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Analog Devices Inc. LTC4368HDD-1#TRPBF
- Part No.:
- LTC4368HDD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4368HDD-1#TRPBF.pdf
- Description:
- IC OVERVOLTAGE PROT CONT 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,031
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Product details
Overview
LTC4368HDD-1#TRPBF from Analog Devices is a high-reliability bidirectional electronic circuit breaker and UV/OV/reverse protection controller for automotive and industrial power rails. It operates from 2.5V to 60V input, provides ±100V/–40V fault protection, features +50mV forward and –50mV reverse current sense thresholds (LTC4368-1 variant), and controls back-to-back N-channel MOSFETs in 3mm × 3mm DFN packages rated for –40°C to 125°C ambient.
For engineers reviewing the LTC4368HDD-1#TRPBF datasheet, LTC4368HDD-1#TRPBF pinout, LTC4368HDD-1#TRPBF application, or LTC4368HDD-1#TRPBF equivalent, key selection considerations include its AEC-Q100 qualification, 5µA shutdown current, 32ms turn-on debounce, 100mV reverse re-enable threshold, and compatibility with external N-MOSFETs for low-loss, hot-swappable 24V/48V systems.
Technical Context
The LTC4368HDD-1#TRPBF integrates dual precision comparators (±1.5% UV/OV thresholds with 25mV hysteresis), bidirectional overcurrent detection (±50mV sense), and a charge-pump-based gate driver delivering up to 13.1V enhancement above VOUT. Its internal logic enforces a mandatory 32ms recovery delay after any UV/OV fault before re-enabling the external MOSFETs.
It supports pin-selectable forward overcurrent behavior-latch-off when RETRY is grounded or auto-retry with user-defined cooldown via external capacitor-and implements automatic reverse reconnection only after VOUT falls ≥100mV below VIN, ensuring safe recovery from reverse polarity events without manual intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 2.5V to 60V - defines usable supply range for normal system operation |
| Protection Range | –40V to +100V - withstands reverse battery, load dump, and AC line transients without damage |
| Forward Sense Threshold | +50mV - sets precise forward overcurrent trip point across full temperature range |
| Reverse Sense Threshold | –50mV - enables robust reverse current blocking for LTC4368-1 variant |
| Shutdown Current | 5µA - minimizes quiescent drain in always-on automotive modules |
| Turn-On Delay | 32ms - debounces live insertion and blocks 50/60Hz AC power coupling |
| Temperature Range | –40°C to +125°C - qualified for under-hood and industrial control environments |
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; fast/slow pull-down paths ensure controlled turn-off |
| SENSE | Current sense input | Detects forward (+50mV) and reverse (–50mV) overcurrent faults across external sense resistor; triggers immediate GATE discharge |
| VOUT | Output voltage sense reference | Serves as charge pump return and reverse fault comparator reference; requires ≥1µF local bypass |
| FAULT | Open-drain fault indicator | Pulled low during UV/OV/current faults or SHDN assertion; signals system-level protection event |
| SHDN | Shutdown control input | Active-low enable; toggling clears latched forward overcurrent faults |
| VIN | Main supply input | Accepts –40V to +100V; includes 2.2V UVLO and hot-swap capability |
| UV / OV | Adjustable threshold inputs | Interface to external resistive dividers; 0.5V internal reference with ±1.5% accuracy and 25mV hysteresis |
| RETRY | Forward fault recovery mode select | Ground = latch-off; capacitor = auto-retry with 5.5ms/nF cooldown; unconnected = default latch-off |
| GND | Device ground | Reference for all analog circuitry and fault signaling; exposed pad may be tied to PCB ground |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional circuit breaker | Enables protection against both forward overcurrent (e.g., short-circuit) and reverse current (e.g., battery reversal), critical for dual-power-domain systems |
| AEC-Q100 Grade H qualification | Validated for automotive under-hood applications with guaranteed operation from –40°C to +125°C ambient |
| 32ms turn-on debounce | Eliminates false triggering from supply noise, contact bounce, or AC line interference during hot-plug events |
| Low 5µA shutdown current | Extends battery life in always-connected telematics, ADAS, and ECU modules |
| Back-to-back N-MOSFET control | Supports low RDS(on) discrete FETs for minimal conduction loss and thermal footprint vs. P-MOS solutions |
Applications
| Automotive Power Distribution | Industrial 24V/48V Systems |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS cameras from reverse battery jump-starts and alternator load dump spikes. IC Role / Device Role / Timing Role: Acts as primary front-end protection controller, isolating downstream electronics within microseconds of fault detection. Use Value: Prevents catastrophic failure of sensitive SoCs and sensors by blocking –40V reverse and +100V transients before they reach the load. | Use Scenario: Securing programmable logic controllers (PLCs) and motor drives against field wiring errors and surge events. IC Role / Device Role / Timing Role: Serves as intelligent power switch enabling hot-swap capability and fault-isolation in modular I/O racks. Use Value: Eliminates need for bulky fuses and relays while providing programmable retry/latch behavior and diagnostic FAULT signaling. |
| Energy Storage Systems (ESS) | Portable Test Equipment |
