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Analog Devices Inc. LTC4365IDDB-1#TRMPBF
- Part No.:
- LTC4365IDDB-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4365IDDB-1#TRMPBF.pdf
- Description:
- IC OVERVOLTAGE PROTECT 8-DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,119
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Product details
Overview
LTC4365IDDB-1#TRMPBF 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, features 1ms fast recovery after UV/OV faults, and delivers up to 9.8V gate enhancement to external dual N-MOSFETs-enabling robust protection in 12V automotive power rails.
For engineers reviewing the LTC4365IDDB-1#TRMPBF datasheet, LTC4365IDDB-1#TRMPBF pinout, LTC4365IDDB-1#TRMPBF application, or LTC4365IDDB-1#TRMPBF equivalent, this device is selected for high-reliability automotive surge protection, industrial hot-swap interfaces, and portable instrumentation where precise windowed voltage supervision and reverse polarity blocking are required.
Technical Context
The LTC4365IDDB-1#TRMPBF integrates two precision 0.5V comparators with 25mV hysteresis for UV and OV monitoring, each with <1µs propagation delay and ±10nA leakage. Its charge pump drives the GATE pin referenced to VOUT, delivering up to 9.8V enhancement above VOUT for reliable N-MOSFET turn-on across the full 2.5V–34V operating range.
Unlike the standard LTC4365, the -1 variant replaces the 36ms recovery timer with a 1ms delay, enabling rapid reconnection after transient faults while maintaining identical comparator thresholds, shutdown behavior, and reverse protection logic-including automatic GATE-to-VIN connection during negative VIN events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 34V - supports nominal 3.3V, 5V, 12V, and 24V systems without level-shifting |
| Fault Protection Range | –40V to +60V - blocks reverse battery installation, load dump spikes, and AC line transients |
| UV/OV Threshold Accuracy | ±1.5% (500mV ±7.5mV) - enables stable 5V–18V power-good windows with minimal resistor tolerance dependence |
| Recovery Delay Time | 1ms (LTC4365-1 variant) - eliminates output chatter during brief line noise or dip events |
| Quiescent Current | 125µA typical - enables always-on protection in battery-backed systems without excessive drain |
| Shutdown Current | 10µA - allows deep sleep mode during system standby with no external biasing |
| Gate Drive Enhancement | Up to 9.8V above VOUT - ensures full enhancement of common 3V-threshold N-MOSFETs at low VIN |
Pinout & Package
Package: 8-Lead (3mm × 2mm) Plastic DFN with exposed pad (pin 9), rated for –40°C to +85°C ambient operation and qualified per AEC-Q100 Grade 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary ground return for internal regulators, comparators, and fault logic; exposed pad must be connected to PCB ground for thermal and EMI performance |
| OV | Overvoltage Comparator Input | Accepts resistive divider to set rising-edge trip point at 0.5V; 25mV hysteresis prevents oscillation near threshold |
| UV | Undervoltage Comparator Input | Accepts resistive divider to set falling-edge trip point at 0.5V; same hysteresis and leakage specs as OV |
| VIN | Input Supply Terminal | Rugged input rated –40V to +60V; connects directly to source of back-to-back N-MOSFETs; senses reverse polarity |
| SHDN | Shutdown Control Input | Active-low enable; pulls GATE low via 90µA sink when asserted; places IC in 10µA shutdown state |
| FAULT | Fault Status Output | Open-drain output pulled low on UV/OV fault, SHDN assertion, or VIN < UVLO (1.8V–2.4V) |
| VOUT | Output Sense Reference | Senses voltage at load side of MOSFETs; serves as reference for charge pump and GATE drive voltage |
| GATE | N-MOSFET Gate Driver | Charge-pump-driven output referenced to VOUT; provides up to 9.8V enhancement; tracks VIN during reverse faults |
Key Features
| Feature | Design Value |
|---|---|
| 1ms Fast Recovery Timer | Enables immediate reconnection after transient overvoltage or undervoltage events-critical for automotive infotainment and ADAS modules requiring uninterrupted power |
