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Analog Devices Inc. LTC4380HMS-2#TRPBF
- Part No.:
- LTC4380HMS-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-2#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,982
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Product details
Overview
LTC4380HMS-2#TRPBF 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 input, overvoltage (up to 250Vpk), and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, 8µA operating current, –40°C to 125°C operating range, and auto-retry fault behavior. Used in 12V/24V automotive power rails with 1A output capability.
For engineers reviewing the LTC4380HMS-2#TRPBF datasheet, LTC4380HMS-2#TRPBF pinout, LTC4380HMS-2#TRPBF application, or LTC4380HMS-2#TRPBF equivalent, key selection criteria include gate clamp voltage configurability (31.5V/50V), TMR-based MOSFET stress acceleration, reverse input protection to –60V, latchoff vs. auto-retry behavior, and AEC-Q100 qualification for under-hood deployment.
Technical Context
The LTC4380HMS-2#TRPBF 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 proportional to MOSFET power dissipation. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V during normal operation, while clamping GATE to either 31.5V or 50V referenced to GND depending on SEL pin state.
It supports two distinct fault recovery modes: LTC4380-2 variants (including this part) enter a cool-down phase after fault timeout-TMR discharges through 2µA pull-down, then recharges 15 times between 1.215V and 3.4V before automatic restart-whereas LTC4380-1 latches off until ON pin reset. The ON pin serves dual function: undervoltage detection (1.05V threshold) and shutdown control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input; supports 12V/24V/28V automotive systems with up to 250Vpk transient tolerance |
| Quiescent Current | 8µA typical at 25°C; enables always-on battery-powered applications without excessive drain |
| Gate Clamp Options | Selectable 31.5V (SEL = GND) or 50V (SEL = VCC); sets max output clamp ≈27V or ≈45V respectively |
| Fault Timer Behavior | Auto-retry mode with adjustable CTMR; cool-down period prevents thermal runaway during repeated faults |
| Reverse Input Protection | Withstands –60V reverse battery condition; eliminates need for external Schottky diode |
| Current Limit Threshold | 50mV (OUT > 3V) rising to 62mV (OUT < 1.5V); provides tighter short-circuit protection at low output |
| Temperature Grade | H-grade: –40°C to +125°C ambient; qualified per AEC-Q100 for automotive under-hood use |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 0.5mm pitch). Exposed pad (not electrically connected by default) may be tied to GND for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRN | VDS sense input | Tracks OUT; current through RDRN proportional to MOSFET VDS, feeds multiplier for stress-accelerated timing |
| GATE | N-MOSFET gate driver | Regulated 20µA charge pump drives gate; clamped to 31.5V/50V (SEL-dependent) or VCC+13.5V |
| SNS | Current sense input | Monitors voltage drop across sense resistor; controls GATE to maintain ΔVSNS = 50mV/62mV |
| OUT | Output voltage sense | Reference point for SNS, GATE regulation, and internal clamps; bypass with ≥22µF ceramic |
| VCC | Supply input | 4V–72V operating range; withstands –60V reverse; requires Zener clamp above 80V |
| ON | Enable/UV detect input | 1.05V threshold; open = enabled; <1V = shutdown (6µA IQ); also resets latched faults |
| FLT | Open-drain fault indicator | Pulls low when TMR reaches 1.215V; sinks up to 3mA; signals active overvoltage/overcurrent |
| SEL | Gate clamp select | GND = 31.5V clamp; VCC/OUT = 50V clamp; ignored on LTC4380-3/4 variants |
| TMR | Fault timer integrator | Capacitor-connected node; current scales with MOSFET power; 1.215V trip threshold |
| GND | Device ground | Reference for all analog circuitry; exposed pad may be connected here for thermal relief |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | Enables autonomous system recovery after transient overvoltage without host intervention or power cycle |
| Reverse input protection to –60V | Eliminates series Schottky diode, reducing forward drop, heat, and board space in battery-input designs |
| Adjustable fault timing with MOSFET stress acceleration | TMR current increases with VDS × ID, shortening timeout during high-power faults to keep MOSFET within SOA |
| Low 8µA operating current | Supports permanent connection to vehicle battery without unacceptable parasitic drain in sleep mode |
| AEC-Q100 qualified H-grade | Validated for automotive under-hood environments including extended temperature, vibration, and ESD stress |
Applications
| Automotive Load Dump Protection | Hot-Swap Power Rail |
|---|---|
Use Scenario: Protecting infotainment ECUs and ADAS sensors from 12V system load dump transients up to 250Vpk during alternator regulation failure. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET as high-side switch; clamps output to 27V using 31.5V gate clamp (SEL = GND). Use Value: Prevents damage to downstream 28V-rated components while maintaining uninterrupted operation during sub-100ms surges. | Use Scenario: Enabling safe insertion/removal of PCIe cards or modular compute blades into live backplanes with 12V/24V supply rails. IC Role / Device Role / Timing Role: Inrush current limiter and overcurrent protector; uses SNS–OUT sensing and TMR-based adaptive timing to avoid nuisance trips during capacitive loading. Use Value: Limits peak inrush to <1A during hot-plug, avoids bus brownout, and sustains operation during brief overloads. |
| Reverse Battery Protection | Industrial 24V Power Distribution |
