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Analog Devices Inc. LTC4368CDD-1#PBF
- Part No.:
- LTC4368CDD-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4368CDD-1#PBF.pdf
- Description:
- IC SURGE SUPPRESSION ADJ 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:139
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Product details
Overview
LTC4368CDD-1#PBF from Analog Devices is a bidirectional electronic circuit breaker and UV/OV protection controller for 2.5V–60V input supplies, featuring ±50mV forward/reverse current sense thresholds, 100V overvoltage and –40V reverse voltage protection, and gate drive control for back-to-back N-channel MOSFETs in automotive surge protection and energy storage systems.
For engineers reviewing the LTC4368CDD-1#PBF datasheet, LTC4368CDD-1#PBF pinout, LTC4368CDD-1#PBF application, or LTC4368CDD-1#PBF equivalent, this device delivers precise undervoltage/overvoltage windowing (±1.5% threshold accuracy), low 80µA operating current, 32ms turn-on debounce, and AEC-Q100-compliant operation in a 3mm × 3mm DFN package - critical for robust hot-swap and reverse-battery protection designs.
Technical Context
The LTC4368CDD-1#PBF implements dual high-speed comparators (1µs propagation) with 25mV hysteresis on UV/OV inputs to enforce a user-defined valid input voltage window; it drives external N-MOSFETs via a charge pump delivering up to 13.1V gate enhancement referenced to VOUT, with fast (6µs) and slow (575µs) GATE pull-down paths for fault response differentiation.
Its bidirectional current sensing uses a single SENSE–VOUT differential input with fixed +50mV forward and –50mV reverse thresholds (LTC4368-1 variant), triggering 60mA GATE sink activation within 18µs of overcurrent detection; after reverse faults, automatic reconnection occurs only when VIN exceeds VOUT by ≥100mV, ensuring safe recovery from negative supply events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 60V operating; –40V to 100V fault protection - enables use across 12V/24V/48V automotive and industrial rails with transient survivability. |
| UV/OV Threshold Accuracy | ±1.5% adjustable window via external resistive divider - supports precise power-good validation without calibration. |
| Current Sense Thresholds | +50mV forward / –50mV reverse (LTC4368-1) - sets exact trip points for bidirectional overcurrent protection using single sense resistor. |
| Quiescent Current | 80µA typical operating / 5µA shutdown - minimizes standby loss in battery-powered instrumentation and portable systems. |
| Gate Drive Capability | Up to 13.1V enhancement above VOUT - ensures full enhancement of standard logic-level N-MOSFETs even at low VIN (2.5V). |
| Turn-On Delay | 32ms debounced recovery - blocks 50Hz/60Hz AC line noise and prevents chattering during marginal supply conditions. |
| Temperature Range | 0°C to 70°C (Commercial grade C) - validated for non-automotive industrial and consumer embedded applications. |
Pinout & Package
Package: 10-Lead (3mm × 3mm) Plastic DFN (DD package), exposed pad optional for thermal grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | Gate drive output | Drives gates of back-to-back N-MOSFETs; provides charge-pump-enhanced voltage up to VIN+14V referenced to VOUT. |
| SENSE | Differential current sense input | Monitors SENSE–VOUT voltage; triggers fault at +50mV (forward) or –50mV (reverse) for bidirectional OC protection. |
| VOUT | Output voltage sense reference | Serves as gate drive reference and reverse fault comparator input; requires ≥1µF local bypass to GND. |
| FAULT | Open-drain fault indicator | Pulled low on UV/OV/OC faults or SHDN assertion; requires external pull-up for system-level fault signaling. |
| SHDN | Shutdown control input | Active-low enable; toggling clears latched forward OC faults and initiates 800µs startup sequence. |
| VIN | Main supply input | Accepts –40V to 100V; includes 2.2V UVLO and hot-swap capability; maximum 60V continuous operation. |
| UV | Undervoltage comparator input | Connects to resistive divider; 0.5V falling threshold with 25mV hysteresis for accurate low-voltage detection. |
| OV | Overvoltage comparator input | Connects to resistive divider; 0.5V rising threshold with 25mV hysteresis for precise high-voltage cutoff. |
| RETRY | Forward OC recovery mode select | Grounded = latch-off; capacitor-connected = auto-retry with 120ms cooldown (CRETRY = 22nF); defines fault recovery behavior. |
| GND | Device ground reference | Primary return path for internal circuitry and gate drive current; exposed pad may be tied to PCB ground. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional circuit breaker | +50mV forward / –50mV reverse current sense thresholds enable symmetric protection against load-to-source and source-to-load faults. |
| AC line blocking | 32ms turn-on delay inherently rejects 50Hz/60Hz AC input - eliminates need for external rectification or filtering in dual-polarity adapter interfaces. |
| Reverse battery protection | Automatic isolation at –40V input with fast GATE pull-down ensures zero reverse current flow into protected load circuits. |
| Hot-swappable input | Validated for live insertion at ≤24V; UVLO and debounce prevent false triggering during plug-in transients. |
| AEC-Q100 qualification | Commercial-grade LTC4368CDD-1#PBF shares same silicon and test flow as automotive variants - supports early-stage design reuse. |
Applications
| Automotive Battery Protection | Industrial Power Input Conditioning |
|---|---|
Use Scenario: 12V/24V vehicle electrical system with risk of reverse battery connection or jump-start polarity reversal. IC Role / Device Role / Timing Role: Controller for back-to-back N-MOSFETs that isolates load from VIN during –40V reverse events and enforces 7V–36V valid window. Use Value: Prevents catastrophic damage to ECUs and infotainment modules; eliminates need for bulky diode-based reverse protection. |
Use Scenario: Programmable logic controller (PLC) power input exposed to field wiring errors and lightning-induced surges. IC Role / Device Role / Timing Role: UV/OV supervisor and bidirectional current limiter that disconnects downstream circuitry within 8µs of overcurrent detection. Use Value: Maintains system uptime by surviving ±100V transients while enabling fast fault recovery via RETRY-timed auto-reconnect. |