| Reverse Supply Blocking | Automatically connects GATE to negative VIN, turning off back-to-back N-MOSFETs within microseconds-eliminates need for series Schottky diodes or P-MOSFETs |
| No External TVS or Input Capacitor Required | Withstands 60V transients and filters 50/60Hz AC without external clamping or bulk capacitance-reduces BOM count and board area in space-constrained designs |
| Adjustable UV/OV Window | Configurable via two external resistors per threshold; ±10nA input leakage enables use of >2MΩ dividers-minimizing quiescent current in divider network |
| AEC-Q100 Qualified | Rated for –40°C to +85°C operation with full automotive reliability testing-approved for engine control, body electronics, and telematics applications |
Applications
| Automotive Power Rail Protection | Industrial Hot-Swap Interface |
|---|---|
|
Use Scenario: Protecting infotainment head units from 12V battery reverse connection, load dump (ISO 7637-2 Pulse 5a), and alternator overvoltage. IC Role / Device Role / Timing Role: Acts as intelligent gate controller for dual N-MOSFETs placed between battery and downstream DC/DC converters-monitors VIN continuously and asserts GATE low within 2µs of fault detection. Use Value: Eliminates need for 40V-rated P-MOSFETs or series diodes, reducing conduction loss by >70% versus diode-based solutions while meeting ISO 16750-2 requirements. |
Use Scenario: Safely inserting/replacing field I/O modules in programmable logic controllers (PLCs) powered from shared 24V backplane. IC Role / Device Role / Timing Role: Provides controlled MOSFET turn-on/off sequencing and real-time voltage window enforcement-prevents bus fault propagation during live insertion. Use Value: Enables zero-downtime maintenance with 1ms recovery ensuring uninterrupted communication on Modbus RTU or CANopen networks during module swaps. |
| Portable Medical Instrumentation | Laptop Battery Management System |
|
Use Scenario: Securing handheld ultrasound or glucose meters against accidental AC adapter misconnection or depleted battery undervoltage. IC Role / Device Role / Timing Role: Supervises dual-input power path (AC adapter + Li-ion) using SHDN-controlled priority selection and UV/OV windowing-blocks invalid inputs before they reach analog front-end. Use Value: Prevents sensor damage and data corruption by enforcing strict 4.5V–5.5V USB compliance and rejecting <3.0V battery states before brownout resets occur. |
Use Scenario: Isolating main system rail from defective or counterfeit replacement batteries that exhibit out-of-spec charging voltages or polarity reversal. IC Role / Device Role / Timing Role: Sits between battery connector and system PMIC; uses reverse protection and 60V fault tolerance to block reverse-charged cells and overvoltage charging attempts. Use Value: Extends battery life and prevents thermal runaway by cutting off faulty cells within 1ms-meeting UL 62368-1 Annex H arc-fault response requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel MOSFET controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26631RGER | Integrated 60V eFuse with current limiting; no adjustable UV/OV window; fixed 3.5ms fault response | Better suited for constant-current load protection; lacks reverse polarity blocking and precise windowed supervision | Select when overcurrent protection dominates requirement; avoid if reverse battery or custom UV/OV thresholds are needed |
| MAX14749ETA+T | 36V-rated, 1.2ms recovery, but only supports 0°C to +70°C; no AEC-Q100 qualification; lower gate drive (7.5V) | Targeted at commercial portable equipment-not validated for automotive temperature cycling or vibration | Acceptable for cost-sensitive consumer devices; reject for automotive or industrial deployments requiring extended temp range and reliability certification |
Compared with TPS26631RGER and MAX14749ETA+T, the LTC4365IDDB-1#TRMPBF uniquely combines AEC-Q100 qualification, true bidirectional reverse blocking, user-adjustable UV/OV thresholds, and 1ms recovery-making it the only option for automotive-grade, windowed-supervision applications demanding both precision and ruggedness.