Use Scenario: Guarding telematics modules and gateway ECUs against accidental reverse battery connection in service workshops. IC Role / Device Role / Timing Role: Reverse polarity blocker using back-to-back N-MOSFET configuration driven by GATE pin; leverages –60V VCC rating. Use Value: Eliminates need for bulky, lossy series diodes; maintains <50mΩ effective resistance in forward direction. | Use Scenario: Providing robust 24V power to PLC I/O modules in factory automation where lightning-induced surges and cable ESD are common. IC Role / Device Role / Timing Role: Overvoltage supervisor and current limiter; configured for 50V gate clamp (SEL = VCC) to sustain 45V output during 60V transients. Use Value: Maintains 24V rail integrity during 100V/1ms surges per IEC 61000-4-5 Level 3, avoiding controller resets. |
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#TRPBF | Same electrical specs and functionality; differs only in 10-lead DFN (3mm × 3mm) package instead of MSOP | Preferred for space-constrained PCBs where thermal pad soldering and lower profile are critical | Select when board layout favors DFN's smaller footprint and enhanced thermal performance via exposed pad soldering |
| TPS26631PWPR | Lower 60V max input; no selectable gate clamp; fixed 28V output limit; integrated MOSFET; no DRN-based stress acceleration | Better suited for compact, cost-sensitive industrial supplies without automotive transients | Choose only if input stays ≤60V and design does not require adaptive MOSFET SOA protection or –60V reverse tolerance |
Compared with LTC4380HMS-2#TRPBF, the LTC4380HDD-2#TRPBF offers identical surge protection intelligence in a thermally superior DFN package, while the TPS26631PWPR trades flexibility and ruggedness for integration and lower BOM count in non-automotive applications.
Availability
LTC4380HMS-2#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, industrial PLC power distribution, and battery-backed IoT gateways requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LTC4380HMS-2#TRPBF 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 precision instrumentation, industrial automation, communications, and automotive markets.
The LTC4380 product line delivers intelligent surge protection for harsh environments, specifically engineered to replace discrete TVS-diode/MOSFET solutions with integrated fault timing, reverse polarity blocking, and AEC-Q100-compliant operation.
FAQ
What is the maximum input voltage the LTC4380HMS-2#TRPBF can withstand during a load dump event?
The LTC4380HMS-2#TRPBF itself operates from 4V to 72V, but protects downstream loads from input surges up to 250Vpk-as demonstrated in its typical 12V/1A application limiting output to 27V. This is achieved by clamping the external MOSFET's gate voltage (31.5V or 50V), thereby limiting VOUT to ~27V or ~45V. The MOSFET's voltage rating-not the LTC4380HMS-2#TRPBF's-determines ultimate surge withstand capability.
How does the LTC4380HMS-2#TRPBF differ from the LTC4380HMS-1#TRPBF?
The LTC4380HMS-2#TRPBF implements auto-retry fault behavior: after TMR timeout, it enters a cool-down phase and automatically restarts once TMR discharges to 100mV. In contrast, the LTC4380HMS-1#TRPBF latches off permanently until ON pin is pulsed low for ≥100µs or power is cycled. Both share identical gate clamp options (31.5V/50V) and H-grade temperature range.
Can the LTC4380HMS-2#TRPBF be used with a P-channel MOSFET?
No-the LTC4380HMS-2#TRPBF is designed exclusively for N-channel MOSFETs configured as high-side switches. Its GATE driver is a regulated charge pump referenced to OUT, optimized to drive N-MOSFET gates above source potential. Driving a P-MOSFET would require inverted logic, negative gate drive, and different sensing topology-none of which the LTC4380HMS-2#TRPBF supports.
What is the purpose of the DRN pin on the LTC4380HMS-2#TRPBF?
The DRN pin on the LTC4380HMS-2#TRPBF senses the voltage difference between the external MOSFET's drain and source (VDS). Current sourced from DRN through RDRN is multiplied internally with SNS–OUT current to generate a TMR pin current proportional to instantaneous MOSFET power dissipation-enabling faster fault timeout during high-stress conditions and improving SOA compliance.
Is the LTC4380HMS-2#TRPBF pin-compatible with other LTC4380 variants in the same package?
Yes-LTC4380HMS-1#TRPBF, LTC4380HMS-2#TRPBF, LTC4380HMS-3#TRPBF, and LTC4380HMS-4#TRPBF are fully pin-compatible in the 10-lead MSOP package. Functionality differences (gate clamp type, fault behavior) are determined solely by part number suffix (-1/-2/-3/-4) and SEL pin configuration-not pinout or package.
LTC4380HMS-2#TRPBF 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:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC4380HMS-2#TRPBF FAQ
1.How can I place an order for LTC4380HMS-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-2#TRPBF 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#TRPBF reliable?
The price and inventory of LTC4380HMS-2#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-2#TRPBF?
LTC4380HMS-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-2#TRPBF 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#TRPBF?
For technical support, including LTC4380HMS-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-2#TRPBF requirements.
6.How does Aetrix verify that LTC4380HMS-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-2#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-2#TRPBF?
All LTC4380HMS-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-2#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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