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Analog Devices Inc. LTC4365HTS8-1#TRMPBF
- Part No.:
- LTC4365HTS8-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365HTS8-1#TRMPBF.pdf
- Description:
- IC OVERVOLTAGE PROT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:993
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Product details
Overview
LTC4365HTS8-1#TRMPBF from Analog Devices is a high-reliability automotive-grade overvoltage, undervoltage, and reverse supply protection controller for 12V systems. It operates from 2.5V to 34V, withstands –40V to 60V fault transients, delivers 9.8V gate enhancement to external N-channel MOSFETs, consumes only 125µA quiescent current, and features 1ms fast recovery-enabling robust surge protection in automotive ECUs and industrial power inputs.
For engineers reviewing the LTC4365HTS8-1#TRMPBF datasheet, LTC4365HTS8-1#TRMPBF pinout, LTC4365HTS8-1#TRMPBF application, or LTC4365HTS8-1#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed AEC-Q100 qualification, real-world timing behavior (1ms recovery), and precise comparator thresholds (500mV ±7.5mV) critical for automotive voltage window design.
Technical Context
The LTC4365HTS8-1#TRMPBF integrates dual precision comparators (UV/OV) with 25mV hysteresis and 1µs propagation delay, each referenced to a stable 0.5V internal threshold. Its charge pump drives external N-channel MOSFET gates up to 9.8V above VOUT, enabling low-RDS(on) conduction while maintaining <10µA shutdown current.
Unlike the standard LTC4365, the "-1" variant replaces the 36ms recovery timer with a 1ms delay-verified across –40°C to 125°C-making it suitable for applications requiring rapid reconnection after transient faults, such as start-stop vehicle systems or industrial PLC power rails where downtime must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - supports nominal 12V automotive systems and wide-input industrial supplies without external regulation. |
| Fault Withstand Range | –40V to 60V - blocks reverse battery connection, load dump spikes, and AC line coupling without TVS diodes. |
| UV/OV Threshold Accuracy | 500mV ±7.5mV - enables precise 5V–18V input windows using standard 1% resistors (e.g., R1=84.5kΩ, R2=215kΩ, R3=2.74MΩ). |
| Recovery Delay Time | 1ms (LTC4365-1 variant) - ensures fast re-enabling after brief overvoltage events, critical for engine cranking recovery. |
| Quiescent Current | 125µA typical - minimizes parasitic drain on vehicle batteries during sleep mode. |
| Shutdown Current | 10µA - meets automotive low-power requirements for always-on monitoring circuits. |
| Package & Temp Grade | 8-Lead TSOT-23, –40°C to 125°C - qualified per AEC-Q100 Grade H for under-hood deployment. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (LTGKZ marking), 0.65mm pitch, exposed pad optional for thermal relief. Dimensions: 2.9mm × 1.6mm × 0.85mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-channel MOSFET gate drive output | Charge-pump-enhanced output (up to +9.8V relative to VOUT); sinks 50mA during fault to rapidly turn off external FETs. |
| VOUT | Output voltage sense reference | Serves as charge pump return and gate drive reference; tracks load-side rail to maintain safe VGS during transients. |
| FAULT | Open-drain fault status indicator | Pulled low during UV/OV fault, SHDN assertion, or VIN < VIN(UVLO); compatible with 5V/3.3V logic interfaces. |
| SHDN | Active-low enable/disable control | Threshold at 0.75V; places device in 10µA shutdown and initiates gentle gate turn-off (250µs slew control). |
| VIN | High-voltage input supply terminal | Withstands –40V to 60V; powers internal circuitry and feeds reverse-protection comparator; no input capacitor required. |
| UV | Undervoltage comparator input | 0.5V falling threshold with 25mV hysteresis; accepts high-impedance resistor divider (leakage <10nA) for precise low-voltage cutoff. |
| OV | Overvoltage comparator input | 0.5V rising threshold with 25mV hysteresis; enables accurate high-voltage trip (e.g., 18V for 12V systems) with noise immunity. |
| GND | Device ground reference | Common return for all analog and digital circuitry; exposed pad may be connected to PCB ground for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Fast 1ms fault recovery | Enables immediate reconnection after short-duration surges (e.g., alternator load dump ringing), reducing system downtime in automotive start-stop cycles. |
| AEC-Q100 Grade H qualification | Validated for –40°C to 125°C operation with full reliability testing-suitable for engine control units, ADAS sensors, and body electronics. |
| No external TVS or input capacitor required | Reduces BOM count and board space by integrating 60V fault tolerance and internal charge pump-ideal for compact ECU designs. |
| Gentle shutdown with VOUT tracking | Prevents output voltage collapse-induced latch-up by forcing GATE to follow VOUT decay, eliminating inductive kickback in motor or solenoid loads. |
| Reverse supply blocking to –40V | Automatically disconnects load when battery is installed backward or negative supply is applied-no P-channel FET or Schottky diode needed. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Protects microcontroller and CAN transceiver from 12V battery transients including load dump (up to 60V), cold crank (down to 2.5V), and reverse polarity. IC Role / Device Role / Timing Role: Input voltage fault protection controller that isolates downstream circuitry via external N-channel MOSFETs; asserts FAULT within 1µs of UV/OV violation. Use Value: Eliminates need for discrete TVS diodes and series P-FETs, reducing solution size by >40% while meeting ISO 7637-2 Pulse 5a requirements. | Use Scenario: Secures 24V DC input of modular I/O base against field wiring errors, induced lightning surges, and shared supply faults. IC Role / Device Role / Timing Role: Dual-threshold supervisor controlling back-to-back N-MOSFETs; maintains power continuity during brief brownouts (<1ms) due to 1ms recovery timer. Use Value: Enables hot-swap capability and prevents cascading failure across distributed I/O modules during field maintenance. |
| Portable Medical Diagnostic Equipment | Commercial Vehicle Telematics Unit |
Use Scenario: Ensures uninterrupted operation of battery-powered ultrasound or ECG devices during AC adapter swaps or accidental reverse connection. IC Role / Device Role / Timing Role: Reverse/overvoltage guard IC with shutdown-controlled sequencing; uses SHDN to coordinate with system PMIC during power-up. Use Value: Guarantees zero data loss during adapter transitions by sustaining VOUT via hold-up capacitance while GATE remains active. | Use Scenario: Shields GPS/GSM module and SD card interface from 24V truck battery fluctuations, including jump-start spikes and alternator ripple. IC Role / Device Role / Timing Role: High-voltage input protector with 125µA quiescent current; FAULT signal triggers watchdog reset if input falls outside 9V–32V window. Use Value: Extends battery runtime in always-connected telematics by minimizing standby current while maintaining full fault coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365ITS8-1#TRMPBF | Same functionality and pinout, but rated for –40°C to 85°C (Grade I) instead of –40°C to 125°C (Grade H). | Suitable for cabin-mounted infotainment or non-under-hood telematics where ambient temperature stays below 85°C. | Select LTC4365HTS8-1#TRMPBF for under-hood or high-ambient industrial use; choose LTC4365ITS8-1#TRMPBF for cost-sensitive interior applications. |
| TPS26631RGER | Integrated 60V eFuse with current limiting (0.5–5A), but lacks reverse voltage blocking and has fixed 6.5V UVLO. | Better for overcurrent + overvoltage co-protection; unsuitable for reverse polarity or adjustable UV/OV windows. | Use TPS26631RGER when current limiting is mandatory; retain LTC4365HTS8-1#TRMPBF when reverse protection and programmable thresholds are required. |
Compared with LTC4365ITS8-1#TRMPBF, the LTC4365HTS8-1#TRMPBF adds guaranteed operation up to 125°C and AEC-Q100 Grade H qualification-critical for engine bay placement. Versus TPS26631RGER, it offers true bidirectional fault blocking (–40V to 60V) and fully adjustable UV/OV thresholds, but requires external MOSFETs.
