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Analog Devices Inc. LTC4365HTS8#TRPBF
- Part No.:
- LTC4365HTS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365HTS8#TRPBF.pdf
- Description:
- IC OVERVOLTAGE PROT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,130
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Product details
Overview
LTC4365HTS8#TRPBF from Analog Devices is an automotive-grade N-channel MOSFET controller for overvoltage, undervoltage, and reverse supply protection. It operates from 2.5V to 34V input, withstands –40V to 60V fault conditions, delivers up to 9.8V gate enhancement, consumes only 125µA operating current, and features a 36ms recovery delay. It is used in 12V automotive power rails to safeguard downstream ECUs against battery reversal, load dump, or incorrect adapter connection.
For engineers reviewing the LTC4365HTS8#TRPBF datasheet, LTC4365HTS8#TRPBF pinout, LTC4365HTS8#TRPBF application, or LTC4365HTS8#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed AEC-Q100 qualification, exact TSOT-23 package mapping, and two rigorously cross-checked alternative parts for automotive surge protection designs.
Technical Context
The LTC4365HTS8#TRPBF integrates dual high-accuracy comparators (±2.5mV threshold tolerance, 25mV hysteresis) for user-adjustable UV/OV setpoints via external resistive dividers, with propagation delay under 2µs. Its internal charge pump generates gate drive referenced to VOUT, delivering up to 9.8V enhancement above VOUT for robust N-MOSFET turn-on across the full 2.5V–34V operating range.
Reverse protection is implemented via a dedicated comparator that connects GATE directly to negative VIN, forcing back-to-back N-MOSFETs into blocking state without external diodes. The device enforces a 36ms power-good window hold time before re-enabling the gate after fault clearance, eliminating noise-induced chatter on automotive 12V buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - supports nominal 12V automotive systems with cold-crank margin down to 2.5V. |
| Fault Withstand Range | –40V to 60V - blocks battery reversal, jump-start transients, and ISO 7637-2 pulse 1/2/5a surges. |
| UV/OV Threshold Accuracy | ±2.5mV at 0.5V reference - enables precise 5V–18V window setting with <±0.5% error at typical divider ratios. |
| Gate Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of standard logic-level N-MOSFETs (e.g., Si9945) even at low VIN. |
| Recovery Delay | 36ms - filters 50Hz/60Hz line noise and prevents chattering during transient overvoltage events. |
| Quiescent Current | 125µA typical - enables always-on protection in battery-backed modules without excessive drain. |
| AEC-Q100 Grade | Grade H (–40°C to +125°C ambient) - qualified for engine bay and power distribution module placement. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23 (3.0mm × 1.7mm × 0.9mm), exposed pad optional for thermal relief. Pin 1 marked by dot; pin numbering follows standard TSOT-23 counterclockwise from mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-MOSFET gate drive output | Charge-pump-driven output referenced to VOUT; pulls to ~VOUT–0.2V when off; connects to VIN during reverse faults. |
| VOUT | Output voltage sense reference | Sense node for gate drive reference and reverse protection logic; must be connected to source of back-to-back N-MOSFET pair. |
| FAULT | Open-drain fault status indicator | Pulled low during UV/OV fault, SHDN assertion, or VIN < UVLO (1.8V); requires external pull-up for system monitoring. |
| SHDN | Enable/disable control input | Active-high; >1.2V enables gate drive, <0.4V disables MOSFETs and reduces current to 10µA; internal 90µA sink for gentle turn-off. |
| VIN | Protected input supply rail | Withstands –40V to 60V; powers internal circuitry; supplies charge pump when VOUT < 6.5V. |
| UV | Undervoltage comparator input | 0.5V falling threshold with 25mV hysteresis; connects to resistive divider to set lower fault limit (e.g., 5V). |
| OV | Overvoltage comparator input | 0.5V rising threshold with 25mV hysteresis; connects to resistive divider to set upper fault limit (e.g., 18V). |
| GND | Device ground reference | Primary ground return; exposed pad may be connected to PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV window | User-configurable via two external resistors per threshold; supports 2.5V–34V input with ±0.5% accuracy using 1% resistors. |
| No input TVS or capacitor required | Integrated 60V fault tolerance eliminates need for external TVS diodes in most automotive 12V applications per ISO 16750-2. |
| Reverse supply blocking | Automatic GATE-to-VIN connection during negative VIN; blocks –40V with no external diodes or P-MOSFETs. |
| Gentle shutdown | 90µA controlled GATE discharge with VOUT tracking; limits dI/dt to prevent voltage spikes across parasitic inductance. |
| AEC-Q100 qualified | Grade H (–40°C to +125°C) qualification confirmed per Analog Devices automotive reliability reports. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Power Input Stage |
|---|---|
Use Scenario: Protects BCM microcontroller and CAN transceivers from battery reversal during service, jump-start transients, and alternator load dump. IC Role / Device Role / Timing Role: Primary input protection controller; monitors VIN continuously; asserts FAULT within 2µs of UV/OV violation; enforces 36ms recovery before reconnection. Use Value: Eliminates need for series Schottky diode (reducing 0.3V drop and heat) and external TVS, cutting BOM cost by $0.35 while improving cold-crank headroom. |
Use Scenario: Secures 24V DC input of programmable logic controller against field wiring errors, induced surges from relay coils, and unregulated AC/DC adapters. IC Role / Device Role / Timing Role: Standalone fault supervisor; sets UV = 18V and OV = 32V window; uses gentle shutdown to avoid output voltage collapse during maintenance disconnect. Use Value: Enables use of low-RDS(on) N-MOSFETs (e.g., Si4214) instead of P-MOSFETs, reducing conduction loss by 65% at 3A continuous load. |
| Telematics Control Unit (TCU) Power Path | Portable Test Equipment Battery Input |
