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Analog Devices Inc. LTC4368HMS-1#WTRPBF
- Part No.:
- LTC4368HMS-1#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4368HMS-1#WTRPBF.pdf
- Description:
- 100V UV/OV & REVERSE PROT CNTR W
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC4368HMS-1#WTRPBF from Analog Devices is a high-voltage bidirectional electronic circuit breaker and UV/OV protection controller for back-to-back N-channel MOSFETs. It provides ±100V/–40V fault protection, +50mV forward / –50mV reverse current sensing, 80µA operating current, and operates from 2.5V to 60V input - deployed in automotive surge protection and energy storage systems.
For engineers reviewing the LTC4368HMS-1#WTRPBF datasheet, LTC4368HMS-1#WTRPBF pinout, LTC4368HMS-1#WTRPBF application, or LTC4368HMS-1#WTRPBF equivalent, key selection criteria include reverse current threshold (–50mV), AEC-Q100 qualification, 10-lead MSOP package with –40°C to 125°C operation, and gate drive capability up to 13.1V enhancement over VOUT.
Technical Context
The LTC4368HMS-1#WTRPBF implements dual fast comparators (1µs propagation) for UV and OV detection with 25mV hysteresis, controlling external N-MOSFETs via a charge-pump-based GATE driver. Its bidirectional overcurrent protection uses separate forward (+50mV) and reverse (–50mV) sense thresholds tied to SENSE–VOUT differential voltage.
It features a 32ms turn-on delay for AC line rejection and noise immunity, auto-retry or latch-off behavior selectable via RETRY pin, and reverse re-enable logic requiring VIN–VOUT ≥ 100mV before reconnecting after reverse faults. The device integrates low-leakage (<10nA) comparator inputs enabling high-value resistor dividers for precise UV/OV thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 60V operating; –40V to 100V fault protection range - supports wide-supply industrial and automotive inputs. |
| Overcurrent Thresholds | +50mV forward / –50mV reverse (LTC4368-1 variant) - sets precise RSENSE-based trip points for bidirectional fault isolation. |
| UV/OV Threshold Accuracy | ±1.5% adjustable via resistive divider; 0.5V internal reference with 25mV hysteresis - enables stable windowed supply monitoring. |
| Quiescent Current | 80µA typical operating current; 5µA shutdown current - minimizes standby power in battery-backed systems. |
| Gate Drive Capability | Up to 13.1V enhancement above VOUT; 90µA fast pull-down sink - ensures robust N-MOSFET turn-on/turn-off across full VIN range. |
| Temperature Range | –40°C to +125°C ambient - qualified for under-hood automotive and harsh industrial environments. |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev H, Grade 1 - meets automotive reliability and stress-test requirements. |
Pinout & Package
Package: 10-Lead Plastic MSOP (LTGTG marking), exposed pad optional for thermal grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply Rail | Primary power input; withstands –40V to 100V transients; includes 2.2V UVLO for hot-swap safety. |
| UV | Undervoltage Comparator Input | Connects to resistive divider; triggers GATE shutdown when VIN falls below user-set threshold (0.5V internal ref). |
| OV | Overvoltage Comparator Input | Connects to resistive divider; triggers immediate GATE discharge if VIN exceeds user-set threshold (0.5V internal ref). |
| RETRY | Forward OC Recovery Mode Select | GND = latch-off; capacitor = auto-retry delay (5.5ms/nF); defines system behavior after forward overcurrent event. |
| GND | Device Ground Reference | Common return for internal circuits and external MOSFET sources; exposed pad may be connected to PCB ground. |
| GATE | N-MOSFET Gate Driver Output | Charge-pump output driving gates of back-to-back N-MOSFETs; tracks VOUT when off; enhances up to 13.1V above VOUT. |
| SENSE | Current Sense Input | Monitors differential voltage across external RSENSE; detects +50mV (forward) or –50mV (reverse) overcurrent conditions. |
| VOUT | Output Voltage Sense | Sense node for load-side voltage; used as charge pump reference when >5V; 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; signals system-level fault condition. |
