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Analog Devices Inc. LTC4368HMS-2#WTRPBF
- Part No.:
- LTC4368HMS-2#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4368HMS-2#WTRPBF.pdf
- Description:
- 100V UV/OV & REVERSE PROT CNTR W
- Quantity:
- Payment:
- Shipping:
Inventory:2,452
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Product details
Overview
LTC4368HMS-2#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 operates from 2.5V to 60V input, provides ±100V/–40V fault protection, features –3mV reverse current sensing, 80µA operating current, and AEC-Q100 H-grade (–40°C to 125°C) qualification - deployed in automotive surge protection and energy storage systems.
For engineers reviewing the LTC4368HMS-2#WTRPBF datasheet, LTC4368HMS-2#WTRPBF pinout, LTC4368HMS-2#WTRPBF application, or LTC4368HMS-2#WTRPBF equivalent, this page delivers verified functional identity, validated MSOP-10 pin roles, confirmed –3mV reverse overcurrent threshold, exact thermal grade specification, and two rigorously cross-checked alternative parts with documented technical divergence.
Technical Context
The LTC4368HMS-2#WTRPBF integrates dual precision comparators (±1.5% UV/OV thresholds with 25mV hysteresis), bidirectional current sense amplifiers (50mV forward / –3mV reverse trip), and a charge-pump-based gate driver delivering up to 13.1V enhancement above VOUT. Its 32ms turn-on delay debounces live inputs and blocks 50/60Hz AC power.
It controls external N-MOSFET pairs using GATE output with fast (60mA) and slow (90µA) pull-down paths, supports RETRY-configurable auto-retry or latch-off on forward overcurrent, and re-enables after reverse faults only when VIN – VOUT ≥ 75mV (typical). All logic operates with <5µA shutdown current and tolerates –40V to 100V at 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 surges. |
| Reverse Current Threshold | –3mV (SENSE – VOUT) - optimized for low-loss reverse polarity detection in high-current paths without added voltage drop. |
| UV/OV Threshold Accuracy | ±1.5% with 25mV hysteresis - ensures stable windowed supply validation under temperature drift and noise. |
| Operating Current | 80µA typical - minimizes quiescent load in always-on automotive modules and battery-backed systems. |
| Gate Drive Enhancement | Up to 13.1V above VOUT - fully enhances standard logic-level N-MOSFETs even at low VIN (2.5V). |
| Temperature Grade | –40°C to 125°C (H-grade) - qualified per AEC-Q100 for under-hood automotive and industrial control applications. |
| Package | 10-Lead Plastic MSOP (LTGTJ marking) - surface-mount compatible with standard reflow profiles and IPC-compliant layout. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 0.5mm pitch), exposed pad optional for thermal relief or grounding. Pinout validated per Analog Devices Rev. C datasheet (Page 2, MS10 TOP VIEW).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | Gate drive output | Drives back-to-back N-MOSFET gates with charge-pump-enhanced voltage up to VIN + 14V; fast/slow turn-off paths ensure controlled disconnect. |
| SENSE | Bidirectional current sense input | Detects forward (+50mV) and reverse (–3mV) overcurrent via external RSENSE; enables true bidirectional fault isolation. |
| VOUT | Output voltage sense reference | Serves as gate drive return and reverse fault comparator reference; requires ≥1µF local bypass to GND. |
| FAULT | Open-drain fault indicator | Pulled low on UV/OV/current fault or SHDN assertion; supports system-level fault logging and sequencing. |
| SHDN | Shutdown control input | Active-low enable; toggling clears latched forward overcurrent faults and reduces current to 5µA. |
| VIN | Main supply input | Accepts –40V to 100V; includes 2.2V UVLO and hot-swap capability; withstands automotive load-dump transients. |
| UV | Undervoltage comparator input | Configures lower supply limit via resistive divider; 0.5V internal threshold with ±10nA leakage enables high-R networks. |
| OV | Overvoltage comparator input | Configures upper supply limit via resistive divider; identical 0.5V threshold and leakage spec as UV pin. |
| RETRY | Forward OC recovery mode select | Ground = latch-off; capacitor = auto-retry (e.g., 22nF → 120ms cooldown); defines system fail-safe behavior. |
| GND | Device ground reference | Return path for all internal circuits; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional overcurrent protection | Separate +50mV (forward) and –3mV (reverse) thresholds enable precise, low-dropout fault detection in both power flow directions. |
| AC line blocking | 32ms turn-on delay prevents 50/60Hz AC coupling through MOSFET body diodes - eliminates need for external rectification in dual-supply systems. |
| Reverse battery protection | Automatic gate disconnection at –40V input and re-enable only after VIN – VOUT ≥ 75mV - prevents damage during incorrect battery installation. |
| Adjustable UV/OV window | Two independent comparator inputs (UV/OV) with ±1.5% accuracy allow user-defined supply validity windows without trimming. |
| AEC-Q100 H-grade qualification | Rated for –40°C to 125°C ambient with full electrical specs guaranteed - meets automotive under-hood and industrial control reliability requirements. |
| Low-power shutdown mode | 5µA shutdown current enables long-term battery backup in telematics, ECU keep-alive, and energy storage BMS monitoring circuits. |
Applications
| Automotive Power Input Protection | Industrial Energy Storage Interface |
|---|---|
|
Use Scenario: Protecting infotainment head units and ADAS ECUs from reverse battery jump-starts, load-dump transients (up to +100V), and undervoltage brownouts. IC Role / Device Role / Timing Role: UV/OV window monitor and bidirectional circuit breaker controlling back-to-back N-MOSFETs; enforces 32ms debounce before enabling power. Use Value: Prevents catastrophic MOSFET failure and PCB trace vaporization during –40V reverse connection or +100V ISO 7637-2 pulse 5a events. |
Use Scenario: Safeguarding lithium-ion battery management systems (BMS) during charge/discharge cycles where current flows bidirectionally between grid and battery stack. IC Role / Device Role / Timing Role: Reverse current detector (–3mV threshold) and forward OC protector (50mV) for high-side isolation; coordinates with external MOSFET drivers. Use Value: Enables accurate low-loss reverse current detection without shunt resistor polarity reversal - critical for regenerative braking and bidirectional DC-DC converters. |
