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Analog Devices Inc. LTC4380CMS-2#TRPBF
- Part No.:
- LTC4380CMS-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380CMS-2#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,497
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Product details
Overview
LTC4380CMS-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, input overvoltage (up to 250Vpk), and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, 8µA operating current, and auto-retry fault behavior. Used in 12V/24V automotive power rails with output clamping at ~27V or ~45V.
For engineers reviewing the LTC4380CMS-2#TRPBF datasheet, LTC4380CMS-2#TRPBF pinout, LTC4380CMS-2#TRPBF application, or LTC4380CMS-2#TRPBF equivalent, key selection criteria include gate clamp voltage selectability, MOSFET stress-accelerated fault timing, reverse input protection to –60V, latchoff vs. auto-retry behavior, and AEC-Q100 qualification for automotive systems.
Technical Context
The LTC4380CMS-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 MOSFET safe-operating-area (SOA) protection. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V during normal operation.
As the "-2" variant, it provides fixed internal gate clamp voltages (31.5V/50V selectable via SEL) and auto-retry fault recovery with cool-down timing controlled by CTMR. It supports reverse input protection to –60V and operates across 4V–72V input range with 8µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - enables direct use in 12V/24V/28V automotive and industrial rails without external regulators. |
| Quiescent Current | 8µA typical - allows always-on battery-powered applications with minimal standby drain. |
| Gate Clamp Options | 31.5V (SEL = GND) or 50V (SEL = VCC) - sets output clamp at ~27V or ~45V respectively for 12V/24V system compatibility. |
| Fault Behavior | Auto-retry with cool-down - automatically recovers after fault clears, reducing need for manual reset or system intervention. |
| Reverse Input Protection | –60V - withstands reverse battery connection without damage, eliminating need for external series diode. |
| Package | 10-Lead MSOP - surface-mount package with exposed thermal pad; compatible with standard reflow and automated assembly. |
| AEC-Q100 Grade | Industrial temperature range (–40°C to 85°C) - qualified for under-hood automotive environments. |
Pinout & Package
10-Lead Plastic MSOP package (3mm × 3mm footprint, 0.5mm pitch), with exposed thermal pad connected to GND. Pin 1 marked by dot; top view matches datasheet MS PACKAGE diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device ground reference | Primary return path for all internal circuits and external sense resistors; exposed pad must be connected to PCB ground plane for thermal and electrical integrity. |
| VCC | Positive supply input | Accepts 4V–72V input; tolerates –60V reverse; powers internal circuitry and charge pump; requires local 4.7µF bypass capacitor. |
| OUT | Output voltage sense | Connects to load-side of sense resistor; senses regulated output; internal clamp limits GATE–OUT to 17V; requires ≥22µF local bypass. |
| SNS | Current sense input | Connects to source-side of sense resistor; monitors ΔVSNS for overcurrent; threshold is 50mV (62mV in severe short); max ±5V differential. |
| DRN | MOSFET drain-source sense | Tracks OUT; develops current proportional to VDS; used with RDRN to feed multiplier for MOSFET stress timing. |
| GATE | N-MOSFET gate driver | Drives external N-channel MOSFET gate; regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) or VCC + 13.5V. |
| ON | Enable/shutdown control | Logic input with 1.05V threshold; open = enabled via internal 1MΩ pull-up; pulled low = shutdown (6µA IQ); supports UVLO and remote ON/OFF. |
| SEL | Gate clamp voltage select | Ground = 31.5V clamp; tied to VCC/OUT = 50V clamp; determines output clamp level for 12V vs. 24V system use. |
| TMR | Fault timer integrator | Connects to CTMR capacitor; charges at rate proportional to MOSFET power dissipation; trips at 1.215V; controls auto-retry cool-down interval. |
| FLT | Fault status output | Open-drain output; pulls low during fault (overvoltage/overcurrent); sinks up to 3mA; indicates active protection state. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | Enables autonomous system recovery after transient overvoltage or overload without host intervention or power cycle. |
| MOSFET stress-accelerated timing | TMR current scales with VDS × ID, shortening fault timeout under high-power-dissipation conditions to keep MOSFET within SOA. |
| Reverse input protection to –60V | Eliminates need for external Schottky diode, reducing forward drop, heat, and board space in battery-connected inputs. |
| Selectable 31.5V/50V gate clamp | Allows single BOM part to support both 12V (27V clamp) and 24V/28V (45V clamp) automotive architectures via SEL pin routing. |
| 8µA operating quiescent current | Extends battery life in always-on telematics, ADAS sensors, and infotainment modules requiring low standby power. |
Applications
| Automotive Load Dump Protection | Hot-Swap Power Insertion |
|---|---|
Use Scenario: Protecting ECUs and infotainment units from 12V vehicle battery line transients up to 250Vpk during alternator load dump. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET; clamps output to 27V using 31.5V gate clamp (SEL = GND); initiates fault timer only during sustained overvoltage. Use Value: Prevents downstream IC damage while maintaining uninterrupted operation during sub-100ms transients; eliminates need for TVS diodes on load side. |
Use Scenario: Safely inserting powered modules into live backplanes or chassis power rails in industrial PLCs or telecom equipment. IC Role / Device Role / Timing Role: High-side switch with controlled turn-on ramp; limits inrush via GATE slew rate (20µA charge pump); detects overcurrent before connector arcing occurs. Use Value: Enables zero-downtime maintenance; avoids bus brownouts and contact welding; supports IEEE 1602.1-compliant hot-swap sequencing. |
