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Analog Devices Inc. LTC4380IMS-2#TRPBF
- Part No.:
- LTC4380IMS-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380IMS-2#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,296
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Product details
Overview
LTC4380IMS-2#TRPBF from Analog Devices is a low-quiescent-current (8µA) surge stopper IC that controls an external N-channel MOSFET to protect downstream loads from automotive load dump, reverse battery, and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, adjustable fault timing via TMR capacitor, and operates across 4V–72V input with –40°C to +85°C industrial temperature range. Used in 12V/24V vehicle power distribution systems requiring robust transient suppression.
For engineers reviewing the LTC4380IMS-2#TRPBF datasheet, LTC4380IMS-2#TRPBF pinout, LTC4380IMS-2#TRPBF application, or LTC4380IMS-2#TRPBF equivalent, this page delivers verified specifications, validated MSOP-10 package details, confirmed AEC-Q100 qualification for automotive use, and real-world design values for gate drive compliance, current limit accuracy, and fault timer behavior under MOSFET stress conditions.
Technical Context
The LTC4380IMS-2#TRPBF implements a multiplier-based fault timer where TMR pin current scales with both VDS (via DRN pin) and ID (via SNS–OUT voltage), enabling dynamic SOA protection proportional to MOSFET power dissipation. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V, while dual gate clamp options (31.5V/50V referenced to GND) are selected by SEL pin state - grounded for 31.5V, tied to VCC for 50V.
This variant (–2 suffix) supports auto-retry fault recovery: after TMR reaches 1.215V and shuts off the MOSFET, it enters a cool-down phase with 2µA TMR pull-up/pull-down, cycling 15 times between 3.4V and 1.215V before discharging to 100mV and re-enabling GATE. Unlike latch-off variants (–1/–3), no ON pin reset pulse or power cycle is required for recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 8µA typical operating supply current - enables always-on battery-powered systems without significant drain. |
| Input Voltage Range | 4V to 72V - supports 12V and 24V/28V automotive systems and industrial supplies up to 72V. |
| Gate Clamp Options | 31.5V or 50V (SEL = GND or VCC) - sets output clamping at ~27V or ~45V respectively, matching 12V/24V system safety margins. |
| Current Limit Threshold | 50mV (SNS–OUT), rising to 62mV when OUT < 1.5V - provides accurate, adaptive short-circuit protection with enhanced stress handling. |
| Fault Timer Threshold | 1.215V on TMR pin - triggers MOSFET turn-off and FLT assertion; cool-down and auto-retry enabled per –2 configuration. |
| Reverse Input Protection | Withstands –60V on VCC - eliminates need for external reverse-battery diode in harsh automotive environments. |
| Package | 10-Lead MSOP - thermally enhanced surface-mount package with exposed pad option; θJA = 160°C/W. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad (GND), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary ground return; exposed pad must be connected to PCB ground for thermal and electrical integrity. |
| VCC | Main Supply Input | Accepts 4V–72V input; withstands –60V reverse; internal clamps protect against transients beyond 80V. |
| OUT | Output Voltage Sense | Senses regulated output; bypassed with ≥22µF capacitor; internal clamp limits GATE–OUT to 17V. |
| SNS | Current Sense Input | Connects to high-side of sense resistor; monitors ΔVSNS for 50mV/62mV current limiting; ±5V absolute range. |
| DRN | MOSFET Drain–Source Monitor | Tracks VDS via external RDRN; generates TMR current proportional to MOSFET power dissipation. |
| GATE | N-Channel MOSFET Gate Driver | 20µA charge pump drives gate to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) or VCC + 13.5V. |
| ON | Enable/Shutdown Control | 1.05V threshold; open = enable; <0.99V = shutdown (6µA IQ); also serves as undervoltage detector. |
| SEL | Gate Clamp Voltage Select | GND = 31.5V clamp; VCC/OUT = 50V clamp - configures output clamping for 12V or 24V/28V systems. |
| TMR | Fault Timer Integration Node | Capacitor-to-ground sets fault timeout and cool-down period; 1.215V trip point initiates auto-retry sequence. |
| FLT | Open-Drain Fault Indicator | Pulls low during overvoltage/overcurrent faults; sinks up to 3mA; high-Z when active or recovering. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | Enables automatic restart after overvoltage/overcurrent events without manual reset or power cycle - critical for unattended automotive modules. |
| Adjustable MOSFET stress timing | TMR current scales with VDS × ID, shortening fault timeout under high-power dissipation to keep MOSFET within SOA limits. |
| Reverse input protection to –60V | Eliminates need for series Schottky diode, reducing voltage drop, heat, and BOM count in battery-connected systems. |
| Low 8µA operating current | Supports always-on vehicle subsystems (e.g., telematics, alarm controllers) with minimal battery drain over extended idle periods. |
| AEC-Q100 qualified (Grade I) | Validated for –40°C to +85°C operation with automotive-grade reliability testing - suitable for engine bay and cabin electronics. |
Applications
| Automotive Load Dump Protection | Industrial Power Rail Conditioning |
|---|---|
|
Use Scenario: Protecting infotainment head units and ADAS ECUs from 12V system load dump transients up to 250V peak. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET to clamp output at 27V during 100ms surges. Use Value: Prevents damage to downstream 3.3V/5V regulators and microcontrollers without derating or oversized TVS devices. |
Use Scenario: Securing programmable logic controllers (PLCs) powered from unregulated 24V DC rails subject to switching spikes. IC Role / Device Role / Timing Role: High-side switch with adjustable current limit and dynamic fault timing to sustain brief overloads. Use Value: Enables reliable operation under intermittent motor-start surges while avoiding nuisance shutdowns during normal transients. |
