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Analog Devices Inc. LTC4368HDD-2#TRPBF
- Part No.:
- LTC4368HDD-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4368HDD-2#TRPBF.pdf
- Description:
- IC OVERVOLTAGE PROT CONT 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,661
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Product details
Overview
LTC4368HDD-2#TRPBF from Analog Devices is a high-reliability bidirectional electronic circuit breaker and UV/OV protection controller for automotive and industrial power rails. It operates from 2.5V to 60V input, provides ±100V/–40V fault tolerance, features –3mV reverse overcurrent threshold (LTC4368-2 variant), 80µA operating current, and controls back-to-back N-channel MOSFETs in 3mm × 3mm DFN package. It is used in energy storage systems to prevent reverse battery damage and overvoltage transients.
For engineers reviewing the LTC4368HDD-2#TRPBF datasheet, LTC4368HDD-2#TRPBF pinout, LTC4368HDD-2#TRPBF application, or LTC4368HDD-2#TRPBF equivalent, key selection criteria include its –40°C to 125°C AEC-Q100 qualified temperature range, 32ms turn-on delay for AC blocking, adjustable UV/OV thresholds via resistive dividers, and precise ±1.5% voltage window setting capability.
Technical Context
The LTC4368HDD-2#TRPBF integrates dual fast comparators (1µs propagation) with 25mV hysteresis for UV and OV monitoring, and two independent overcurrent comparators: +50mV forward and –3mV reverse sense thresholds. Its gate driver delivers up to 13.1V enhancement above VOUT with 90µA slow pull-down and 90mA fast pull-down capability.
It implements a 32ms recovery delay after UV/OV faults and supports user-configurable forward overcurrent auto-retry via external capacitor on RETRY pin. Reverse overcurrent recovery requires VIN–VOUT ≥ 75mV (typical) before re-enabling, and it blocks 50Hz/60Hz AC by design due to the turn-on debounce timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 60V - defines functional supply window for load-side power delivery |
| Protection Range | –40V to 100V - withstands reverse battery insertion and surge events without latch-up |
| Reverse OC Threshold | –3mV (SENSE–VOUT) - enables ultra-sensitive detection of small reverse leakage currents |
| UV/OV Threshold Accuracy | ±1.5% - ensures precise, stable power-good window setting across temperature |
| Quiescent Current | 80µA - minimizes standby power loss in always-on automotive modules |
| Shutdown Current | 5µA - supports low-power sleep modes in battery-backed systems |
| Temperature Range | –40°C to 125°C - meets AEC-Q100 Grade H requirements for under-hood applications |
Pinout & Package
Package: 10-Lead (3mm × 3mm) Plastic DFN with exposed pad (optional ground connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | Gate drive output | Drives back-to-back N-MOSFET gates with up to 13.1V enhancement above VOUT; includes 90mA fast pull-down for rapid fault isolation |
| SENSE | Current sense input | Detects bidirectional overcurrent: +50mV (forward), –3mV (reverse); referenced to VOUT for accurate RSENSE-based trip setting |
| VOUT | Output voltage sense | Reference node for GATE charge pump and reverse fault comparators; must exceed 2.2V UVLO to enable reverse protection |
| FAULT | Open-drain fault indicator | Pulled low during UV/OV faults, SHDN low, or overcurrent; requires external pull-up for system-level fault signaling |
| SHDN | Shutdown control input | Active-low enable: <0.75V disables GATE driver and reduces current to 5µA; toggling clears latched forward OC faults |
| VIN | Main supply input | Accepts –40V to 100V; hot-swappable with 2.2V UVLO; powers internal LDO and charge pump |
| UV | Undervoltage comparator input | Connects to resistive divider; 0.5V falling threshold with 25mV hysteresis; <1nA leakage enables high-R dividers |
| OV | Overvoltage comparator input | Connects to resistive divider; 0.5V rising threshold with 25mV hysteresis; same low-leakage interface as UV |
| RETRY | Forward OC recovery mode select | Ground = latch-off; capacitor = auto-retry (e.g., 22nF → 120ms cooldown); sets retry timer current sink (2.5–4.5µA) |
| GND | Device ground reference | Return path for all internal circuits; exposed pad may be connected to PCB ground for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional overcurrent protection | +50mV forward / –3mV reverse sensing enables precise current limiting in both supply and backup-battery directions |
| 32ms turn-on delay | Debounces live-insertion events and inherently blocks 50Hz/60Hz AC line interference without external filtering |
| AEC-Q100 Grade H qualification | Validated for –40°C to 125°C operation with full electrical characterization across temperature, supporting automotive under-hood use |
| Low 5µA shutdown current | Enables long-term battery preservation in always-connected telematics and ECU modules |
| Back-to-back N-MOSFET control | Eliminates need for costly P-channel high-side switches while maintaining low RDS(on) conduction losses |
| Adjustable ±1.5% UV/OV window | Allows precise power-good envelope tuning via external resistor dividers, critical for Li-ion and 12V/24V hybrid systems |
Applications
| Automotive Battery Protection | Industrial Power Input Conditioning |
|---|---|
Use Scenario: Preventing damage from reverse battery installation or jump-start polarity errors in vehicle infotainment ECUs. IC Role / Device Role / Timing Role: Bidirectional circuit breaker that disconnects load within 8µs of reverse current detection (–3mV threshold) and blocks negative VIN down to –40V. Use Value: Eliminates need for series diode or P-MOSFET, reducing voltage drop and heat generation while enabling automatic recovery after polarity correction. |
Use Scenario: Securing PLC I/O modules against 100V surges from inductive load switching or lightning-induced transients on 24V DC rails. IC Role / Device Role / Timing Role: UV/OV supervisor with 100V fault tolerance and 32ms debounce; isolates downstream logic upon overvoltage detection. Use Value: Maintains system uptime by rejecting short-duration spikes while ensuring clean power re-application only after stable 32ms recovery window. |