| Hot-Swappable Industrial Power Module | Portable Test Instrumentation Supply |
|
Use Scenario: Enabling safe insertion/removal of modular power supplies in programmable logic controllers (PLCs) without system reset or bus contention. IC Role / Device Role / Timing Role: Hot-swap controller with SHDN-toggled fault clearance and RETRY-configurable auto-retry - manages inrush and transient overloads. Use Value: Eliminates manual power cycling; allows field technicians to replace failed modules while system remains operational. |
Use Scenario: Powering handheld oscilloscopes and multimeters from interchangeable LiPo packs or bench supplies with mixed polarity connectors. IC Role / Device Role / Timing Role: Polarity-agnostic input supervisor that blocks –40V reverse and validates 2.5–60V supply range before enabling load. Use Value: Prevents instrument damage from accidental reverse battery insertion or miswired bench adapters - reducing field returns and calibration downtime. |
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#WTRPBF | Same functionality and –3mV reverse threshold, but in 3mm × 3mm DFN package (LGTK marking) instead of MSOP. | DFN offers better thermal performance (θJA = 43°C/W vs. 160°C/W) and smaller footprint; less suitable for hand-soldering or high-vibration environments. | Select for space-constrained PCBs requiring enhanced thermal dissipation; verify mechanical mounting and reflow profile compatibility. |
| TPS26632RGER | Single-direction (forward-only) protection IC with integrated 80mΩ FET; no reverse current sensing, no –40V reverse input rating. | Designed for USB PD and PoE-powered devices; lacks reverse polarity and AC-blocking capability of LTC4368HMS-2#WTRPBF. | Choose only if application requires forward-only protection with integrated FET and lower BOM count; not suitable for automotive reverse-battery scenarios. |
Compared with LTC4368HDD-2#WTRPBF, the LTC4368HMS-2#WTRPBF trades thermal efficiency for mechanical robustness and ease of assembly; versus TPS26632RGER, it delivers true bidirectional fault coverage essential for automotive and energy storage, at the cost of external MOSFET design effort.
Availability
LTC4368HMS-2#WTRPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial energy storage interfaces, and hot-swappable power modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4368HMS-2#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, Inc. 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 demanding environments - designed specifically to replace discrete protection circuits in automotive ECUs, energy storage systems, and ruggedized industrial equipment.
FAQ
What is the reverse current sensing threshold for LTC4368HMS-2#WTRPBF?
The LTC4368HMS-2#WTRPBF uses a –3mV (SENSE – VOUT) threshold for reverse overcurrent detection, distinct from the –50mV threshold of the LTC4368-1 variant. This low-magnitude threshold enables sensitive reverse polarity fault detection without adding series resistance or compromising forward conduction efficiency in the external MOSFET path.
Does LTC4368HMS-2#WTRPBF support AEC-Q100 qualification?
Yes, LTC4368HMS-2#WTRPBF is AEC-Q100 qualified for automotive applications with H-grade temperature range (–40°C to 125°C). The "#W" suffix in the part number explicitly denotes automotive-grade manufacturing control, including stress testing, reliability reporting, and lot traceability per AEC-Q100 Rev H requirements.
How does the 32ms turn-on delay function in LTC4368HMS-2#WTRPBF?
The 32ms turn-on delay in LTC4368HMS-2#WTRPBF acts as a hardware debounce timer: after UV/OV faults clear or SHDN is asserted high, the GATE driver remains inactive for ~32ms before enabling the external MOSFETs. This prevents chattering during noisy supply transitions and inherently blocks 50Hz/60Hz AC power by ensuring the input remains stable longer than one AC cycle.
Can LTC4368HMS-2#WTRPBF protect against –40V reverse supply conditions?
Yes, LTC4368HMS-2#WTRPBF is rated for –40V reverse input protection at VIN. When VIN goes negative, the internal circuitry automatically connects GATE to VIN and disables the charge pump, ensuring the back-to-back N-MOSFETs remain fully off. Recovery occurs only after VOUT falls 100mV below VIN, preventing premature reconnection.
What package type and marking correspond to LTC4368HMS-2#WTRPBF?
LTC4368HMS-2#WTRPBF uses the 10-Lead Plastic MSOP package with LTGTJ laser marking on the top surface. This matches the "HMS-2" designation (H-grade, MSOP, –3mV variant) and "#WTRPBF" suffix indicating automotive qualification, tape-and-reel packaging, and lead-free finish per JEDEC J-STD-020.
LTC4368HMS-2#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-2#WTRPBF FAQ
1.How can I place an order for LTC4368HMS-2#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4368HMS-2#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-2#WTRPBF reliable?
The price and inventory of LTC4368HMS-2#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-2#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC4368HMS-2#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4368HMS-2#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4368HMS-2#WTRPBF?
LTC4368HMS-2#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4368HMS-2#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-2#WTRPBF?
For technical support, including LTC4368HMS-2#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4368HMS-2#WTRPBF requirements.
6.How does Aetrix verify that LTC4368HMS-2#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4368HMS-2#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-2#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC4368HMS-2#WTRPBF?
All LTC4368HMS-2#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4368HMS-2#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-2#WTRPBF part is unused and in its original packaging.
Return procedure for LTC4368HMS-2#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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