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Analog Devices Inc. LTC4365HTS8#WTRMPBF
- Part No.:
- LTC4365HTS8#WTRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365HTS8#WTRMPBF.pdf
- Description:
- OVERVOLTAGE, UNDERVOLTAGE & REVE
- Quantity:
- Payment:
- Shipping:
Inventory:1,171
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Product details
Overview
LTC4365HTS8#WTRMPBF 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 125µA operating current, and features 36ms recovery delay. It is used in 12V automotive power rails to isolate loads from faulty battery or adapter connections.
For engineers reviewing the LTC4365HTS8#WTRMPBF datasheet, LTC4365HTS8#WTRMPBF pinout, LTC4365HTS8#WTRMPBF application, or LTC4365HTS8#WTRMPBF equivalent, key selection criteria include its AEC-Q100 qualification, TSOT-23 package with –40°C to 125°C operation, adjustable UV/OV thresholds via resistive dividers, reverse polarity blocking capability, and compatibility with dual N-channel MOSFETs such as Si9945.
Technical Context
The LTC4365HTS8#WTRMPBF integrates two precision comparators (0.5V threshold, 25mV hysteresis) for user-configurable UV and OV monitoring, a charge pump enabling gate drive up to 9.8V referenced to VOUT, and fast fault response with 1µs propagation delay. Its internal reverse-voltage monitor connects GATE to VIN when negative, ensuring automatic MOSFET turn-off during –40V events.
It implements a 36ms recovery timer after UV/OV faults to suppress line noise-induced chatter, supports gentle shutdown via 90µA GATE pull-down with VOUT tracking, and provides open-drain FAULT output asserting low on UV/OV violation, SHDN assertion, or VIN < 1.8V UVLO. The device requires no external TVS or input capacitor in most applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - powers from low-voltage battery systems up to industrial 24V rails without external regulation |
| Fault Withstand Range | –40V to 60V - survives reverse battery connection, load dump transients, and AC coupling without damage |
| UV/OV Threshold Accuracy | ±7.5mV at 0.5V reference - enables precise 5V–18V window setting with minimal resistor tolerance impact |
| Gate Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of standard logic-level N-channel MOSFETs even at low VIN |
| Recovery Delay Time | 36ms - prevents false reconnection during 50/60Hz ripple or transient noise on automotive inputs |
| Quiescent Current | 125µA typical - minimizes standby drain in always-on vehicle modules like telematics or ADAS sensors |
| Shutdown Current | 10µA - enables ultra-low-power sleep mode for battery-backed systems |
Pinout & Package
Package: 8-Lead Plastic TSOT-23, –40°C to 125°C ambient, exposed pad optional for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-channel MOSFET gate driver output | Charge-pump-enhanced output referenced to VOUT; pulls down to ~VOUT during fault, tracks VIN when VIN < 0V |
| VOUT | Output voltage sense reference | Sense node for load-side voltage; serves as charge pump return and defines GATE reference point |
| FAULT | Open-drain fault status indicator | Pulled low on UV/OV violation, SHDN assertion, or VIN < 1.8V; compatible with 5V/3.3V logic inputs |
| SHDN | Active-high enable/disable control | Drives internal charge pump on high; initiates gentle 90µA GATE pull-down on low |
| VIN | Input supply connection | Rugged input rated –40V to 60V; handles reverse polarity, load dump, and hot-swap transients |
| UV | Undervoltage comparator input | 0.5V falling threshold with 25mV hysteresis; accepts high-impedance resistive divider for window setting |
| OV | Overvoltage comparator input | 0.5V rising threshold with 25mV hysteresis; low leakage (<10nA) allows >1MΩ divider networks |
| GND | Device ground reference | Common return for all internal circuitry; exposed pad may be connected to PCB ground for thermal improvement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive under-hood environments (–40°C to 125°C), supporting ISO 16750-2 load dump and pulse testing |
| No TVS or input capacitor required | Internal robustness eliminates need for external surge suppression in most 12V/24V automotive designs |
| Adjustable UV/OV thresholds | Configurable via external resistor dividers - enables custom protection windows (e.g., 5V–18V for 12V nominal) |
| Reverse supply protection | Automatic GATE-to-VIN connection during negative VIN isolates load without external diodes or P-MOSFETs |
| Gentle shutdown behavior | 90µA controlled GATE discharge with VOUT tracking reduces dI/dt-induced voltage spikes across parasitic inductance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Node Input Conditioning |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS ECUs from battery reversal, jump-start surges, and alternator load dump transients. IC Role / Device Role / Timing Role: Input fault protection controller that gates power delivery using external dual N-channel MOSFETs. Use Value: Enables use of low-RDS(on) N-MOSFETs instead of lossy Schottky diodes, reducing voltage drop and heat generation by >80% vs. discrete solutions. | Use Scenario: Securing remote I/O modules powered from unregulated 24V factory wiring subject to brownouts and induced transients. IC Role / Device Role / Timing Role: Precision window comparator and gate driver ensuring only valid input voltages reach downstream regulators and microcontrollers. Use Value: Eliminates need for separate UVLO IC, overvoltage supervisor, and reverse-polarity circuit - consolidating three functions into one 3mm × 1.7mm TSOT-23 device. |
| Laptop Adapter Input Protection | Portable Medical Instrument Power Management |
