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Analog Devices Inc. LTC4380HMS-2#WPBF
- Part No.:
- LTC4380HMS-2#WPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-2#WPBF.pdf
- Description:
- L Q C SURGE STOPPER
- Quantity:
- Payment:
- Shipping:
Inventory:1,026
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Product details
Overview
LTC4380HMS-2#WPBF from Analog Devices is a low-quiescent-current surge stopper IC that controls an external N-channel MOSFET to protect downstream loads from automotive load dump, reverse polarity, and overcurrent events. It features 8µA operating current, 31.5V/50V selectable gate clamp, –40°C to 125°C operating range, and auto-retry fault behavior - deployed in 12V/24V automotive power distribution modules.
For engineers reviewing the LTC4380HMS-2#WPBF datasheet, LTC4380HMS-2#WPBF pinout, LTC4380HMS-2#WPBF application, or LTC4380HMS-2#WPBF equivalent, key selection criteria include gate clamp voltage selectability (SEL pin), TMR-based MOSFET stress acceleration, reverse input protection to –60V, and AEC-Q100 qualification for under-hood use.
Technical Context
The LTC4380HMS-2#WPBF implements a multiplier-based fault timer where TMR pin current scales with both VDS (via DRN pin) and ID (via SNS–OUT differential), enabling dynamic SOA protection. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V, while dual gate clamp options (31.5V/50V) are selected via SEL pin logic level.
It supports latchoff or auto-retry behavior per variant: LTC4380HMS-2#WPBF uses auto-retry with 2µA cool-down current on TMR and 100mV restart threshold. ON pin serves dual role - undervoltage detection (1.05V threshold) and shutdown control - reducing quiescent current to 6µA in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Current | 8 µA typical at 12V - enables always-on battery-powered systems without excessive drain. |
| Gate Clamp Voltage | Selectable 31.5V (SEL = GND) or 50V (SEL = VCC) - sets output clamping at ~27V or ~45V for 12V/24V systems. |
| Input Voltage Range | 4V to 72V continuous - covers automotive cold-crank (4V) to load dump (72V) transients. |
| Reverse Input Protection | Withstands –60V reverse supply - eliminates need for external Schottky diode in bidirectional protection schemes. |
| Fault Timer Behavior | Auto-retry with adjustable CTMR; cool-down phase ensures MOSFET thermal recovery before restart. |
| Temperature Grade | H-grade (–40°C to +125°C) - qualified for engine compartment and industrial high-temp environments. |
| AEC-Q100 Qualification | Qualified per AEC-Q100 Rev H - meets automotive reliability requirements for safety-critical power rails. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 0.5mm pitch). Exposed pad (Pin 11) is GND and may be connected to PCB ground plane for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary return path for internal bias and gate drive; exposed pad must be tied to system ground for thermal stability. |
| VCC | Positive Supply Input | Accepts 4V–72V input; withstands –60V reverse; requires Zener clamp above 80V for transient protection. |
| OUT | Output Voltage Sense | Senses post-MOSFET output; internal clamp limits GATE–OUT to 17V; bypass with ≥22µF ceramic capacitor. |
| SNS | Current Sense Input | Monitors voltage drop across external sense resistor; regulates ΔVSNS to 50mV (62mV during severe short). |
| DRN | MOSFET Drain–Source Sense | Tracks VDS via external RDRN; generates proportional current into multiplier for MOSFET stress timing. |
| GATE | N-Channel MOSFET Gate Driver | 20µA regulated charge pump drives gate to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) or VCC + 13.5V. |
| ON | Enable / UVLO / Shutdown Control | 1.05V threshold; open-drain compatible; pulls part into 6µA shutdown when <0.99V; monitors input undervoltage. |
| SEL | Gate Clamp Voltage Select | GND = 31.5V clamp (for 12V systems); VCC = 50V clamp (for 24V/28V systems); unused for LTC4380-3/-4 variants. |
| TMR | Fault Timer Integration Node | Capacitor-connected node; charges with MOSFET-power-proportional current; trips at 1.215V; cools down to 100mV for auto-restart. |
| FLT | Open-Drain Fault Indicator | Pulls low during overvoltage/overcurrent fault; sinks up to 3mA; high-impedance otherwise; used for system-level fault signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA operating current | Enables direct connection to vehicle battery without compromising sleep-mode current budgets in always-on ECUs. |
| Selectable 31.5V/50V gate clamp | Allows single BOM to support both 12V and 24V platforms by changing SEL pin routing - no redesign needed. |
| Auto-retry fault response (LTC4380-2) | Permits automatic recovery after transient surges (e.g., ignition noise) without host MCU intervention or power cycle. |
| Reverse input protection to –60V | Eliminates external reverse-polarity diode, reducing forward drop, heat, and board space in dual-battery or jump-start scenarios. |
| MOSFET stress-accelerated timing | TMR current scales with VDS × ID, shortening fault timeout during high-power dissipation - protects MOSFET within SOA. |
Applications
| Automotive Load Dump Protection | Hot-Swap Power Distribution |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS cameras from ISO 7637-2 Pulse 5a/b load dump transients up to 120V peak. IC Role / Device Role / Timing Role: Surge stopper controlling high-side N-MOSFET; clamps output to 27V using 31.5V gate clamp and SEL = GND. Use Value: Prevents damage to 3.3V/5V downstream regulators and avoids costly TVS arrays on every rail. |
Use Scenario: Enabling safe insertion/removal of PCIe backplane cards or modular sensor nodes in powered-backplane systems. IC Role / Device Role / Timing Role: High-side switch with controlled turn-on slew rate (via GATE drive current) and inrush limiting. Use Value: Eliminates bus glitches and contact arcing; supports IEEE 1602.1 compliance without custom sequencing logic. |