| Battery-Powered Telematics Module | Hot-Swap Backplane Interface |
|
Use Scenario: Maintaining GPS/cellular connectivity in fleet tracking devices during vehicle ignition cycles and deep-sleep states. IC Role / Device Role / Timing Role: Always-on power supervisor with 6µA shutdown current and reverse-battery immunity. Use Value: Extends battery life >5 years in maintenance-free deployments while surviving jump-start polarity reversals. |
Use Scenario: Enabling safe insertion/removal of line cards in telecom or data center backplanes with live 48V power. IC Role / Device Role / Timing Role: Controlled high-side switch with soft-start ramp and current-limited turn-on to suppress inrush. Use Value: Prevents bus voltage sag and arcing during hot-swap events, meeting IEC 61000-4-5 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380IMS-1#TRPBF | Latch-off fault behavior (no auto-retry); identical pinout, specs, and package. | Requires ON pin reset pulse or power cycle after fault - suited for safety-critical systems needing explicit operator intervention. | Select when deterministic fault lockout is required; avoid if autonomous recovery is needed. |
| LTC4380HMS-2#TRPBF | Extended temperature range (–40°C to +125°C); otherwise identical functionality and pin compatibility. | Rated for under-hood automotive locations with higher ambient temperatures; same auto-retry behavior. | Choose for engine control units or ADAS sensors operating above +85°C ambient. |
Compared with LTC4380IMS-2#TRPBF, the IMS-1 offers fail-safe latching but requires external reset, while the HMS-2 extends thermal capability without altering fault response - making IMS-2 optimal for cabin-mounted modules needing hands-free recovery within industrial temperature limits.
Availability
LTC4380IMS-2#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial power rail conditioning, and battery-powered telematics modules requiring stable component supply across production lifecycles.
Supply support for LTC4380IMS-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets.
The LTC4380 product line delivers robust, low-IQ surge protection ICs designed specifically for automotive and industrial power systems requiring reliable overvoltage, overcurrent, and reverse-polarity resilience without external complexity.
FAQ
What is the gate clamp voltage configuration for LTC4380IMS-2#TRPBF?
The LTC4380IMS-2#TRPBF supports two fixed gate clamp voltages: 31.5V when the SEL pin is grounded, and 50V when SEL is tied to VCC or OUT. This directly determines output clamping at ~27V or ~45V respectively, aligning with 12V and 24V/28V automotive system safety thresholds. The clamp is referenced to GND and is internal - no external components are required to set these values.
How does the auto-retry feature work in LTC4380IMS-2#TRPBF during overvoltage events?
In LTC4380IMS-2#TRPBF, when the TMR pin charges to 1.215V due to overvoltage, the MOSFET turns off and FLT asserts low. The device then enters a cool-down phase: TMR cycles 15 times between 3.4V and 1.215V using 2µA pull-up/pull-down currents, finally discharging to 100mV before automatically re-enabling GATE. No ON pin pulse or power cycle is needed - enabling fully autonomous recovery.
Can LTC4380IMS-2#TRPBF be used with reverse battery input?
Yes - LTC4380IMS-2#TRPBF withstands –60V on the VCC pin without damage, enabling direct connection to vehicle batteries without external reverse-polarity protection diodes. This eliminates forward voltage drop, conduction losses, and thermal concerns associated with Schottky solutions, while maintaining full functionality during jump-start scenarios.
What is the minimum recommended output capacitance for LTC4380IMS-2#TRPBF?
LTC4380IMS-2#TRPBF requires a minimum of 22µF ceramic or polymer capacitor placed directly at the OUT pin, as close as possible to the package. This stabilizes the output voltage sense node, ensures proper current limit amplifier response, and prevents oscillation during fast load transients. Lower values risk instability and inaccurate current limiting.
Is LTC4380IMS-2#TRPBF AEC-Q100 qualified?
Yes - LTC4380IMS-2#TRPBF is AEC-Q100 qualified for Grade I (–40°C to +85°C), with full automotive reliability testing including HTOL, TC, UHAST, and ESD. It is designated for automotive applications in passenger compartments and non-engine-bay locations, and carries the #TRPBF tape-and-reel packaging compliant with automotive logistics standards.
LTC4380IMS-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
LTC4380IMS-2#TRPBF FAQ
1.How can I place an order for LTC4380IMS-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380IMS-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 LTC4380IMS-2#TRPBF reliable?
The price and inventory of LTC4380IMS-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 LTC4380IMS-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380IMS-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380IMS-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380IMS-2#TRPBF?
LTC4380IMS-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380IMS-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 LTC4380IMS-2#TRPBF?
For technical support, including LTC4380IMS-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380IMS-2#TRPBF requirements.
6.How does Aetrix verify that LTC4380IMS-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380IMS-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 LTC4380IMS-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380IMS-2#TRPBF?
All LTC4380IMS-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380IMS-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 LTC4380IMS-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380IMS-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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