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Analog Devices Inc. LTC4368IDD-1#PBF
- Part No.:
- LTC4368IDD-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4368IDD-1#PBF.pdf
- Description:
- IC SURGE SUPPRESSION ADJ 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:147
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Product details
Overview
LTC4368IDD-1#PBF from Analog Devices is a bidirectional electronic circuit breaker and UV/OV protection controller for 2.5V–60V input systems, featuring ±50mV forward/reverse current sense thresholds, –40V to 100V fault tolerance, and AEC-Q100 qualification for automotive surge protection in battery-powered industrial equipment.
For engineers reviewing the LTC4368IDD-1#PBF datasheet, LTC4368IDD-1#PBF pinout, LTC4368IDD-1#PBF application, or LTC4368IDD-1#PBF equivalent, key selection criteria include reverse current threshold (–50mV), operating temperature range (–40°C to 85°C), DFN-10 package compatibility, and latch-off vs auto-retry configuration via RETRY pin.
Technical Context
The LTC4368IDD-1#PBF implements dual high-speed comparators (1µs propagation) with 25mV hysteresis for UV/OV monitoring, and two independent overcurrent comparators: +50mV for forward faults and –50mV for reverse faults (LTC4368-1 variant). It drives back-to-back N-channel MOSFETs using an internal charge pump delivering up to 13.1V gate enhancement referenced to VOUT.
It integrates 32ms turn-on delay for AC line rejection (50/60Hz blocking), 80µA operating current, and 5µA shutdown current. Fault recovery requires sustained valid input voltage for 32ms before re-enabling GATE; reverse fault reconnection occurs only after VOUT falls ≥100mV below VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 60V operating; –40V to 100V fault protection - enables robust operation across automotive battery transients and industrial power rails. |
| Forward/Reverse OC Threshold | +50mV / –50mV (LTC4368-1) - sets precise bidirectional current limiting without external amplification. |
| UV/OV Threshold Accuracy | ±1.5% adjustable via resistive divider - supports stable power-good window definition (e.g., 7V–36V) with minimal drift over temperature. |
| Operating Current | 80µA typical - minimizes quiescent load on primary supply in always-on systems like telematics or ECU keep-alive circuits. |
| Package & Temp Grade | 10-lead 3mm × 3mm DFN, –40°C to 85°C - meets extended temperature requirements for under-hood automotive and industrial control applications. |
| GATE Drive Capability | Up to 13.1V enhancement above VOUT - ensures full enhancement of standard logic-level N-MOSFETs even at low VIN (e.g., 2.5V). |
| Shutdown Current | 5µA maximum - enables ultra-low-power state during system sleep or battery disconnect scenarios. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (optional ground connection). Pin count and layout match MSOP-10 but with smaller footprint and improved thermal performance (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | Gate drive output | Drives back-to-back N-MOSFET gates with internal charge pump; pulls down fast (90mA sink) during faults; tracks VOUT when off. |
| SENSE | Current sense input | Detects forward (+50mV) and reverse (–50mV) overcurrent by measuring voltage across external RSENSE between SENSE and VOUT. |
| VOUT | Output voltage sense reference | Serves as charge pump reference and reverse fault comparator input; must rise >2.2V UVLO before reverse protection activates. |
| FAULT | Open-drain fault indicator | Pulled low on UV/OV/OC faults or SHDN assertion; requires external pull-up; signals system controller to initiate safe shutdown. |
| SHDN | Shutdown control input | Active-low enable; toggling low→high resets latched forward OC faults; must stay ≤80V when VIN >80V. |
| VIN | Main supply input | Accepts –40V to 100V; includes 2.2V UVLO; hot-swap capable below 24V; powers internal LDO and charge pump. |
| UV / OV | Adjustable comparator inputs | Connect to resistive dividers to set user-defined undervoltage/overvoltage trip points with ±1.5% accuracy and <1nA leakage. |
| RETRY | Forward OC response mode select | Grounded = latch-off; capacitor-connected = auto-retry with 5.5ms/nF cooldown delay; unconnected = default latch-off. |
| GND | Device ground | Reference for all internal circuits; exposed pad may be connected to PCB ground for improved thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional overcurrent protection | +50mV forward / –50mV reverse sensing enables single RSENSE placement for both charging and discharging paths in energy storage systems. |
| 32ms turn-on delay | Rejects 50Hz/60Hz AC ripple and debounces live-insertion events - prevents false triggering during hot-swap or unstable supply ramp-up. |
| AEC-Q100 qualified | Rated for –40°C to 85°C operation with automotive-grade reliability testing - suitable for engine control, ADAS, and infotainment power management. |
| Low-quiescent-current operation | 80µA operating / 5µA shutdown current extends battery life in portable instrumentation and remote sensors. |
| Back-to-back N-MOSFET control | Eliminates need for P-channel high-side switches - reduces conduction loss and cost while enabling scalable current handling via MOSFET selection. |
Applications
| Automotive Battery Protection | Industrial Power Input Conditioning |
|---|---|
Use Scenario: Preventing damage from reverse battery installation, jump-start surges, or alternator load dump in vehicle ECUs. IC Role / Device Role / Timing Role: UV/OV/OC supervisor controlling back-to-back N-MOSFETs; enforces 32ms power-good delay before enabling load. Use Value: Blocks –40V reverse polarity and 100V transients while maintaining <80µA standby draw - critical for ISO 16750-2 compliance. |
Use Scenario: Securing PLC I/O modules against field-wiring errors, induced surges, and accidental AC mains contact. IC Role / Device Role / Timing Role: Bidirectional circuit breaker with configurable UV/OV windows; isolates load within 8µs of overcurrent detection. Use Value: Enables use of low-RDS(on) N-MOSFETs instead of costly P-ch devices - reducing conduction loss by >50% at 10A. |