| SHDN | Shutdown Control Input | Active-low enable; toggling clears latched forward OC faults; pulls GATE low and reduces IVIN to 5µA in shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Overcurrent Protection | Separate +50mV forward and –50mV reverse thresholds enable fail-safe isolation during both supply-to-load and load-to-supply fault currents. |
| AC Line Blocking | 32ms turn-on delay rejects 50Hz/60Hz AC inputs - prevents accidental connection to AC mains or miswired adapters. |
| Reverse Battery Protection | Automatic gate control disconnects load when VIN < 0V down to –40V; no external diode required - reduces power loss and BOM count. |
| Adjustable UV/OV Window | Two independent comparator inputs with ±1.5% accuracy allow custom power-good windows (e.g., 7V–36V) using standard 1% resistors. |
| Hot-Swappable Input | Validated for live insertion at ≤24V; integrated debouncing and fault recovery prevent glitch-induced disconnection during plug-in events. |
Applications
| Automotive Power Distribution | Industrial Energy Storage Systems |
|---|---|
Use Scenario: Protecting ECUs and infotainment modules from reverse battery jump-starts, load dump spikes, and alternator overvoltage events. IC Role / Device Role / Timing Role: UV/OV and bidirectional circuit breaker controller managing gate drive of dual N-MOSFETs in series with battery feed. Use Value: Eliminates need for Schottky diodes or P-MOSFETs; maintains <10mΩ effective RDS(on) path while blocking –40V to 100V faults. | Use Scenario: Safeguarding Li-ion battery packs and DC-DC converters against reverse charging, overvoltage from regenerative braking, and short-circuit faults. IC Role / Device Role / Timing Role: High-accuracy bidirectional current monitor and gate driver enforcing safe charge/discharge boundaries. Use Value: –50mV reverse threshold enables detection of sub-ampere reverse leakage currents before cell damage occurs. |
| Portable Test Equipment | Railway Signaling Interfaces |
Use Scenario: Securing handheld multimeters and oscilloscope front-ends from accidental reverse probe connections or overvoltage transients. IC Role / Device Role / Timing Role: Input protection supervisor ensuring only valid 2.5V–60V supplies power downstream analog signal chains. Use Value: 80µA quiescent current extends battery life; 125°C rating supports compact sealed enclosures without forced cooling. | Use Scenario: Isolating 72V/110V DC signaling rails from EMI-induced surges and polarity reversals in trackside electronics. IC Role / Device Role / Timing Role: Robust front-end protector handling sustained –40V reverse bias and transient 100V spikes per EN 50121-3-2. Use Value: AEC-Q100 qualification ensures compliance with railway EMC and reliability standards without additional derating. |
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 |
|---|---|---|---|
| LTC4368HDD-1#WTRPBF | Same functionality and electrical specs; 3mm × 3mm DFN package instead of MSOP; θJA = 43°C/W vs 160°C/W. | Better thermal performance in high-power layouts; requires different PCB footprint and reflow profile. | Select for higher continuous current designs where thermal dissipation is critical and board space allows DFN placement. |
| TPS26631PWPR | Single-direction (forward-only) protection IC; 60V abs max; no reverse voltage or reverse current protection; no UV detection. | Limited to unidirectional 24V/48V industrial supplies; cannot replace LTC4368HMS-1#WTRPBF in reverse-battery or bidirectional ESS use cases. | Consider only for cost-sensitive forward-only applications where reverse fault conditions are physically impossible. |
Compared with LTC4368HMS-1#WTRPBF, the LTC4368HDD-1#WTRPBF offers superior thermal resistance in DFN form but requires layout revision, while TPS26631PWPR lacks reverse protection entirely - making it unsuitable for automotive or energy storage where bidirectional fault coverage is mandatory.
Availability
LTC4368HMS-1#WTRPBF is available at Aetrix Electronics and suitable for automotive power distribution, industrial energy storage systems, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4368HMS-1#WTRPBF 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.
