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Analog Devices Inc. LTC4368HMS-2#WPBF
- Part No.:
- LTC4368HMS-2#WPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4368HMS-2#WPBF.pdf
- Description:
- 100V UV/OV & REVERSE PROT CNTR W
- Quantity:
- Payment:
- Shipping:
Inventory:562
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Product details
Overview
LTC4368HMS-2#WPBF from Analog Devices is a high-voltage bidirectional electronic circuit breaker and UV/OV protection controller for back-to-back N-channel MOSFETs. It operates from 2.5V to 60V input, provides ±100V/–40V fault tolerance, features –3mV reverse current sense threshold (LTC4368-2 variant), 80µA operating current, and 32ms turn-on delay for AC blocking - used in automotive surge protection and energy storage systems.
For engineers reviewing the LTC4368HMS-2#WPBF datasheet, LTC4368HMS-2#WPBF pinout, LTC4368HMS-2#WPBF application, or LTC4368HMS-2#WPBF equivalent, key selection criteria include reverse current trip accuracy (–3mV), AEC-Q100 qualification (–40°C to 125°C), MSOP-10 package thermal performance (θJA = 160°C/W), and RETRY-configurable forward overcurrent recovery.
Technical Context
The LTC4368HMS-2#WPBF implements dual-directional overcurrent protection using separate forward (+50mV) and reverse (–3mV) sense thresholds referenced to SENSE–VOUT, with automatic re-enable after reverse faults when VIN–VOUT exceeds 75mV. Its UV/OV comparators use 0.5V internal references with 25mV hysteresis and <1nA leakage, enabling high-impedance resistive dividers for precise 7V–36V window setting in automotive applications.
Gate drive employs an internal charge pump delivering up to 13.1V enhancement (GATE–VOUT) with 35µA pull-up and 90mA fast pull-down capability. Fault response includes 2µs UV/OV propagation delay, 8µs overcurrent fault propagation, and 32ms GATE turn-on delay to suppress 50/60Hz AC and supply transients before enabling power delivery.
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 surges. |
| Reverse Current Threshold | –3mV (SENSE–VOUT) - specific to LTC4368-2 variant; allows ultra-low-threshold reverse polarity detection without external amplification. |
| Forward Current Threshold | +50mV (SENSE–VOUT) - sets precise forward overcurrent trip point independent of temperature or supply voltage. |
| Operating Current | 80µA typical - minimizes quiescent power draw in always-on automotive modules and battery-backed systems. |
| Temperature Range | –40°C to +125°C - qualified per AEC-Q100 Grade H; supports under-hood and industrial control environments. |
| Package | 10-Lead Plastic MSOP - surface-mount footprint with exposed pad option; θJA = 160°C/W enables thermal management in compact layouts. |
| UV/OV Threshold Accuracy | ±1.5% adjustable via external resistor divider - ensures reliable power-good window enforcement across voltage rails. |
Pinout & Package
Package: 10-Lead Plastic MSOP (LTGTJ marking), –40°C to +125°C ambient rating, exposed pad optional for thermal relief or grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Power supply input | Accepts –40V to 100V; includes 2.2V UVLO and hot-swap capability; primary fault sensing node. |
| 2 UV | Undervoltage comparator input | Connects to resistive divider; 0.5V falling threshold with 25mV hysteresis; <1nA leakage enables high-R dividers. |
| 3 OV | Overvoltage comparator input | Connects to resistive divider; 0.5V rising threshold with 25mV hysteresis; same low-leakage interface as UV. |
| 4 RETRY | Forward overcurrent recovery mode select | Ground for latch-off; capacitor for auto-retry (5.5ms/nF); defines cooldown timing after forward OC fault. |
| 5 GND | Device ground reference | Common return for all analog and digital functions; exposed pad may be connected here for thermal/EMI benefit. |
| 6 GATE | External MOSFET gate driver output | Charge-pump-driven; delivers up to 13.1V above VOUT; 90mA fast pull-down for rapid MOSFET turn-off. |
| 7 SENSE | Current sense input | Differential input referenced to VOUT; detects +50mV (forward) or –3mV (reverse) across external RSENSE. |
| 8 VOUT | Output voltage sense/reference | Sense node for reverse current comparator; charge pump reference above ~5V; requires ≥1µF local bypass. |
