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Analog Devices Inc. LTC4380HMS-1#TRPBF
- Part No.:
- LTC4380HMS-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-1#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,903
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Product details
Overview
LTC4380HMS-1#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 AEC-Q100 qualification for automotive use.
For engineers reviewing the LTC4380HMS-1#TRPBF datasheet, LTC4380HMS-1#TRPBF pinout, LTC4380HMS-1#TRPBF application, or LTC4380HMS-1#TRPBF equivalent, this page delivers verified functional role, validated pin-level circuit behavior, confirmed thermal and fault-timing specifications, and real-world automotive/industrial surge protection use cases - all traceable to Analog Devices' Rev. C datasheet and official parametric data.
Technical Context
The LTC4380HMS-1#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 MOSFET stress–adaptive turn-off timing. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V during normal operation and clamps GATE to 31.5V (SEL = GND) or 50V (SEL = VCC) during overvoltage.
It supports latchoff fault behavior (non-retry), uses an ON pin comparator for undervoltage detection (1.05V threshold) and shutdown control, and integrates reverse input protection to –60V without external diodes by driving back-to-back MOSFETs. The device operates from 4V to 72V input and tolerates VCC down to –60V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Current | 8 µA typical at 25°C - enables always-on battery-powered systems without significant drain |
| Input Voltage Range | 4 V to 72 V - supports 12 V, 24 V, and 28 V automotive/industrial rails with margin |
| Gate Clamp Voltage | 31.5 V (SEL = GND) - limits output to ~27 V in 12 V systems during load dump |
| Current Limit Threshold | 50 mV (SNS–OUT) - sets precise overcurrent trip point scalable via sense resistor |
| Fault Timer Threshold | 1.215 V on TMR pin - triggers MOSFET turn-off when integrated stress current reaches safe SOA limit |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive environments per AEC-Q100 H-grade |
| Reverse Input Rating | –60 V - eliminates need for series Schottky diode in reverse-battery protection designs |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 0.5mm pitch). Exposed pad is GND and may be connected to PCB ground plane for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary return path for internal circuits and exposed pad; must be low-impedance for stable fault timing |
| VCC | Positive Supply Input | Accepts 4V–72V input; withstands –60V reverse; powers internal regulators and logic |
| ON | Enable/Shutdown Control | 1.05V threshold comparator; open-drain compatible; pulls part into 6µA shutdown when < 1V |
| SEL | Gate Clamp Selection | Ground = 31.5V clamp; connect to VCC = 50V clamp; defines output clamping level for 12V/24V systems |
| OUT | Output Voltage Sense | Senses post-MOSFET voltage; internal clamp limits GATE–OUT to 17V; requires ≥22µF local bypass |
| SNS | Current Sense Input | Monitors voltage drop across external sense resistor; controls GATE to hold ΔVSNS at 50mV/62mV |
| DRN | MOSFET Drain–Source Monitor | Current proportional to VDS; feeds multiplier to accelerate TMR charging during high-stress faults |
| GATE | N-Channel MOSFET Gate Driver | 20µA charge pump regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent); requires 47nF + 33Ω RC compensation |
| TMR | Fault Timer Integration Node | Capacitor-connected node; charges with MOSFET stress–scaled current; trips at 1.215V; enters latchoff after fault |
| FLT | Open-Drain Fault Indicator | Pulls low during fault; sinks up to 3mA; signals MOSFET off-state to system controller or status LED |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA quiescent current | Enables direct connection to vehicle battery for always-on ECU modules without excessive parasitic drain |
| Adjustable fault timing via TMR capacitor | Allows tuning of overvoltage/overcurrent response time to match specific MOSFET SOA and system transient profiles |
| Back-to-back MOSFET support | Eliminates forward voltage drop and heat dissipation of Schottky diodes in reverse-input protection topologies |
| Internal multiplier-based stress sensing | Reduces MOSFET SOA derating by dynamically shortening fault timeout as power dissipation increases |
| AEC-Q100 H-grade qualification | Validated for extended temperature operation (–40°C to +125°C) and automotive reliability requirements |
Applications
| Automotive Load Dump Protection | Industrial Power Rail Surge Suppression |
|---|---|
|
Use Scenario: Protecting infotainment head units and ADAS ECUs from ISO 16750-2 load dump transients up to 120V for 400ms. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET; clamps output to 27V using 31.5V gate clamp (SEL = GND) and latches off upon sustained overvoltage. Use Value: Prevents damage to 3.3V/5V downstream regulators and microcontrollers without requiring oversized TVS diodes or complex active clamping. |
Use Scenario: Securing programmable logic controllers (PLCs) against 24V rail surges caused by inductive load switching in factory automation. IC Role / Device Role / Timing Role: High-side switch supervisor; monitors VDS and ID to detect and terminate overcurrent before MOSFET thermal runaway. Use Value: Enables robust hot-swap capability with precise current limiting and automatic fault isolation-no manual reset required after transient clearance. |
| Battery-Powered Telematics Module | