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Analog Devices Inc. LTC4380IMS-2#PBF
- Part No.:
- LTC4380IMS-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380IMS-2#PBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:209
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Product details
Overview
LTC4380IMS-2#PBF 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, and auto-retry fault behavior - enabling robust 12V/24V automotive power rail protection in battery-powered systems.
For engineers reviewing the LTC4380IMS-2#PBF datasheet, LTC4380IMS-2#PBF pinout, LTC4380IMS-2#PBF application, or LTC4380IMS-2#PBF equivalent, key selection criteria include its –40°C to 85°C industrial temperature grade, MSOP-10 package, adjustable fault timer with MOSFET stress acceleration, reverse input protection to –60V, and latchoff vs. auto-retry behavior distinction among LTC4380 variants.
Technical Context
The LTC4380IMS-2#PBF implements a multiplier-based fault timer where TMR pin current scales with both VDS (via DRN pin) and ID (via SNS–OUT differential), dynamically shortening turn-off time under high MOSFET power dissipation. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V, while dual gate clamp options (31.5V/50V via SEL pin) enable system-specific output voltage limiting.
It supports auto-retry operation: after fault-induced shutdown, it enters a cool-down phase (TMR pin cycled between 1.215V and 3.4V for 15 cycles), then automatically restarts when TMR discharges to 100mV - unlike latchoff versions (e.g., LTC4380IMS-1#PBF) requiring ON pin reset or power cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Current | 8µA typical at 12V - enables always-on automotive modules without excessive battery drain. |
| Input Voltage Range | 4V to 72V - supports 12V and 24V vehicle architectures, including cold-crank and load-dump transients. |
| Gate Clamp Options | 31.5V (SEL = GND) or 50V (SEL = VCC) - sets output clamping at ~27V or ~45V respectively for 12V/24V systems. |
| Fault Behavior | Auto-retry with cool-down - eliminates manual reset requirement and enables autonomous recovery after transient faults. |
| Reverse Input Protection | Withstands –60V on VCC - protects against reverse battery connection without external diodes. |
| Current Limit Threshold | 50mV (rising), 62mV (severe short, OUT < 1.5V) - provides precise, adaptive overcurrent response across load conditions. |
| Package | 10-Lead MSOP - surface-mount footprint compatible with automated assembly and thermal management in space-constrained ECUs. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad (GND), θJA = 160°C/W, rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device ground reference | Common return for all internal circuits; exposed pad must be connected to PCB ground for thermal and electrical integrity. |
| VCC | Positive supply input | Accepts 4V–72V input; withstands –60V reverse; requires external Zener or RC filter for >80V transients. |
| OUT | Output voltage sense | Senses post-MOSFET voltage; internal clamp limits GATE–OUT to 17V; bypass with ≥22µF capacitor. |
| SNS | Current sense input | Monitors voltage drop across external sense resistor; regulates ΔVSNS to 50mV/62mV for overcurrent protection. |
| DRN | MOSFET drain-source sense | Tracks VDS via external RDRN; feeds multiplier to scale TMR current with MOSFET power dissipation. |
| GATE | N-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-drain-compatible; pulls device into 6µA shutdown when < 0.99V. |
| FLT | Fault status output | Open-drain logic low during fault; sinks up to 3mA; indicates active overvoltage or overcurrent condition. |
| SEL | Gate clamp select | GND = 31.5V clamp (12V systems); VCC = 50V clamp (24V/28V systems); unused for LTC4380-3/4. |
| TMR | Fault timer integrator | Capacitor-connected node; charges with fault-current proportional to MOSFET stress; triggers shutdown at 1.215V. |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA quiescent current | Enables direct connection to vehicle battery in always-on modules (e.g., telematics, ADAS sensors) without measurable parasitic drain. |
| Auto-retry fault recovery | Eliminates need for microcontroller intervention or power cycling after transient overvoltage/overcurrent events. |
| Reverse input protection to –60V | Removes requirement for external Schottky diode, reducing BOM count, forward voltage drop, and thermal loss. |
| Adjustable fault timer with MOSFET stress acceleration | Shortens protection response time under high VDS × ID, keeping external MOSFET within SOA during sustained faults. |
| Back-to-back MOSFET support | GATE pin drive capability allows reverse-polarity protection using two N-channel MOSFETs - no body-diode conduction path. |
Applications
| Automotive Load Dump Protection | Industrial Power Rail Protection |
|---|---|
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 12V bus surges. Use Value: Prevents damage to downstream 3.3V/5V regulators and processors without derating or oversized TVS devices. | Use Scenario: Securing programmable logic controllers (PLCs) and motor drives against 24V DC supply transients and reverse polarity wiring errors. IC Role / Device Role / Timing Role: High-side switch supervisor enforcing safe startup, overcurrent cutoff, and automatic retry after short-circuit faults. Use Value: Enables maintenance-free operation in unattended industrial environments with no manual reset required after fault clearance. |
| Battery-Powered Telematics Module | Avionic Power Conditioning |