Use Scenario: Safeguarding bidirectional DC-DC converters in battery energy storage systems during charge/discharge transitions. IC Role / Device Role / Timing Role: Monitors both directions of current flow and enforces strict voltage windows to prevent cell overvoltage or deep discharge. Use Value: Enables true bidirectional protection with independent forward/reverse thresholds, supporting regenerative braking and grid-tie inverters. | Use Scenario: Providing robust input protection for handheld oscilloscopes and multimeters connected to unknown or miswired test points. IC Role / Device Role / Timing Role: Functions as self-contained protection module that survives accidental 100V DC or 240V AC misconnections. Use Value: Extends product lifetime and reduces warranty claims by absorbing transient overvoltages and reverse polarity without component degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional overvoltage/overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4368HDD-2#TRPBF | Reverse sense threshold is –3mV instead of –50mV; optimized for ultra-low reverse leakage detection | Better suited for low-power backup supplies where microamp-level reverse current must be blocked | Select LTC4368HDD-2#TRPBF only if sub-10mV reverse trip is required; otherwise LTC4368HDD-1#TRPBF provides stronger reverse fault margin |
| TPS26631RHFR | Single-direction (forward-only) protection IC; no reverse voltage or reverse current capability; integrated FET | Limited to unidirectional 4.5V–60V supplies; lacks reverse battery or bidirectional fault handling | Choose TPS26631RHFR only for cost-sensitive, forward-only applications where reverse protection is handled externally |
Compared with LTC4368HDD-2#TRPBF and TPS26631RHFR, the LTC4368HDD-1#TRPBF uniquely delivers full bidirectional fault coverage (±100V/–40V, ±50mV) with AEC-Q100 H-grade reliability and external MOSFET flexibility-making it the only option for automotive-grade, field-reversible power architectures requiring latch-off or configurable retry behavior.
Availability
LTC4368HDD-1#TRPBF is available at Aetrix Electronics and suitable for automotive power distribution, industrial 24V/48V systems, energy storage systems, and portable test equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC4368HDD-1#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, integrated protection for demanding power rails-designed specifically for automotive and industrial applications where reliability under voltage transients, reverse polarity, and bidirectional overcurrent is non-negotiable.
FAQ
What is the reverse current sense threshold of the LTC4368HDD-1#TRPBF?
The LTC4368HDD-1#TRPBF uses a –50mV reverse current sense threshold (ΔVSENSE,R), meaning it asserts a fault and disconnects the load when the voltage at SENSE falls 50mV below VOUT. This value is fixed for the "-1" variant and applies across the full –40°C to +125°C operating range, enabling reliable reverse battery and regenerative current protection in automotive systems.
Does the LTC4368HDD-1#TRPBF require external MOSFETs?
Yes, the LTC4368HDD-1#TRPBF is a controller IC and requires two external back-to-back N-channel MOSFETs to implement the protection path. It drives their gates via the GATE pin and monitors current through an external sense resistor between SENSE and VOUT. This architecture allows optimization of RDS(on), voltage rating, and thermal performance for each application's specific load requirements.
How does the 32ms turn-on delay function in the LTC4368HDD-1#TRPBF?
The 32ms turn-on delay in the LTC4368HDD-1#TRPBF acts as a power-good debounce timer: after UV/OV faults clear, the device waits 32ms before re-enabling the GATE driver. This prevents chattering during noisy supply conditions and blocks 50Hz/60Hz AC power coupling. The delay is fixed and not adjustable, ensuring consistent behavior across temperature and voltage variations.
Is the LTC4368HDD-1#TRPBF AEC-Q100 qualified?
Yes, the LTC4368HDD-1#TRPBF is AEC-Q100 qualified for Grade H (–40°C to +125°C ambient), with full test documentation per automotive reliability standards. This qualification covers HTOL, TC, UHAST, ESD, and other stress tests, confirming suitability for under-hood and chassis-mounted automotive electronics where long-term reliability under thermal and electrical stress is mandatory.
What is the purpose of the RETRY pin on the LTC4368HDD-1#TRPBF?
The RETRY pin on the LTC4368HDD-1#TRPBF configures forward overcurrent recovery behavior: grounding it enables latch-off mode (requires SHDN toggle to reset), while connecting it to a capacitor sets auto-retry with a cooldown period of 5.5ms per nanofarad. Leaving it unconnected defaults to latch-off. This pin does not affect reverse overcurrent recovery, which is always automatic after VOUT falls ≥100mV below VIN.
LTC4368HDD-1#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-1#TRPBF FAQ
1.How can I place an order for LTC4368HDD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368HDD-1#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-1#TRPBF reliable?
The price and inventory of LTC4368HDD-1#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-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4368HDD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368HDD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368HDD-1#TRPBF?
LTC4368HDD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368HDD-1#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-1#TRPBF?
For technical support, including LTC4368HDD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368HDD-1#TRPBF requirements.
6.How does Aetrix verify that LTC4368HDD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4368HDD-1#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-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4368HDD-1#TRPBF?
All LTC4368HDD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368HDD-1#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-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC4368HDD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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