| Energy Storage System (ESS) DC Coupling | Portable Test Instrumentation |
Use Scenario: Bidirectional DC link between lithium-ion battery pack and grid-tie inverter, subject to regenerative braking currents. IC Role / Device Role / Timing Role: Reverse-current protector that blocks –0.6A to –10A fault currents while allowing controlled discharge through external MOSFETs. Use Value: Enables true bidirectional power flow safety without separate reverse-blocking diodes or complex gate-drive sequencing. |
Use Scenario: Handheld multimeter or oscilloscope with interchangeable power sources (battery, USB, external adapter). IC Role / Device Role / Timing Role: Input supervisor enforcing 2.5V–60V compatibility and preventing damage from misconnected adapters or depleted batteries. Use Value: Extends product lifecycle by eliminating field returns due to user-induced overvoltage or reverse-polarity incidents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UV/OV and bidirectional overcurrent protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4368CDD-2#PBF | –3mV reverse current threshold vs –50mV; identical UV/OV accuracy, package, and temperature range. | Better suited for low-voltage reverse leakage detection (e.g., supercapacitor balancing), less tolerant of sensor offset drift. | Select LTC4368CDD-2#PBF only if sub-10mV reverse trip is required; otherwise LTC4368CDD-1#PBF offers higher noise immunity. |
| TPS26631RGER | Fixed 3.3V–60V operating range; no adjustable UV/OV; 1.2A max continuous current; integrated MOSFETs. | Single-chip solution for lower-power applications; lacks bidirectional OC, reverse voltage rating (–0.3V only), and external MOSFET flexibility. | Choose TPS26631RGER for space-constrained 1A designs where adjustable protection windows are unnecessary. |
Compared with LTC4368CDD-2#PBF, the LTC4368CDD-1#PBF provides superior reverse fault noise margin; compared with TPS26631RGER, it enables scalable high-current (>10A) protection with discrete MOSFET selection and full bidirectional fault coverage - essential for automotive and ESS applications.
Availability
LTC4368CDD-1#PBF is available at Aetrix Electronics and suitable for automotive battery protection, industrial power input conditioning, and energy storage system DC coupling requiring stable component supply, long-term manufacturability, and AEC-Q100-aligned reliability.
Supply support for LTC4368CDD-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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and power integrity applications.
The LTC4368 product line delivers robust front-end protection for sensitive electronics, designed specifically for automotive, industrial, and energy infrastructure systems requiring fail-safe response to voltage transients, reverse polarity, and bidirectional overcurrent events.
FAQ
What is the reverse voltage protection limit of the LTC4368CDD-1#PBF?
The LTC4368CDD-1#PBF provides reverse supply protection down to –40V, verified per Absolute Maximum Ratings. It actively disconnects the load by pulling GATE low when VIN falls below –40V or when reverse current exceeds –50mV across the sense resistor. This protects downstream circuitry from battery reversal or negative transients without requiring external diodes.
How does the LTC4368CDD-1#PBF differ from the LTC4368CDD-2#PBF?
The LTC4368CDD-1#PBF uses a –50mV reverse current sense threshold, while the LTC4368CDD-2#PBF uses –3mV. Both share identical UV/OV accuracy, package, temperature range, and pinout. The –50mV threshold in LTC4368CDD-1#PBF improves noise immunity in high-noise environments like automotive chassis grounds, whereas –3mV suits ultra-low-voltage reverse leakage detection.
Can the LTC4368CDD-1#PBF be used with 48V industrial systems?
Yes - the LTC4368CDD-1#PBF operates continuously from 2.5V to 60V and withstands transients up to 100V. Its 32ms turn-on delay blocks 50Hz/60Hz AC components often present on poorly filtered 48V rails, and its ±50mV current sense enables precise overcurrent protection for high-power motor drives or PoE++ injectors using appropriately rated external MOSFETs.
What is the purpose of the RETRY pin on the LTC4368CDD-1#PBF?
The RETRY pin on the LTC4368CDD-1#PBF configures forward overcurrent fault recovery: grounded = latch-off (requires SHDN toggle to reset); capacitor-connected = auto-retry with programmable cooldown (e.g., 120ms with 22nF). This allows designers to choose between fail-safe lockout or self-healing behavior based on system safety requirements.
Does the LTC4368CDD-1#PBF require external MOSFETs?
Yes - the LTC4368CDD-1#PBF is a controller IC and requires two external N-channel MOSFETs connected back-to-back between VIN and VOUT. It drives their gates via the GATE pin and monitors current via an external sense resistor between SENSE and VOUT. This architecture enables scalable current handling (up to 10A+), thermal optimization, and voltage rating flexibility beyond integrated solutions.
LTC4368CDD-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)
LTC4368CDD-1#PBF FAQ
1.How can I place an order for LTC4368CDD-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368CDD-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 LTC4368CDD-1#PBF reliable?
The price and inventory of LTC4368CDD-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 LTC4368CDD-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4368CDD-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368CDD-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368CDD-1#PBF?
LTC4368CDD-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368CDD-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 LTC4368CDD-1#PBF?
For technical support, including LTC4368CDD-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368CDD-1#PBF requirements.
6.How does Aetrix verify that LTC4368CDD-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4368CDD-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 LTC4368CDD-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4368CDD-1#PBF?
All LTC4368CDD-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368CDD-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 LTC4368CDD-1#PBF part is unused and in its original packaging.
Return procedure for LTC4368CDD-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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