Availability
LTC4365IDDB-1#TRMPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial hot-swap interfaces, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4365IDDB-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 industrial, automotive, communications, and healthcare markets with precision power, sensing, and protection solutions.
The LTC4365 family was designed specifically for high-reliability input protection in automotive and industrial systems-delivering integrated overvoltage, undervoltage, and reverse polarity supervision with minimal external components and guaranteed AEC-Q100 compliance.
FAQ
What is the key functional difference between LTC4365IDDB-1#TRMPBF and the standard LTC4365IDDB#TRMPBF?
The LTC4365IDDB-1#TRMPBF features a 1ms recovery delay after UV or OV faults, whereas the standard LTC4365IDDB#TRMPBF uses a 36ms delay. All other specifications-including UV/OV threshold accuracy, gate drive capability, reverse protection behavior, and temperature rating-are identical. This makes LTC4365IDDB-1#TRMPBF ideal for applications requiring rapid reconnection after brief transients, such as automotive infotainment or real-time industrial control loops.
Does LTC4365IDDB-1#TRMPBF require external TVS diodes or input capacitors for ISO 7637-2 compliance?
No. The LTC4365IDDB-1#TRMPBF withstands 60V transients and blocks 50Hz/60Hz AC power without external TVS diodes or bulk input capacitors in most automotive applications. Its internal architecture-combined with the ability to drive robust N-MOSFETs-meets ISO 7637-2 Pulse 1, 2a, 3a, and 3b requirements when paired with appropriate MOSFETs like Si9945 or Si4214, as confirmed in Analog Devices' application notes.
How does LTC4365IDDB-1#TRMPBF implement reverse supply protection without external components?
The LTC4365IDDB-1#TRMPBF detects negative VIN via an internal comparator and automatically connects the GATE pin to VIN through an internal switch. This pulls the gate of the downstream N-MOSFET below its source, forcing it into cutoff. The topology requires back-to-back N-MOSFETs but needs no external diodes, P-MOSFETs, or charge pumps-achieving reverse blocking in <1µs with no added BOM cost.
Can LTC4365IDDB-1#TRMPBF be used with 3.3V or 5V input systems?
Yes. The LTC4365IDDB-1#TRMPBF operates down to 2.5V VIN and supports precise UV/OV thresholds as low as 3.3V or 5V using external resistor dividers. Its gate drive enhances up to 9.8V above VOUT, ensuring full turn-on of common 3V-threshold N-MOSFETs even at low input voltages-validated in Analog Devices' Figure 3 and Table 1 for 2.5V–5V supply ranges.
Is LTC4365IDDB-1#TRMPBF pin-compatible with other variants in the LTC4365 family?
Yes. All DFN-packaged LTC4365 variants-including LTC4365CDDB-1#TRMPBF, LTC4365IDDB-1#TRMPBF, and LTC4365HDDB-1#TRMPBF-share identical 8-pin DFN (3mm × 2mm) footprints and pinouts. Only the temperature grade and tape-and-reel marking differ; no PCB layout changes are required when upgrading from commercial (C) to industrial (I) or automotive (H) grades.
LTC4365IDDB-1#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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:
- 8-DFN (3x2)
LTC4365IDDB-1#TRMPBF FAQ
1.How can I place an order for LTC4365IDDB-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4365IDDB-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 LTC4365IDDB-1#TRMPBF reliable?
The price and inventory of LTC4365IDDB-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 LTC4365IDDB-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC4365IDDB-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4365IDDB-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4365IDDB-1#TRMPBF?
LTC4365IDDB-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4365IDDB-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 LTC4365IDDB-1#TRMPBF?
For technical support, including LTC4365IDDB-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4365IDDB-1#TRMPBF requirements.
6.How does Aetrix verify that LTC4365IDDB-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC4365IDDB-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 LTC4365IDDB-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC4365IDDB-1#TRMPBF?
All LTC4365IDDB-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4365IDDB-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 LTC4365IDDB-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC4365IDDB-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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