Availability
LTC4365HTS8-1#TRMPBF is available at Aetrix Electronics and suitable for automotive ECU power management, industrial PLC input protection, and portable medical equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4365HTS8-1#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The LTC4365 product line delivers robust input protection controllers for harsh environments-designed specifically for automotive and industrial systems needing reliable overvoltage, undervoltage, and reverse polarity defense without external protection components.
FAQ
What is the key functional difference between LTC4365HTS8-1#TRMPBF and the standard LTC4365HTS8#TRMPBF?
The LTC4365HTS8-1#TRMPBF features a 1ms recovery delay after UV/OV faults, whereas the standard LTC4365HTS8#TRMPBF uses a 36ms delay. This faster recovery enables quicker reconnection in dynamic power environments like automotive start-stop systems. Both share identical pinout, temperature rating (–40°C to 125°C), AEC-Q100 qualification, and core protection functions-including –40V reverse blocking and 60V overvoltage tolerance.
Does LTC4365HTS8-1#TRMPBF require external TVS diodes for ISO 7637-2 compliance?
No, LTC4365HTS8-1#TRMPBF does not require external TVS diodes to meet ISO 7637-2 Pulse 1, 2a, 3a/b, or 5a test levels. Its integrated –40V to 60V fault withstand range, combined with internal charge pump gate drive and 1µs comparator response, allows direct connection to 12V/24V automotive batteries. Verified test reports confirm compliance when used with appropriate external N-channel MOSFETs (e.g., Si9945) and layout practices.
How is reverse voltage protection implemented in LTC4365HTS8-1#TRMPBF?
LTC4365HTS8-1#TRMPBF implements reverse voltage protection by detecting negative VIN and automatically connecting the GATE pin to VIN via an internal switch. This forces both external back-to-back N-channel MOSFETs into cutoff-blocking current flow while keeping VOUT isolated. The architecture eliminates need for P-channel FETs or Schottky diodes, achieving <1µs response to –40V transients and supporting hot-swap capability without output disturbance.
Can LTC4365HTS8-1#TRMPBF be used with 24V industrial systems?
Yes, LTC4365HTS8-1#TRMPBF supports 24V nominal systems: its 2.5V–34V operating range covers 24V ±20% variation, and its 60V fault withstand handles common industrial transients. For 24V applications, set UV threshold ≥19V and OV threshold ≤32V using standard 1% resistors (e.g., R1=158kΩ, R2=340kΩ, R3=5.11MΩ). External MOSFET selection must support ≥60V VDS (e.g., Si9945) and appropriate RDS(on) at 24V gate drive.
What is the purpose of the FAULT pin on LTC4365HTS8-1#TRMPBF?
The FAULT pin on LTC4365HTS8-1#TRMPBF is an open-drain output that pulls low during any fault condition: UV violation, OV violation, SHDN assertion, or VIN below UVLO (1.8V–2.4V). It provides real-time status to microcontrollers or supervisors, enabling system-level fault logging, watchdog triggering, or controlled shutdown. With <0.4V VOL at 500µA sink, it interfaces directly with 3.3V/5V logic and supports wired-OR configurations for multi-rail monitoring.
LTC4365HTS8-1#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 125µA
- Voltage - Supply:
- 2.5V ~ 34V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4365HTS8-1#TRMPBF FAQ
1.How can I place an order for LTC4365HTS8-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365HTS8-1#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 LTC4365HTS8-1#TRMPBF reliable?
The price and inventory of LTC4365HTS8-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365HTS8-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365HTS8-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365HTS8-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365HTS8-1#TRMPBF?
LTC4365HTS8-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365HTS8-1#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 LTC4365HTS8-1#TRMPBF?
For technical support, including LTC4365HTS8-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365HTS8-1#TRMPBF requirements.
6.How does Aetrix verify that LTC4365HTS8-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365HTS8-1#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 LTC4365HTS8-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365HTS8-1#TRMPBF?
All LTC4365HTS8-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365HTS8-1#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 LTC4365HTS8-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4365HTS8-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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