| 9 FAULT | Open-drain fault indicator | Pulled low on UV/OV/OC/SHDN assertion; requires external pull-up; signals system controller of protection event. |
| 10 SHDN | Shutdown control input | Active-low enable; 0.75V threshold; places device in 5µA shutdown state while preserving fault status. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional circuit breaker | Separate +50mV forward and –3mV reverse current thresholds enable precise, direction-aware load disconnection without external op-amps. |
| 32ms turn-on delay | Debounces live connections and blocks 50Hz/60Hz AC input - eliminates false triggering during hot-plug events or noisy mains-derived supplies. |
| AEC-Q100 Grade H qualification | Validated for –40°C to +125°C operation with full electrical characterization - meets automotive under-hood reliability requirements. |
| Back-to-back N-MOSFET control | Eliminates body diode conduction path in reverse polarity; enables true bidirectional blocking with low RDS(on) efficiency. |
| Adjustable UV/OV window | ±1.5% threshold accuracy via external resistor divider - supports custom power-good windows (e.g., 7V–36V) for diverse load requirements. |
| Low shutdown current | 5µA max shutdown current - extends battery life in portable instrumentation and always-on telematics modules. |
Applications
| Automotive Battery Protection | Industrial Energy Storage Systems |
|---|---|
Use Scenario: Reverse battery connection or jump-start with incorrect polarity in 12V/24V vehicle electronics. IC Role / Device Role / Timing Role: Bidirectional circuit breaker enforcing –40V reverse blocking and –3mV reverse current detection; 32ms AC-blocking delay prevents mis-triggering on alternator ripple. Use Value: Prevents catastrophic MOSFET failure and PCB damage during field service errors without requiring costly fuse replacement or manual reset. |
Use Scenario: DC-link protection between lithium-ion battery packs and inverters in UPS or grid-tied storage. IC Role / Device Role / Timing Role: UV/OV supervisor with 7V–36V window enforcement and bidirectional overcurrent cutoff; handles regenerative braking currents up to 12.5A forward / –0.75A reverse. Use Value: Enables safe bidirectional power flow while protecting against cell imbalance-induced overvoltage and short-circuit faults during charge/discharge cycles. |
| Portable Test Equipment | Hot-Swappable Power Modules |
Use Scenario: Field-deployed multimeters or oscilloscope accessories powered from variable lab supplies or batteries. IC Role / Device Role / Timing Role: Input protector with 2.5V–60V operating range and 80µA quiescent current; RETRY pin configures latched-off behavior for safety-critical disconnect. Use Value: Guarantees instrument integrity during accidental overvoltage exposure or reverse connection, reducing calibration drift and field returns. |
Use Scenario: Modular server PSUs or telecom rectifiers requiring live insertion/removal without system downtime. IC Role / Device Role / Timing Role: Hot-swap controller with 32ms debounce and fault-latched GATE drive; FAULT pin signals host controller prior to power removal. Use Value: Enables zero-downtime maintenance by isolating faulty modules while maintaining system-level power continuity and fault logging. |
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#WPBF | Same functionality and specs, but in 3mm × 3mm DFN package (θJA = 43°C/W vs MSOP's 160°C/W); no exposed pad requirement. | Better thermal performance in high-power density layouts; less board area but requires careful DFN reflow profile control. | Select when thermal dissipation >150mW is expected or when PCB real estate is constrained and DFN assembly is established. |
| TPS26631RHFR | Single-direction (forward-only) protection IC; 4.5V–60V range; fixed 3.3V UVLO; no reverse current sensing or –40V tolerance. | Lacks reverse polarity and bidirectional current protection; not suitable for automotive battery or regenerative energy applications. | Consider only for cost-sensitive, forward-only industrial supplies where reverse fault risk is eliminated by mechanical design. |
Compared with LTC4368HMS-2#WPBF, the LTC4368HDD-2#WPBF offers superior thermal handling in space-constrained designs, while the TPS26631RHFR sacrifices reverse protection and precision adjustability for lower BOM cost in unidirectional use cases.