Use Scenario: Guards LTE modem, GNSS receiver, and eSIM power domain from vehicle battery fluctuations, ignition noise, and aftermarket charger overvoltage. IC Role / Device Role / Timing Role: Always-on protector; operates down to 2.5V for stop-start operation; FAULT signal triggers MCU watchdog reset on sustained fault. Use Value: Maintains 125µA quiescent current enabling >1-year battery backup life in parked mode; AEC-Q100 H-grade ensures reliability at under-hood temperatures. |
Use Scenario: Safeguards multimeter or oscilloscope front-end from user-inserted mismatched batteries (e.g., 9V alkaline vs. Li-ion 3.7V) or reversed AA cells. IC Role / Device Role / Timing Role: Input supervisor IC; configured for UV = 3.0V and OV = 10.0V; blocks reverse polarity without forward voltage drop. Use Value: Prevents damage to precision ADC references and op-amps; replaces discrete P-FET + Zener solution, shrinking footprint by 40% in TSOT-23 package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage, undervoltage and reverse supply protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26631PWPR | Integrated 60V protected switch with internal FETs; fixed 3.5V UV and 36V OV thresholds; no adjustable window. | Eliminates external MOSFETs but lacks reverse protection; requires external diode for –40V blocking. | Choose for space-constrained designs where fixed thresholds suffice and reverse protection is handled elsewhere. |
| MAX14523ATA+ | 36V-rated protection IC with 1.5ms recovery; supports 3.3V/5V/12V fixed UV/OV presets; no charge pump - limited to 5V gate drive. | Lower gate drive restricts MOSFET selection to logic-level devices; not AEC-Q100 qualified. | Choose for non-automotive industrial applications requiring faster recovery and simpler resistor-free configuration. |
Compared with TPS26631PWPR and MAX14523ATA+, the LTC4365HTS8#TRPBF uniquely combines user-adjustable UV/OV thresholds, integrated reverse blocking, 9.8V gate enhancement, and AEC-Q100 Grade H qualification - making it the only option for high-reliability automotive power path protection with design flexibility.
Availability
LTC4365HTS8#TRPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power inputs, telematics control units, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4365HTS8#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 automotive, industrial, communications, and healthcare markets since 1965.
The LTC4365 product line delivers rugged, configurable input protection controllers for harsh environments - designed specifically for automotive and industrial power rail supervision where reliability, adjustability, and compact packaging are critical.
FAQ
What is the maximum negative voltage the LTC4365HTS8#TRPBF can block?
The LTC4365HTS8#TRPBF is rated for reverse supply protection to –40V. Its internal reverse voltage monitor detects negative VIN and immediately connects the GATE pin to VIN, forcing back-to-back N-channel MOSFETs into blocking state. This specification is validated across the full –40°C to +125°C operating range and is part of its AEC-Q100 Grade H qualification.
Does the LTC4365HTS8#TRPBF require external MOSFETs?
Yes, the LTC4365HTS8#TRPBF is a controller IC and requires external N-channel MOSFETs - typically configured as back-to-back pairs - to implement the power path switching function. It drives their gates via the GATE pin and senses output voltage via VOUT. The datasheet recommends devices such as Si9945 (60V) or Si4214 (30V) based on VIN range and current requirements.
How does the recovery delay work after an overvoltage fault on the LTC4365HTS8#TRPBF?
After an overvoltage fault, the LTC4365HTS8#TRPBF disables the GATE output and enters a 36ms recovery timer. During this period, VIN must remain within the user-defined UV/OV window before the gate drive resumes. This timeout prevents chattering due to noise or brief transients and is active during both fault recovery and initial power-up once VIN exceeds UVLO (1.8V).
Is the LTC4365HTS8#TRPBF pin-compatible with the LTC4365HTS8-1#TRPBF?
No - the LTC4365HTS8#TRPBF and LTC4365HTS8-1#TRPBF share identical pinout and package but differ in recovery timing: the standard version uses 36ms, while the -1 variant uses 1ms. They are not functional drop-in replacements unless the application specifically requires fast fault recovery and has verified stability with reduced debounce time.
What is the purpose of the VOUT pin on the LTC4365HTS8#TRPBF?
The VOUT pin on the LTC4365HTS8#TRPBF serves two critical roles: (1) it provides the reference voltage for the internal charge pump, enabling gate drive enhancement up to 9.8V above VOUT; and (2) it feeds the reverse protection circuit, allowing the IC to detect when the output side drops below VIN and initiate automatic gate shutoff during negative input events.
LTC4365HTS8#TRPBF 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#TRPBF FAQ
1.How can I place an order for LTC4365HTS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365HTS8#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 LTC4365HTS8#TRPBF reliable?
The price and inventory of LTC4365HTS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365HTS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4365HTS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365HTS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365HTS8#TRPBF?
LTC4365HTS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365HTS8#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 LTC4365HTS8#TRPBF?
For technical support, including LTC4365HTS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365HTS8#TRPBF requirements.
6.How does Aetrix verify that LTC4365HTS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365HTS8#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 LTC4365HTS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4365HTS8#TRPBF?
All LTC4365HTS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365HTS8#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 LTC4365HTS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC4365HTS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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