| Battery-Powered Telematics | Industrial 24V PLC I/O Protection |
Use Scenario: Maintaining GPS/GNSS module operation during vehicle cranking (4.5V minimum) while blocking reverse battery faults. IC Role / Device Role / Timing Role: Always-on power supervisor with 6µA shutdown current and –60V reverse tolerance. Use Value: Extends backup battery life >10× vs. discrete solutions; enables 10-year field deployment without maintenance. |
Use Scenario: Protecting programmable logic controller analog I/O modules from 24V DC supply surges and wiring faults. IC Role / Device Role / Timing Role: Overvoltage/overcurrent protector with auto-retry (LTC4380HMS-2#WPBF) and 125°C ambient rating. Use Value: Reduces unplanned downtime by recovering automatically from transient line faults without operator reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380HDD-2#WPBF | Same functionality and specs, but in 3mm × 3mm DFN package - smaller footprint, better thermal performance via exposed pad soldering. | Preferred for space-constrained PCBs or higher-power derating needs; requires re-layout due to different pinout and land pattern. | Select when thermal management or board area is critical; verify layout compatibility with MSOP-to-DFN transition. |
| TPS26631RHFR | Integrated 60V eFuse with fixed 2.7A current limit and 1.2ms fast trip; no gate clamp or TMR-based stress acceleration. | Targets simpler overcurrent-only protection; lacks adjustable overvoltage clamping and reverse-input capability. | Choose for cost-sensitive, non-automotive designs where only current limiting is required and 125°C operation is not mandatory. |
Compared with LTC4380HMS-2#WPBF, LTC4380HDD-2#WPBF offers identical electrical behavior in a thermally superior DFN package, while TPS26631RHFR provides faster overcurrent response but omits gate-clamp-based overvoltage control and reverse polarity protection - making it unsuitable for full automotive load dump mitigation.
Availability
LTC4380HMS-2#WPBF is available at Aetrix Electronics and suitable for automotive power distribution, industrial 24V PLC I/O protection, and battery-backed telematics requiring stable component supply across extended temperature and AEC-Q100-compliant production cycles.
Supply support for LTC4380HMS-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The LTC4380 product line delivers robust, low-quiescent-current surge protection for harsh environments - designed specifically for automotive load dump, reverse battery, and hot-swap applications where reliability and wide temperature operation are mandatory.
FAQ
What is the gate clamp voltage configuration for LTC4380HMS-2#WPBF?
The LTC4380HMS-2#WPBF supports two fixed internal gate clamp voltages: 31.5V when the SEL pin is tied to GND (for 12V systems), and 50V when SEL is tied to VCC (for 24V/28V systems). This directly determines output clamping at ~27V or ~45V respectively, and is confirmed in the device's Electrical Characteristics table and Pin Functions section.
Does LTC4380HMS-2#WPBF support auto-retry after overvoltage fault?
Yes, LTC4380HMS-2#WPBF implements auto-retry behavior. Upon TMR reaching 1.215V, the MOSFET turns off and FLT asserts low; then TMR enters a cool-down phase with 2µA pull-down current until it discharges to 100mV, at which point the device automatically restarts - no external reset required.
What is the maximum reverse input voltage the LTC4380HMS-2#WPBF can withstand?
The LTC4380HMS-2#WPBF is rated for –60V reverse input voltage on the VCC pin, verified in Absolute Maximum Ratings and confirmed in Reverse Current vs Reverse Voltage characterization graphs. This enables direct reverse-polarity protection without external diodes in automotive and industrial 24V systems.
How does the TMR pin current scale with MOSFET stress in LTC4380HMS-2#WPBF?
In LTC4380HMS-2#WPBF, TMR pin current is generated by an internal multiplier whose inputs are DRN pin current (proportional to VDS) and SNS–OUT differential voltage (proportional to ID). This makes TMR current approximately proportional to instantaneous MOSFET power dissipation, accelerating fault timeout under high-stress conditions.
Is LTC4380HMS-2#WPBF qualified for automotive applications?
Yes, LTC4380HMS-2#WPBF carries the #WPBF suffix indicating Automotive grade with AEC-Q100 qualification (H-grade, –40°C to +125°C), documented in the Order Information table and Applications section. It is explicitly designated for automotive/avionic surge protection per Analog Devices' automotive product policy.
LTC4380HMS-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
LTC4380HMS-2#WPBF FAQ
1.How can I place an order for LTC4380HMS-2#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-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 LTC4380HMS-2#WPBF reliable?
The price and inventory of LTC4380HMS-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 LTC4380HMS-2#WPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-2#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-2#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-2#WPBF?
LTC4380HMS-2#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-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 LTC4380HMS-2#WPBF?
For technical support, including LTC4380HMS-2#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-2#WPBF requirements.
6.How does Aetrix verify that LTC4380HMS-2#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-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 LTC4380HMS-2#WPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-2#WPBF?
All LTC4380HMS-2#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-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 LTC4380HMS-2#WPBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-2#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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