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Analog Devices Inc. LTC4365ITS8#TRMPBF
- Part No.:
- LTC4365ITS8#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC4365ITS8#TRMPBF.pdf
- Description:
- IC OVERVOLTAGE PROT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,355
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Product details
Overview
LTC4365ITS8#TRMPBF from Analog Devices is an overvoltage, undervoltage, and reverse supply protection controller for 2.5V–34V input systems. It controls external N-channel MOSFETs to block faults up to –40V and +60V, delivers 9.8V gate enhancement, consumes 125µA operating current, and features 36ms recovery delay-used in automotive surge protection, industrial automation, and portable instrumentation.
For engineers reviewing the LTC4365ITS8#TRMPBF datasheet, LTC4365ITS8#TRMPBF pinout, LTC4365ITS8#TRMPBF application, or LTC4365ITS8#TRMPBF equivalent, key selection criteria include its –40°C to +85°C temperature grade, TSOT-23 package, adjustable UV/OV thresholds via resistive dividers, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC4365ITS8#TRMPBF integrates dual precision comparators (0.5V threshold, 25mV hysteresis) for UV and OV monitoring, a charge pump delivering up to 9.8V gate drive referenced to VOUT, and fast fault response with 1µs propagation delay. Its GATE output supports gentle shutdown (250µs turn-off delay) and fast turn-off (4µs), while reverse protection automatically connects GATE to VIN when negative voltage is detected.
It operates across –40°C to +85°C, withstands –40V to +60V at VIN, and uses internal logic to enforce 36ms power-good window validation before enabling the external MOSFETs-blocking 50Hz/60Hz AC transients and debouncing live connections.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - powers from low-voltage battery rails up to industrial 24V supplies without external regulation. |
| Protection Range | –40V to +60V - survives reverse battery connection, load dump spikes, and AC line coupling without damage. |
| Gate Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of standard N-channel MOSFETs even at low VIN (e.g., 5V). |
| Quiescent Current | 125µA typical - enables always-on protection in battery-powered systems with minimal standby drain. |
| Recovery Delay | 36ms - filters line noise and prevents chattering during transient overvoltage/undervoltage events. |
| UV/OV Threshold Accuracy | ±1.5% (500mV ±7.5mV) - enables precise, stable trip points using high-value resistor dividers with <10nA leakage. |
| Shutdown Current | 10µA - reduces system power loss when disabled via SHDN pin. |
Pinout & Package
Package: 8-Lead Plastic TSOT-23, –40°C to +85°C operating range, exposed pad optional for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-channel MOSFET gate driver output | Charge-pump-driven output referenced to VOUT; pulls down rapidly on fault or shutdown, tracks VOUT during gentle turn-off. |
| VOUT | Output voltage sense reference | Senses voltage at load side of external MOSFETs; serves as charge pump return and defines GATE drive reference point. |
| FAULT | Open-drain fault status indicator | Pulled low during UV/OV fault, SHDN assertion, or VIN below UVLO (1.8V); compatible with 5V logic inputs. |
| SHDN | Enable/disable control input | Active-high; enables gate charge pump when >0.75V, places device in 10µA shutdown when <0.4V. |
| VIN | Input supply voltage terminal | Withstands –40V to +60V; powers internal circuitry and provides input for UV/OV comparators. |
| UV | Undervoltage comparator input | 0.5V falling threshold; connects to resistive divider to set custom low-voltage cutoff (e.g., 5V). |
| OV | Overvoltage comparator input | 0.5V rising threshold; connects to resistive divider to set custom high-voltage cutoff (e.g., 18V). |
| GND | Device ground reference | Primary ground return for internal circuitry and comparator references; exposed pad may be connected here. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV thresholds | Set via external resistor dividers with ±1.5% accuracy and <10nA input leakage-enables precise, application-specific voltage windows without trimming. |
| Reverse supply protection | Automatic GATE-to-VIN connection when VIN < 0V-blocks –40V reverse polarity without diodes or P-MOSFETs, preserving low forward drop. |
| Charge pump gate drive | Delivers up to 9.8V enhancement above VOUT-ensures robust N-MOSFET conduction even at 2.5V input, eliminating need for external boost. |
| Gentle shutdown | 90µA controlled GATE pull-down with VOUT tracking-limits dI/dt, suppresses inductive voltage spikes, and avoids load disruption during disable. |
| No input capacitor or TVS required | Internal 36ms recovery timer and 60V absolute max rating-eliminates external surge suppression components in most 12V/24V automotive and industrial designs. |
Applications
| Automotive Surge Protection | Industrial Automation Power Input |
|---|---|
Use Scenario: Protecting ECUs and telematics modules from ISO 7637-2 load dump (up to +120V transient) and reverse battery connection in 12V vehicle systems. IC Role / Device Role / Timing Role: Fault protection controller that isolates downstream circuitry by disabling external N-MOSFETs within 1µs of overvoltage detection and enforcing 36ms re-enable delay. Use Value: Enables direct connection to vehicle battery without TVS diodes or series diodes-reducing BOM cost and forward voltage drop while meeting AEC-Q100 Grade 3 requirements. | Use Scenario: Securing PLC I/O modules and sensor interfaces against field-wiring errors, such as misconnected 24V DC supplies or accidental AC coupling. IC Role / Device Role / Timing Role: Input supervisor that monitors VIN for sustained overvoltage (>30V), undervoltage (<18V), or polarity reversal, then disables power path via back-to-back N-MOSFETs. Use Value: Prevents catastrophic failure of sensitive analog front-ends and microcontrollers during commissioning or maintenance-no redesign needed for varying site power conditions. |
| Portable Instrumentation Power Management | Laptop Docking Station Protection |