| Battery-Powered Always-On Systems | Reverse Battery Protection |
Use Scenario: Maintaining real-time clock, GPS tracking, and CAN wake-up functionality in parked vehicles with limited battery capacity. IC Role / Device Role / Timing Role: Low-IQ (8µA) enable controller; ON pin doubles as undervoltage lockout (UVLO) at 1.05V; shuts down at battery < 9V to prevent deep discharge. Use Value: Extends usable battery life by >3× versus discrete PMOS solutions; integrates UVLO without external comparator or divider. |
Use Scenario: Preventing damage when vehicle battery is installed backward during service or replacement. IC Role / Device Role / Timing Role: Reverse polarity protector; blocks –60V input without series diode; GATE remains off until correct polarity applied. Use Value: Removes 0.3–0.7V forward drop and associated heat; avoids derating of downstream converters; simplifies mechanical design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380IMS-2#TRPBF | Same functionality and pinout; rated for –40°C to 85°C (I-grade) vs. 0°C to 70°C (C-grade) of LTC4380CMS-2#TRPBF. | Required for extended-temperature automotive modules (e.g., engine bay, ADAS cameras). | Select when ambient operating temperature exceeds 70°C; otherwise LTC4380CMS-2#TRPBF is cost-optimized for cabin/infotainment use. |
| LTC4380HMS-2#TRPBF | Same functionality and pinout; rated for –40°C to 125°C (H-grade); higher thermal resistance (θJA = 160°C/W) than C/I grades. | Supports under-hood applications with peak junction temperatures up to 125°C. | Choose only if full AEC-Q100 Grade 0 (–40°C to +125°C) compliance is mandated; verify PCB thermal design for θJA. |
Compared with LTC4380IMS-2#TRPBF and LTC4380HMS-2#TRPBF, the LTC4380CMS-2#TRPBF offers identical surge protection architecture and auto-retry behavior but targets cost-sensitive, moderate-temperature automotive subsystems-making it optimal for dashboard displays, body controllers, and telematics where 0°C to 70°C ambient suffices.
Availability
LTC4380CMS-2#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, hot-swap insertion, and reverse battery protection requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC4380CMS-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 industrial, automotive, communications, and healthcare markets.
The LTC4380 product line delivers robust, low-quiescent-current surge protection for automotive and industrial power rails, designed specifically to replace discrete MOSFET+controller solutions with integrated fault timing, reverse protection, and selectable clamp voltages.
FAQ
What is the gate clamp voltage configuration for LTC4380CMS-2#TRPBF?
The LTC4380CMS-2#TRPBF supports two fixed internal gate clamp voltages: 31.5V when the SEL pin is grounded (for 12V systems, yielding ~27V output clamp), and 50V when SEL is tied to VCC or OUT (for 24V/28V systems, yielding ~45V output clamp). This dual-voltage capability is built into the LTC4380CMS-2#TRPBF silicon and requires no external components to configure.
Does LTC4380CMS-2#TRPBF support auto-retry after overvoltage or overcurrent faults?
Yes, LTC4380CMS-2#TRPBF implements auto-retry fault behavior. After a fault triggers TMR to 1.215V and turns off the external MOSFET, it enters a cool-down phase where TMR discharges and recharges 15 times between 1.215V and 3.4V. Once TMR falls below 100mV, the LTC4380CMS-2#TRPBF automatically restarts - no power cycle or ON pin toggle required.
What is the maximum reverse input voltage the LTC4380CMS-2#TRPBF can withstand?
The LTC4380CMS-2#TRPBF is rated for reverse input voltage down to –60V on the VCC pin, as specified in Absolute Maximum Ratings. This allows direct connection to automotive battery terminals without external reverse-polarity protection diodes, reducing conduction loss and thermal burden in always-on systems.
How does the fault timer in LTC4380CMS-2#TRPBF respond to MOSFET stress?
The LTC4380CMS-2#TRPBF uses an internal multiplier to generate TMR pin current proportional to both VDS (measured at DRN) and ID (measured via ΔVSNS). Higher MOSFET power dissipation increases TMR charging rate, shortening fault timeout - ensuring the MOSFET stays within its safe operating area during severe overvoltage or overload events.
Is LTC4380CMS-2#TRPBF qualified for automotive applications?
Yes, LTC4380CMS-2#TRPBF is AEC-Q100 qualified for automotive applications. It is specified for the industrial temperature range (–40°C to 85°C) and manufactured under controlled processes meeting automotive reliability standards. The "-2" suffix denotes auto-retry behavior, and the "CMS" package is the 10-lead MSOP variant approved for automotive use.
LTC4380CMS-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
LTC4380CMS-2#TRPBF FAQ
1.How can I place an order for LTC4380CMS-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380CMS-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 LTC4380CMS-2#TRPBF reliable?
The price and inventory of LTC4380CMS-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 LTC4380CMS-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380CMS-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380CMS-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380CMS-2#TRPBF?
LTC4380CMS-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380CMS-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 LTC4380CMS-2#TRPBF?
For technical support, including LTC4380CMS-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380CMS-2#TRPBF requirements.
6.How does Aetrix verify that LTC4380CMS-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380CMS-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 LTC4380CMS-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380CMS-2#TRPBF?
All LTC4380CMS-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380CMS-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 LTC4380CMS-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380CMS-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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