Use Scenario: Maintaining GPS/cellular connectivity in fleet tracking devices powered directly from vehicle battery with zero standby current penalty. IC Role / Device Role / Timing Role: Always-on power controller providing undervoltage lockout (UVLO), reverse polarity immunity, and surge resilience. Use Value: Extends battery life in disconnected vehicles by drawing only 8µA during sleep mode while retaining full fault coverage. | Use Scenario: Protecting flight data recorders and cockpit displays from 28V aircraft bus transients and inadvertent reverse connection during maintenance. IC Role / Device Role / Timing Role: AEC-Q100 qualified surge stopper delivering latch-free recovery and –60V reverse tolerance per DO-160 Section 22 requirements. Use Value: Meets aviation safety mandates for autonomous fault recovery without pilot or ground crew action. |
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#PBF | Latchoff fault behavior (no auto-retry); identical pinout, specs, and temperature range. | Requires ON pin pulse or power cycle to recover after fault - unsuitable for unattended systems. | Select when deterministic manual reset is preferred or system firmware handles fault recovery. |
| LTC4380HMS-2#PBF | Same auto-retry behavior and functionality, but rated for –40°C to +125°C ambient. | Validated for under-hood automotive locations with higher thermal stress; larger thermal resistance (θJA = 160°C/W same, but wider temp range). | Select for engine compartment mounting or extended industrial temperature requirements. |
Compared with LTC4380IMS-1#PBF, LTC4380IMS-2#PBF enables autonomous recovery without host intervention; compared with LTC4380HMS-2#PBF, it trades extended temperature range for cost and availability advantages in cabin-mounted applications.
Availability
LTC4380IMS-2#PBF is available at Aetrix Electronics and suitable for automotive ECU power protection, industrial PLC front-end conditioning, and avionic 28V bus surge suppression requiring stable component supply across multi-year production cycles.
Supply support for LTC4380IMS-2#PBF 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 ultra-low-quiescent-current surge protection ICs designed specifically for automotive load dump, reverse polarity, and overcurrent resilience in battery-powered and always-on systems.
FAQ
What is the operating temperature range of the LTC4380IMS-2#PBF?
The LTC4380IMS-2#PBF is specified for –40°C to +85°C ambient operation, making it suitable for passenger cabin and non-engine-compartment automotive applications, as well as industrial control environments. This I-grade rating exceeds commercial-grade (0°C to 70°C) and aligns with AEC-Q100 Grade 3 requirements for automotive electronics reliability.
How does the LTC4380IMS-2#PBF differ from the LTC4380IMS-1#PBF?
The LTC4380IMS-2#PBF implements auto-retry fault behavior - after overvoltage or overcurrent shutdown, it autonomously cools down and restarts - whereas the LTC4380IMS-1#PBF latches off until ON pin is pulsed low or power is cycled. All other electrical specs, pinout, and package are identical between the two variants.
Can the LTC4380IMS-2#PBF protect against reverse battery connection?
Yes, the LTC4380IMS-2#PBF withstands –60V on the VCC pin with no damage, enabling direct reverse-polarity protection without external diodes. When used with back-to-back N-channel MOSFETs driven by the GATE pin, it eliminates forward voltage drop and heat generation associated with Schottky solutions.
What external components are required for basic operation of the LTC4380IMS-2#PBF?
Minimum external components for the LTC4380IMS-2#PBF include: an N-channel MOSFET (e.g., FDB33N25), current sense resistor (RSNS), DRN sense resistor (RDRN), timing capacitor (CTMR), 22µF OUT bypass capacitor, and 47nF GATE compensation network (33Ω + 47nF). SEL and ON pins require pull-up/down as needed for clamp selection and enable control.
Is the LTC4380IMS-2#PBF AEC-Q100 qualified?
Yes, the LTC4380IMS-2#PBF is AEC-Q100 qualified for automotive applications. It meets Grade 3 (–40°C to +85°C) stress testing requirements, including temperature cycling, humidity bias, and ESD, ensuring reliability in automotive power systems subject to harsh environmental and electrical conditions.
LTC4380IMS-2#PBF 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:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC4380IMS-2#PBF FAQ
1.How can I place an order for LTC4380IMS-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380IMS-2#PBF 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#PBF reliable?
The price and inventory of LTC4380IMS-2#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC4380IMS-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380IMS-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380IMS-2#PBF?
LTC4380IMS-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380IMS-2#PBF 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#PBF?
For technical support, including LTC4380IMS-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380IMS-2#PBF requirements.
6.How does Aetrix verify that LTC4380IMS-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4380IMS-2#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC4380IMS-2#PBF?
All LTC4380IMS-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380IMS-2#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC4380IMS-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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