Use Scenario: Safeguarding handheld test equipment powered by interchangeable AC adapters (5V, 9V, 12V, 15V) and Li-ion batteries subject to deep discharge or reverse insertion. IC Role / Device Role / Timing Role: Dual-threshold supervisor that enforces user-defined safe input range (e.g., 4.5V–15.5V) and blocks reverse battery connection via automatic GATE clamping. Use Value: Eliminates need for Schottky OR-ing diodes and discrete UVLO circuits-reducing heat generation and enabling compact, battery-efficient form factors. | Use Scenario: Protecting USB-C docking stations from faulty third-party chargers delivering incorrect voltages (e.g., 20V instead of 15V) or reversed polarity during hot-plug events. IC Role / Device Role / Timing Role: Hot-swap controller that validates input voltage window before enabling power delivery to host laptop, with 36ms debounce to reject contact bounce and ESD-induced glitches. Use Value: Prevents latch-up and permanent damage to USB PD controllers and display interface ICs-ensuring field reliability without requiring end-user voltage verification. |
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 internal MOSFETs; fixed 3.5V–36V operating range; no adjustable UV/OV thresholds. | Used where board space is critical and fixed protection limits suffice-lacks resistor-programmable flexibility of LTC4365ITS8#TRMPBF. | Select TPS26631RGER for simplified layout and lower component count when UV/OV thresholds do not require tuning. |
| MAX14522ETA+ | 36V-rated OVP/UVLO controller with 1.2V fixed UV threshold and 6.5V fixed OV threshold; no reverse polarity protection. | Targeted at consumer electronics with narrow input ranges-cannot replace LTC4365ITS8#TRMPBF in automotive or industrial reverse-protection use cases. | Choose MAX14522ETA+ only for cost-sensitive, non-reverse applications where fixed thresholds align with system requirements. |
Compared with TPS26631RGER and MAX14522ETA+, the LTC4365ITS8#TRMPBF uniquely combines programmable UV/OV thresholds, –40V reverse protection, and gate drive optimization for external N-MOSFETs-making it the only option supporting wide-range, polarity-agnostic, and field-configurable input protection in TSOT-23.
Availability
LTC4365ITS8#TRMPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial automation power input, and portable instrumentation requiring stable component supply across extended temperature operation.
Supply support for LTC4365ITS8#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 industrial, automotive, communications, and healthcare markets.
The LTC4365 product line delivers rugged, precision input protection controllers for harsh environments-designed specifically to replace discrete diode/MOSFET solutions with integrated, AEC-Q100-qualified ICs for automotive and industrial power entry.
FAQ
What is the operating temperature range of the LTC4365ITS8#TRMPBF?
The LTC4365ITS8#TRMPBF is rated for –40°C to +85°C ambient operation, matching the Industrial temperature grade. This range is confirmed in the manufacturer's ordering information table and supported by electrical characteristics tested across this full span-including UV/OV threshold accuracy, gate drive voltage, and quiescent current.
Does the LTC4365ITS8#TRMPBF provide reverse polarity protection?
Yes, the LTC4365ITS8#TRMPBF provides active reverse supply protection down to –40V. When VIN goes negative, its internal reverse monitor connects the GATE pin directly to VIN, turning off the external back-to-back N-channel MOSFETs. This function is documented in the PIN FUNCTIONS section and verified in Figure 7 and Figure 8 of the datasheet.
Can the UV and OV thresholds of the LTC4365ITS8#TRMPBF be adjusted?
Yes, both UV and OV thresholds are fully adjustable using external resistor dividers connected to the UV and OV pins. The internal comparators have precise 0.5V reference thresholds with 25mV hysteresis, and the datasheet provides a three-step design procedure (page 11) to calculate R1/R2/R3 values for target trip points like 5V UV and 18V OV.
What package type does the LTC4365ITS8#TRMPBF use?
The LTC4365ITS8#TRMPBF uses an 8-Lead Plastic TSOT-23 package with marking code LTFKT. This is explicitly listed in the ORDER INFORMATION table on page 2 of the datasheet, and the pin configuration diagram (page 2) confirms the TS8 top view layout with GATE–VOUT–FAULT–SHDN–VIN–UV–OV–GND order.
How does the LTC4365ITS8#TRMPBF handle fault recovery after overvoltage or undervoltage events?
The LTC4365ITS8#TRMPBF enforces a 36ms recovery delay before re-enabling the external MOSFETs after UV or OV faults clear. This timeout is hard-coded and prevents chattering due to line noise or transient excursions. The FAULT pin remains low until both the input returns to the valid window and the 36ms timer expires-verified in Figures 5 and 6 and specified in the ELECTRICAL CHARACTERISTICS table as tRECOVERY.
LTC4365ITS8#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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC4365ITS8#TRMPBF FAQ
1.How can I place an order for LTC4365ITS8#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365ITS8#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 LTC4365ITS8#TRMPBF reliable?
The price and inventory of LTC4365ITS8#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4365ITS8#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365ITS8#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365ITS8#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365ITS8#TRMPBF?
LTC4365ITS8#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365ITS8#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 LTC4365ITS8#TRMPBF?
For technical support, including LTC4365ITS8#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365ITS8#TRMPBF requirements.
6.How does Aetrix verify that LTC4365ITS8#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365ITS8#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 LTC4365ITS8#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365ITS8#TRMPBF?
All LTC4365ITS8#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365ITS8#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 LTC4365ITS8#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4365ITS8#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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