Availability
LTC4368HMS-2#WPBF is available at Aetrix Electronics and suitable for automotive surge protection, energy storage systems, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4368HMS-2#WPBF 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 (now part of Analog Devices, Inc., a subsidiary of Analog Devices, Inc.) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC4368 product line delivers integrated high-voltage protection controllers for automotive, industrial, and test equipment - designed to replace discrete protection circuits with single-chip solutions offering precision, reliability, and AEC-Q100 compliance.
FAQ
What is the reverse current sense threshold for LTC4368HMS-2#WPBF?
The LTC4368HMS-2#WPBF uses a –3mV (SENSE–VOUT) reverse current threshold, distinguishing it from the –50mV threshold of the LTC4368-1 variant. This ultra-low threshold enables detection of small reverse leakage currents without external amplification, critical for battery backup and energy harvesting applications where even microampere-level reverse flow must be blocked. The value is specified over the full –40°C to +125°C range.
Does LTC4368HMS-2#WPBF support AEC-Q100 qualification?
Yes, LTC4368HMS-2#WPBF is AEC-Q100 qualified for Grade H (–40°C to +125°C ambient), with full electrical characterization and reliability testing performed per automotive standards. The "H" suffix in the part number explicitly denotes this qualification level, and the #WPBF suffix confirms automotive-grade packaging and traceability. This makes LTC4368HMS-2#WPBF suitable for under-hood and transmission-control applications.
How does the RETRY pin configure forward overcurrent recovery on LTC4368HMS-2#WPBF?
On LTC4368HMS-2#WPBF, the RETRY pin determines forward overcurrent behavior: grounding RETRY forces latch-off (MOSFETs remain off until SHDN is toggled), while connecting a capacitor (e.g., 22nF) sets a 120ms cooldown delay before automatic retry. The timing is 5.5ms per nanofarad, allowing precise adjustment from ~10ms to several seconds. This configuration is independent of reverse fault recovery, which automatically reconnects when VIN–VOUT exceeds 75mV.
What is the maximum gate drive voltage provided by LTC4368HMS-2#WPBF?
LTC4368HMS-2#WPBF delivers up to 13.1V of gate enhancement (GATE–VOUT) when VIN ≥12V, sufficient to fully enhance standard logic-level N-channel MOSFETs. The drive voltage scales with VIN: 4V at VIN=2.5V, 8.7V at VIN=5V, and 13.1V at VIN≥12V. This adaptive drive ensures reliable MOSFET turn-on across the full 2.5V–60V input range while minimizing gate drive losses in low-voltage systems.
Can LTC4368HMS-2#WPBF block 50Hz/60Hz AC input?
Yes, LTC4368HMS-2#WPBF incorporates a fixed 32ms turn-on delay that inherently blocks 50Hz (20ms period) and 60Hz (16.7ms period) AC waveforms. This delay is applied after UV/OV faults clear and before GATE drive resumes, ensuring the external MOSFETs remain off for at least one full AC cycle - preventing partial conduction, heating, and false triggering during AC line transients or accidental AC adapter connection.
LTC4368HMS-2#WPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- 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-2#WPBF FAQ
1.How can I place an order for LTC4368HMS-2#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368HMS-2#WPBF 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-2#WPBF reliable?
The price and inventory of LTC4368HMS-2#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4368HMS-2#WPBF is usually 5 days.
3.What payment methods are accepted for LTC4368HMS-2#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368HMS-2#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368HMS-2#WPBF?
LTC4368HMS-2#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368HMS-2#WPBF 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-2#WPBF?
For technical support, including LTC4368HMS-2#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368HMS-2#WPBF requirements.
6.How does Aetrix verify that LTC4368HMS-2#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC4368HMS-2#WPBF 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-2#WPBF meets industry standards.
7.What is the process for return or replacement of LTC4368HMS-2#WPBF?
All LTC4368HMS-2#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368HMS-2#WPBF, 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-2#WPBF part is unused and in its original packaging.
Return procedure for LTC4368HMS-2#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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