Use Scenario: Safeguarding USB-C PD-powered portable workstations against incorrect AC adapters or damaged cables delivering reversed or overvoltage outputs. IC Role / Device Role / Timing Role: Fault-tolerant front-end controller managing back-to-back N-MOSFETs to block invalid inputs before they reach buck converters. Use Value: Achieves <100mV conduction loss at 3A (vs. >300mV with P-MOSFET solutions), extending battery runtime and reducing thermal stress on PCB layout. | Use Scenario: Ensuring reliable operation of handheld ultrasound or glucose monitors powered from replaceable Li-ion packs prone to deep discharge or accidental polarity reversal. IC Role / Device Role / Timing Role: Dual-threshold protection supervisor with integrated gate drive, providing fail-safe isolation during battery swap or charger misconnection. Use Value: Guarantees <10µA shutdown current and 125µA active current - critical for multi-week battery life in always-ready diagnostic devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26631RGER | Integrated 60V protected switch with fixed 3.5V UVLO and 36V OVLO; no adjustable thresholds; 1.2A max continuous current | Best suited for space-constrained 5V/12V systems requiring simple on/off control without window tuning | Select TPS26631RGER when design prioritizes BOM count reduction over flexible voltage window configuration |
| MAX14579ETA+ | USB port protection IC with integrated 5.5V overvoltage clamp and 2.7V undervoltage lockout; lacks reverse polarity support and external MOSFET drive | Targeted at USB-powered peripherals needing basic overvoltage clamping, not full rail isolation | Select MAX14579ETA+ only for USB Type-A/B host ports where reverse protection is handled upstream |
Compared with TPS26631RGER and MAX14579ETA+, the LTC4365HTS8#WTRMPBF uniquely combines AEC-Q100 qualification, fully adjustable UV/OV thresholds, reverse polarity blocking, and external N-MOSFET drive - making it the only option capable of protecting high-current automotive loads across –40V to 60V fault conditions while maintaining <125µA quiescent draw.
Availability
LTC4365HTS8#WTRMPBF is available at Aetrix Electronics and suitable for automotive ECU power management, industrial sensor interface conditioning, and portable medical instrument input protection requiring stable component supply across extended temperature ranges.
Supply support for LTC4365HTS8#WTRMPBF 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 rugged, low-quiescent-current protection controllers for harsh-input environments - designed specifically for automotive, industrial, and portable equipment where reliability under voltage fault conditions is non-negotiable.
FAQ
What is the maximum fault voltage the LTC4365HTS8#WTRMPBF can withstand without damage?
The LTC4365HTS8#WTRMPBF has an absolute maximum rating of –40V to 60V on the VIN pin. This means it can survive reverse battery connection (–40V), 12V system load dump transients (up to 60V), and accidental AC coupling without latch-up or permanent damage. Operation remains within specification between 2.5V and 34V, but the device's rugged input structure sustains these extreme fault conditions safely.
Does the LTC4365HTS8#WTRMPBF require external components for basic overvoltage and undervoltage protection?
No, the LTC4365HTS8#WTRMPBF does not require external TVS diodes or input capacitors for most applications. Its internal comparators, charge pump, and fault timers provide complete UV/OV window detection and gate control. Only two external resistors per threshold (UV/OV) and a pair of N-channel MOSFETs are needed to implement full protection - significantly reducing BOM count versus discrete solutions.
How does the LTC4365HTS8#WTRMPBF handle reverse supply voltage conditions?
The LTC4365HTS8#WTRMPBF detects negative VIN via an internal comparator and automatically connects the GATE pin to VIN. This forces both external back-to-back N-channel MOSFETs into cutoff, blocking reverse current flow while keeping VOUT near ground. Unlike solutions requiring external P-MOSFETs or diodes, this method achieves near-zero forward voltage drop during normal operation and full isolation during –40V faults.
What is the purpose of the 36ms recovery delay in the LTC4365HTS8#WTRMPBF?
The 36ms recovery delay in the LTC4365HTS8#WTRMPBF prevents chattering during noisy input conditions - especially 50Hz/60Hz line ripple or automotive alternator noise. After a UV or OV fault clears, the device waits 36ms before re-enabling the external MOSFETs, ensuring the input remains stably within the programmed window. This eliminates repeated on/off cycling that could damage downstream circuitry or cause system resets.
Is the LTC4365HTS8#WTRMPBF pin-compatible with the LTC4365-1 variant?
No, the LTC4365HTS8#WTRMPBF is not pin-compatible with LTC4365-1 variants. While both share identical pinout and package (TSOT-23), the LTC4365-1 substitutes the standard 36ms recovery delay with a 1ms delay - a functional difference requiring verification of timing-critical system behavior. The part number suffix "-1" denotes this variant; LTC4365HTS8#WTRMPBF is the standard-recovery version and must be selected explicitly for applications requiring the full 36ms debounce interval.
LTC4365HTS8#WTRMPBF 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4365HTS8#WTRMPBF FAQ
1.How can I place an order for LTC4365HTS8#WTRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365HTS8#WTRMPBF 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#WTRMPBF reliable?
The price and inventory of LTC4365HTS8#WTRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365HTS8#WTRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365HTS8#WTRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365HTS8#WTRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365HTS8#WTRMPBF?
LTC4365HTS8#WTRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365HTS8#WTRMPBF 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#WTRMPBF?
For technical support, including LTC4365HTS8#WTRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365HTS8#WTRMPBF requirements.
6.How does Aetrix verify that LTC4365HTS8#WTRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365HTS8#WTRMPBF 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#WTRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365HTS8#WTRMPBF?
All LTC4365HTS8#WTRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365HTS8#WTRMPBF, 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#WTRMPBF part is unused and in its original packaging.
Return procedure for LTC4365HTS8#WTRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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