| Energy Storage System (ESS) Interface | Portable Instrumentation Power Path |
Use Scenario: Managing bidirectional power flow between LiFePO₄ battery banks and inverters in off-grid solar systems. IC Role / Device Role / Timing Role: Reverse current limiter (–3mV threshold) and overvoltage protector (up to 100V) for DC bus interconnection. Use Value: Prevents uncontrolled discharge into faulty cells or grid faults while allowing controlled charge/discharge through low-loss N-MOSFETs. |
Use Scenario: Protecting handheld test equipment from accidental reverse adapter connection or overvoltage from lab supplies. IC Role / Device Role / Timing Role: Hot-swap controller with 2.5V–60V operating range and 5µA shutdown current for battery life extension. Use Value: Enables safe field replacement of power adapters without powering down sensitive analog front-ends or memory subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional overvoltage and overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4368IDD-2#TRPBF | Same functionality and pinout; rated for –40°C to 85°C (Grade I) instead of –40°C to 125°C (Grade H) | Suitable for cabin-mounted automotive modules or industrial controllers not exposed to under-hood temperatures | Select when full Grade H temperature range is unnecessary and cost optimization is prioritized |
| TPS26631PWPR | Single-direction (forward-only) protection IC with integrated 80mΩ FET; no reverse current sensing or –40V tolerance | Limited to basic overcurrent/overvoltage protection in non-battery-reverse scenarios | Choose only if reverse polarity risk is eliminated by mechanical design and compact integrated-FET solution is preferred |
Compared with LTC4368HDD-2#TRPBF, LTC4368IDD-2#TRPBF offers identical protection architecture but reduced thermal rating, while TPS26631PWPR sacrifices reverse protection and external FET flexibility for monolithic simplicity-making LTC4368HDD-2#TRPBF uniquely suited for AEC-Q100-compliant, bidirectional, high-voltage robustness-critical designs.
Availability
LTC4368HDD-2#TRPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC power inputs, and energy storage system interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4368HDD-2#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.
The LTC4368 product line delivers robust, precision-controlled power path protection for harsh environments, specifically engineered for automotive-grade reliability, bidirectional fault handling, and seamless integration with discrete N-channel MOSFETs.
FAQ
What is the reverse overcurrent threshold of the LTC4368HDD-2#TRPBF?
The LTC4368HDD-2#TRPBF has a reverse overcurrent threshold of –3mV (SENSE–VOUT), which is fixed for the "-2" variant. This enables highly sensitive detection of small reverse leakage currents, such as those occurring during battery backup switchover or reverse polarity events. The threshold is internally trimmed and specified over the full –40°C to 125°C range.
Does the LTC4368HDD-2#TRPBF support adjustable UV and OV thresholds?
Yes, the LTC4368HDD-2#TRPBF supports fully adjustable undervoltage and overvoltage thresholds using external resistive dividers on the UV and OV pins. Each input has a precise 0.5V internal reference with ±1.5% accuracy and 25mV hysteresis. Typical configurations set windows like 7V–36V, but any range within 2.5V–60V can be implemented with standard 1% resistors.
How does the LTC4368HDD-2#TRPBF handle AC line interference?
The LTC4368HDD-2#TRPBF inherently blocks 50Hz and 60Hz AC power due to its 32ms turn-on delay, which debounces live supply connections and filters out line-frequency noise. This eliminates the need for external AC-blocking capacitors or additional filtering stages in DC-input systems powered from rectified AC sources.
What is the maximum gate drive voltage provided by the LTC4368HDD-2#TRPBF?
The LTC4368HDD-2#TRPBF provides up to 13.1V of gate enhancement above VOUT (ΔVGATE), enabling full enhancement of standard N-channel MOSFETs even at low VIN (e.g., 2.5V). This is achieved via an internal charge pump referenced to VOUT, and the drive strength is maintained across the full –40°C to 125°C operating range.
Is the LTC4368HDD-2#TRPBF qualified for automotive applications?
Yes, the LTC4368HDD-2#TRPBF is AEC-Q100 qualified for automotive applications (Grade H, –40°C to 125°C) and manufactured under controlled automotive processes. It includes full temperature-range characterization, enhanced ESD robustness, and reliability testing per AEC-Q100 standards-making it suitable for under-hood and safety-critical power rail protection.
LTC4368HDD-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Clamping:
- Adjustable
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- -
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC4368HDD-2#TRPBF FAQ
1.How can I place an order for LTC4368HDD-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368HDD-2#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 LTC4368HDD-2#TRPBF reliable?
The price and inventory of LTC4368HDD-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4368HDD-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4368HDD-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368HDD-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368HDD-2#TRPBF?
LTC4368HDD-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368HDD-2#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 LTC4368HDD-2#TRPBF?
For technical support, including LTC4368HDD-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368HDD-2#TRPBF requirements.
6.How does Aetrix verify that LTC4368HDD-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4368HDD-2#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 LTC4368HDD-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4368HDD-2#TRPBF?
All LTC4368HDD-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368HDD-2#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 LTC4368HDD-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4368HDD-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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