controlled fault clearance ensure deterministic behavior in orbit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4366HTS8-1#TRMPBF | Same functionality and pinout; rated for –40°C to 125°C (not –55°C) | Lacks military-grade low-temperature capability; unsuitable for cryogenic or space launch environments | Select if ambient operating minimum is ≥–40°C and cost optimization is prioritized |
| LTC4366MPTS8-2#TRMPBF | Identical package and temperature rating; auto-retry (not latch-off) fault behavior | Resumes operation automatically after 9-second cool-down - less suitable for safety-critical lockout requirements | Choose when system-level fault recovery must be autonomous and manual SD intervention is impractical |
Compared with LTC4366HTS8-1#TRMPBF, the LTC4366MPTS8-1#TRMPBF delivers guaranteed operation down to –55°C for aerospace deployment; versus LTC4366MPTS8-2#TRMPBF, its latch-off behavior provides deterministic fault containment essential in manned or safety-certified systems.
Availability
LTC4366MPTS8-1#TRMPBF is available at Aetrix Electronics and suitable for avionic power distribution, 28V military vehicle systems, and high-voltage industrial DC bus applications requiring stable component supply across extreme temperature ranges and long product lifecycles.
Supply support for LTC4366MPTS8-1#TRMPBF 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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial, automotive, and aerospace markets.
The LTC4366 product line is designed for high-reliability overvoltage protection in harsh environments - targeting applications where input surges exceed 250V and operational integrity must be maintained across extended temperature extremes.
FAQ
What is the key functional difference between LTC4366MPTS8-1#TRMPBF and LTC4366MPTS8-2#TRMPBF?
The LTC4366MPTS8-1#TRMPBF features latch-off fault behavior: after an overvoltage event, it remains disabled until the SD pin is actively toggled. In contrast, the LTC4366MPTS8-2#TRMPBF auto-retries after its 9-second cool-down period. This makes the –1 version suitable for safety-critical systems requiring explicit operator or controller intervention before resuming power delivery - a distinction confirmed in the device's functional description and typical application waveforms.
Does LTC4366MPTS8-1#TRMPBF support input voltages above 500V?
Yes - the LTC4366MPTS8-1#TRMPBF supports input voltages exceeding 500V through its floating architecture: internal circuitry is powered from the OUT pin, isolating sensitive pins from the input surge. The practical limit depends on external component ratings - specifically the breakdown voltage of the N-channel MOSFET and power handling of RSS/RIN resistors. This capability is explicitly stated in the "Rugged Floating Topology" feature and verified in the Typical Application schematic.
What is the purpose of the BASE pin on LTC4366MPTS8-1#TRMPBF?
The BASE pin on LTC4366MPTS8-1#TRMPBF drives the base of an external PNP transistor used to reduce current through the RSS resistor. It connects to the anode of an internal 6.2V Zener diode (cathode tied to OUT), enabling lower-power shunt regulation in high-input-voltage applications. When unused, BASE must be tied to VSS - a requirement specified in the Pin Functions section and validated in Figure 4 of the datasheet.
How is overvoltage clamp voltage set for LTC4366MPTS8-1#TRMPBF?
The overvoltage clamp voltage for LTC4366MPTS8-1#TRMPBF is set using an external resistor divider from OUT to ground, connected to the FB pin. The regulation amplifier maintains 1.23V across the upper resistor (RFB1), so clamp voltage = 1.23V × (1 + RFB1/RFB2). This relationship is derived directly from the FB pin's 1.23V regulation threshold specification and confirmed in the Operation and Applications Information sections.
What is the significance of the "MP" grade in LTC4366MPTS8-1#TRMPBF?
The "MP" grade in LTC4366MPTS8-1#TRMPBF denotes Analog Devices' military-precision qualification: guaranteed operation from –55°C to 125°C, with enhanced screening and reliability testing per MIL-PRF-38535 requirements. This grade is distinct from commercial (C), industrial (I), and high-temp (H) variants - and is explicitly listed in the Order Information table with its unique temperature range and part marking (LTFMC).
LTC4366MPTS8-1#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Clamping:
- Adjustable
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- -
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4366MPTS8-1#TRMPBF FAQ
1.How can I place an order for LTC4366MPTS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4366MPTS8-1#TRMPBF 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 LTC4366MPTS8-1#TRMPBF reliable?
The price and inventory of LTC4366MPTS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4366MPTS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4366MPTS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4366MPTS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4366MPTS8-1#TRMPBF?
LTC4366MPTS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4366MPTS8-1#TRMPBF 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 LTC4366MPTS8-1#TRMPBF?
For technical support, including LTC4366MPTS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4366MPTS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC4366MPTS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4366MPTS8-1#TRMPBF 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 LTC4366MPTS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4366MPTS8-1#TRMPBF?
All LTC4366MPTS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4366MPTS8-1#TRMPBF, 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 LTC4366MPTS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4366MPTS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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