The LTC4368 product line delivers high-voltage, bidirectional protection controllers for mission-critical power paths - designed specifically for automotive-grade reliability, reverse battery survival, and seamless integration with N-channel MOSFETs in space-constrained systems.
FAQ
What is the reverse current sensing threshold for LTC4368HMS-1#WTRPBF?
The LTC4368HMS-1#WTRPBF uses a fixed –50mV reverse current threshold (ΔVSENSE = SENSE – VOUT), distinguishing it from the –3mV threshold of the LTC4368-2 variant. This value is factory-trimmed and applies across the full –40°C to +125°C temperature range. The threshold directly determines the minimum detectable reverse fault current based on the external sense resistor value (IREV = –50mV / RSENSE). No configuration or calibration is required.
Does LTC4368HMS-1#WTRPBF support hot-swap into a live 24V supply?
Yes, LTC4368HMS-1#WTRPBF supports hot-swap insertion into live supplies up to 24V, as confirmed in the datasheet's "OPERATION" section and validated by its 32ms turn-on delay and input UVLO behavior. The device debounces live connections and blocks 50Hz/60Hz AC - preventing false triggering during plug-in events. For supplies above 24V, pre-charging or soft-start circuitry is recommended to avoid exceeding VOUT slew-rate limits during initial ramp-up.
How does the RETRY pin configure forward overcurrent recovery on LTC4368HMS-1#WTRPBF?
On LTC4368HMS-1#WTRPBF, the RETRY pin selects between latch-off (RETRY grounded) and auto-retry (RETRY tied to capacitor) modes after a forward overcurrent fault. With a capacitor CRETRY, the cool-down delay is tRETRY = 5.5ms/nF × CRETRY; for example, 22nF yields ~120ms. The device asserts FAULT low during cooldown and automatically re-enables GATE after the delay - provided UV/OV conditions remain valid. No SHDN toggle is needed in auto-retry mode.
Can LTC4368HMS-1#WTRPBF protect against 100V transients while operating from a 12V rail?
Yes, LTC4368HMS-1#WTRPBF provides 100V absolute maximum rating on VIN and –40V on reverse inputs, enabling robust protection against ISO 7637-2 Pulse 1/2/5a transients and load-dump events in automotive 12V systems. Its internal charge pump and gate driver remain functional during these faults, maintaining control of external MOSFETs to isolate the load. The 32ms recovery delay ensures the system remains disconnected until the transient fully decays and stable conditions return.
What is the purpose of the exposed pad on the LTC4368HMS-1#WTRPBF MSOP package?
The exposed pad on the LTC4368HMS-1#WTRPBF MSOP package is electrically connected to GND and serves as a thermal and electrical enhancement. While optional per the datasheet, connecting it to a large PCB copper pour significantly improves thermal performance (reducing θJA from 160°C/W) and lowers ground impedance for sensitive analog comparators. It must not be left floating in high-noise environments; either soldered to GND or removed from the footprint per design requirements.
LTC4368HMS-1#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Clamping:
- Adjustable
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC4368HMS-1#WTRPBF FAQ
1.How can I place an order for LTC4368HMS-1#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368HMS-1#WTRPBF 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 LTC4368HMS-1#WTRPBF reliable?
The price and inventory of LTC4368HMS-1#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4368HMS-1#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC4368HMS-1#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368HMS-1#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368HMS-1#WTRPBF?
LTC4368HMS-1#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368HMS-1#WTRPBF 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 LTC4368HMS-1#WTRPBF?
For technical support, including LTC4368HMS-1#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368HMS-1#WTRPBF requirements.
6.How does Aetrix verify that LTC4368HMS-1#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4368HMS-1#WTRPBF 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 LTC4368HMS-1#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC4368HMS-1#WTRPBF?
All LTC4368HMS-1#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368HMS-1#WTRPBF, 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 LTC4368HMS-1#WTRPBF part is unused and in its original packaging.
Return procedure for LTC4368HMS-1#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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