| Energy Storage System (ESS) Interface | Portable Test Equipment Power Path |
Use Scenario: Managing bidirectional current flow between Li-ion battery packs and DC bus in UPS or solar inverters. IC Role / Device Role / Timing Role: Reverse current limiter with –50mV threshold; automatically reconnects after VOUT drops 100mV below VIN post-fault. Use Value: Eliminates need for separate reverse-blocking diodes or active OR-ing controllers - simplifies BOM and improves efficiency. |
Use Scenario: Protecting handheld multimeters and oscilloscope probes from misapplied voltages during field measurements. IC Role / Device Role / Timing Role: Wide-input UVLO supervisor (2.5V–60V) with latch-off OC response; disables output until SHDN toggle confirms safe reset. Use Value: Survives –40V reverse connections and 100V spikes while drawing <5µA in shutdown - extends alkaline battery life beyond 1 year. |
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 |
|---|---|---|---|
| LTC4368IDD-2#PBF | Reverse OC threshold = –3mV (vs –50mV); optimized for low-voltage reverse leakage detection in USB PD or battery charging paths. | Enables tighter reverse current control in sub-5V systems; unsuitable where –50mV threshold is required for fault margin. | Select LTC4368IDD-2#PBF only if application demands microamp-level reverse current limiting; otherwise LTC4368IDD-1#PBF provides superior noise immunity. |
| TPS26631PWPR | Single-direction (forward-only) protection IC; 4.5V–60V input; integrated 100mΩ FET; no reverse voltage or reverse current protection. | Limited to unidirectional 10A loads; lacks –40V reverse input rating and bidirectional OC sensing. | Choose TPS26631PWPR only for cost-sensitive, forward-only applications where reverse fault conditions are physically impossible. |
Compared with LTC4368IDD-2#PBF, the LTC4368IDD-1#PBF offers higher reverse fault immunity for automotive and industrial environments; compared with TPS26631PWPR, it delivers full bidirectional protection and external MOSFET scalability at the cost of added design complexity.
Availability
LTC4368IDD-1#PBF 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 LTC4368IDD-1#PBF 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 precision instrumentation, industrial automation, communications, and automotive markets.
The LTC4368 product line delivers robust front-end protection for sensitive downstream electronics, specifically engineered for automotive-grade reliability, wide-input transient tolerance, and bidirectional current control in harsh electrical environments.
FAQ
What is the reverse overcurrent threshold for LTC4368IDD-1#PBF?
The LTC4368IDD-1#PBF has a fixed reverse overcurrent threshold of –50mV (SENSE – VOUT), as specified in the datasheet Rev. C, page 3, ΔVSENSE,R parameter. This value is inherent to the -1 variant and enables reliable detection of reverse current faults in automotive and industrial applications where high reverse fault margin is required.
Does LTC4368IDD-1#PBF support hot-swap capability?
Yes, LTC4368IDD-1#PBF supports hot-swap for supplies up to 24V on the VOUT pin, as stated in the PIN FUNCTIONS section (page 7). For higher voltages, inrush control via GATE capacitance and proper sequencing is required. The 32ms turn-on delay also provides inherent debounce for live insertion events.
How does the RETRY pin configure fault recovery behavior in LTC4368IDD-1#PBF?
In LTC4368IDD-1#PBF, grounding the RETRY pin configures latch-off behavior after a forward overcurrent fault - power remains disabled until SHDN is toggled low then high. Connecting a capacitor to RETRY sets auto-retry with a cooldown delay of 5.5ms per nanofarad, as confirmed in the ELECTRICAL CHARACTERISTICS table (page 4, tRETRY).
What is the maximum gate drive voltage provided by LTC4368IDD-1#PBF?
The LTC4368IDD-1#PBF provides up to 13.1V of gate enhancement (GATE – VOUT) when VIN ≥12V, per the Electrical Characteristics table (page 4, ΔVGATE MAX). This ensures full enhancement of standard logic-level N-channel MOSFETs even at minimum operating input voltage (2.5V), where gate drive drops to 3V.
Is LTC4368IDD-1#PBF qualified for automotive applications?
Yes, LTC4368IDD-1#PBF is AEC-Q100 qualified for automotive applications, with guaranteed operation from –40°C to 85°C and automotive reliability testing, as explicitly stated in the FEATURES section (page 1) and ORDER INFORMATION table (page 2) under "AUTOMOTIVE PRODUCTS**".
LTC4368IDD-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tube
- 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)
LTC4368IDD-1#PBF FAQ
1.How can I place an order for LTC4368IDD-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368IDD-1#PBF 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 LTC4368IDD-1#PBF reliable?
The price and inventory of LTC4368IDD-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4368IDD-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4368IDD-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368IDD-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368IDD-1#PBF?
LTC4368IDD-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368IDD-1#PBF 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 LTC4368IDD-1#PBF?
For technical support, including LTC4368IDD-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368IDD-1#PBF requirements.
6.How does Aetrix verify that LTC4368IDD-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4368IDD-1#PBF 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 LTC4368IDD-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4368IDD-1#PBF?
All LTC4368IDD-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368IDD-1#PBF, 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 LTC4368IDD-1#PBF part is unused and in its original packaging.
Return procedure for LTC4368IDD-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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