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Analog Devices Inc. LTC4380IMS-3#TRPBF
- Part No.:
- LTC4380IMS-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380IMS-3#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,898
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Product details
Overview
LTC4380IMS-3#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 polarity, and overcurrent events. It features 8µA operating current, 4V–72V input range, adjustable gate clamp (via external Zener), latchoff fault behavior, and −40°C to +85°C industrial temperature grade in MSOP package - deployed in battery-powered telematics and rail-side power distribution.
For engineers reviewing the LTC4380IMS-3#TRPBF datasheet, LTC4380IMS-3#TRPBF pinout, LTC4380IMS-3#TRPBF application, or LTC4380IMS-3#TRPBF equivalent, key selection criteria include its adjustable overvoltage clamping architecture, MOSFET stress-accelerated fault timer, reverse input protection to −60V, and compatibility with high-side N-MOSFET configurations requiring precise SOA management.
Technical Context
The LTC4380IMS-3#TRPBF implements a multiplier-based fault timer where TMR pin current scales with both VDS (sensed at DRN) and ID (via ΔVSNS), enabling dynamic MOSFET safe-operating-area enforcement. Its gate drive regulates to VOUT + 11.5V and lacks internal gate-to-GND clamp - relying instead on external VCC clamping for output voltage limiting.
It uses an accurate 1.05V ON-pin comparator for undervoltage detection and shutdown control, reducing quiescent current to 6µA. Fault response is latchoff (non-auto-retry), requiring ON-pin pulse or power cycle for recovery - distinct from -2/-4 variants with cool-down/retry behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports 12V/24V/28V automotive and industrial rails without external regulators. |
| Quiescent Current | 8µA typical - enables always-on operation in battery-backed systems with multi-year runtime. |
| Fault Timer Threshold | TMR pin trips at 1.215V - sets precise MOSFET turn-off timing based on integrated power dissipation. |
| Current Limit Sense | 50mV (rising), 62mV (severe short) - defines load current limit via external sense resistor RSNS. |
| Reverse Input Protection | −60V withstand - allows direct connection to reversed battery terminals without damage. |
| Gate Drive Compliance | VGATE = VOUT + 11.5V - ensures full enhancement of N-MOSFETs with low RDS(on) across wide VIN range. |
| Temperature Grade | −40°C to +85°C - qualified for industrial and extended-temperature automotive ECUs. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 0.5mm pitch). Exposed pad optional for thermal relief; pin 1 marked by dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Common return for all internal circuits; must be low-impedance connection to system ground plane. |
| VCC | Positive Supply Input | Accepts 4V–72V input; withstands −60V reverse; requires external Zener clamp for >72V transients. |
| OUT | Output Voltage Sense | Connects to load-side of sense resistor; internal clamp limits GATE–OUT to 17V for MOSFET safety. |
| SNS | Current Sense Input | Connects to source-side of sense resistor; senses ΔVSNS to regulate load current to 50/62mV threshold. |
| DRN | MOSFET Drain-Sense Input | Tracks VDS via external RDRN; feeds multiplier to accelerate TMR charging during high-power faults. |
| GATE | N-MOSFET Gate Driver | Drives external N-channel MOSFET gate; regulated to VOUT + 11.5V; no internal GND clamp (adjustable only). |
| ON | Enable/UV Detection Input | Turns device on above 1.05V; pulls down to 6µA shutdown; tolerates −60V to +80V with no damage. |
| SEL | Clamp Select (NC for -3) | No-connect for LTC4380IMS-3#TRPBF; internal gate clamp disabled - output clamping set solely by VCC Zener. |
| FLT | Open-Drain Fault Output | Pulls low during overvoltage/overcurrent fault; sinks up to 3mA; requires external pull-up for logic-level signaling. |
| TMR | Fault Timer Integration Node | Capacitor-connected node; charges with MOSFET-stress-proportional current; triggers latchoff at 1.215V. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Overvoltage Clamp | Enabled via external Zener on VCC - supports custom output clamping from 18V to 86V without changing IC variant. |
| Latchoff Fault Response | Permanently disables GATE until ON pin pulsed low ≥100µs or power cycled - prevents uncontrolled retries during persistent faults. |
| MOSFET Stress-Accelerated Timing | TMR current scales with VDS × ID - reduces fault timeout under high-power conditions to enforce MOSFET SOA compliance. |
| Reverse Input Protection | Withstands −60V on VCC with no external components - eliminates need for series diode or dedicated reverse-polarity IC. |
| Ultra-Low Quiescent Current | 8µA operating / 6µA shutdown - extends battery life in always-on monitoring nodes and remote sensors. |
Applications
| Automotive Load Dump Protection | Rail-Side Power Distribution |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS cameras from 12V vehicle battery load dump surges up to 250V peak. IC Role / Device Role / Timing Role: Surge stopper controlling high-side N-MOSFET; clamps output to 27V using external 68V Zener on VCC. Use Value: Eliminates need for TVS diodes rated >250V while maintaining <8µA standby draw - critical for ISO 16750-2 compliance. |
Use Scenario: Powering trackside IoT sensors from 24V DC rail subject to intermittent brownouts and polarity reversal. IC Role / Device Role / Timing Role: High-side switch with reverse polarity and UV lockout; ON pin monitors rail health before enabling load. Use Value: −60V reverse tolerance and 1.05V UV threshold prevent damage during rail maintenance swaps and ensure clean startup. |
| Battery-Powered Telematics | Industrial Control Module |
Use Scenario: Enabling GPS/4G modules in fleet-tracking devices powered by lithium-thionyl chloride batteries (3.6V–3.9V nominal). IC Role / Device Role / Timing Role: Low-IQ enable switch with programmable current limit; SNS/OUT sense enables precise 500mA load regulation. Use Value: 8µA quiescent current extends 10-year battery life; latchoff behavior prevents repeated fault cycling during antenna short events. |
Use Scenario: Protecting PLC I/O modules from field-wiring faults including accidental 48V DC misconnection and cable ESD. IC Role / Device Role / Timing Role: Adjustable overvoltage protector; TMR capacitor sets 100ms fault hold time before latching off. Use Value: External VCC Zener allows clamping at 45V for 48V systems - avoids redesign when upgrading from 24V to 48V infrastructure. |
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 | Fixed 31.5V/50V internal gate clamp; SEL pin functional; same latchoff behavior. | Requires SEL pin routing; less flexible clamping than -3; no external Zener needed for standard 12V/24V rails. | Select when fixed 27V/45V output clamping suffices and board space precludes Zener placement. |
| LTC4380IMS-4#TRPBF | Same adjustable clamp architecture but auto-retry (cool-down) fault behavior instead of latchoff. | Re-enables after fault clears; unsuitable for safety-critical latched-shutdown requirements. | Choose for non-safety systems needing automatic recovery after transient overloads - e.g., test equipment power sequencing. |
Compared with LTC4380IMS-1#TRPBF and LTC4380IMS-4#TRPBF, the LTC4380IMS-3#TRPBF uniquely combines externally adjustable clamping with deterministic latchoff - offering design flexibility for custom voltage thresholds while guaranteeing fault isolation until explicit reset.
Availability
LTC4380IMS-3#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, battery-powered telematics, and industrial control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4380IMS-3#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-IQ surge protection ICs designed specifically for high-reliability power path management in harsh environments - emphasizing MOSFET SOA control, reverse polarity resilience, and automotive-grade qualification.
FAQ
What is the gate clamp architecture of the LTC4380IMS-3#TRPBF?
The LTC4380IMS-3#TRPBF has no internal gate-to-GND clamp. Its output voltage is controlled exclusively by external clamping of the VCC pin - typically using a Zener diode - which sets the maximum GATE voltage to VZ + 13.5V. This enables fully adjustable clamping from 18V to 86V, unlike fixed-clamp variants like LTC4380IMS-1#TRPBF.
Does the LTC4380IMS-3#TRPBF support auto-retry after a fault?
No. The LTC4380IMS-3#TRPBF implements latchoff behavior: once the TMR pin reaches 1.215V and triggers a fault, the GATE pin remains off until the ON pin is pulled low for at least 100µs or power is cycled. This differs from LTC4380IMS-4#TRPBF, which automatically retries after a cool-down period.
How is reverse input protection implemented in the LTC4380IMS-3#TRPBF?
The LTC4380IMS-3#TRPBF withstands −60V on the VCC pin with no external components due to internal protection circuitry. This allows direct connection to reversed battery terminals in automotive applications without Schottky diodes or dedicated reverse-polarity ICs - reducing BOM count and forward voltage drop.
What is the role of the DRN pin in the LTC4380IMS-3#TRPBF?
The DRN pin senses the drain-source voltage (VDS) of the external N-MOSFET via a resistor divider. Its current, combined with ΔVSNS, forms a multiplier output that drives the TMR pin - accelerating fault timing proportionally to MOSFET power dissipation and ensuring SOA compliance during sustained overloads.
Can the LTC4380IMS-3#TRPBF operate from a 3.3V supply?
No. The LTC4380IMS-3#TRPBF requires a minimum 4V on VCC to operate. Below this, internal regulation fails and the device remains disabled. For sub-4V systems, a boost converter or alternative low-voltage surge protector is required - the LTC4380IMS-3#TRPBF is optimized for 12V+ industrial and automotive rails.
LTC4380IMS-3#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-3#TRPBF FAQ
1.How can I place an order for LTC4380IMS-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380IMS-3#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-3#TRPBF reliable?
The price and inventory of LTC4380IMS-3#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-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380IMS-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380IMS-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380IMS-3#TRPBF?
LTC4380IMS-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380IMS-3#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-3#TRPBF?
For technical support, including LTC4380IMS-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380IMS-3#TRPBF requirements.
6.How does Aetrix verify that LTC4380IMS-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380IMS-3#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-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380IMS-3#TRPBF?
All LTC4380IMS-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380IMS-3#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-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380IMS-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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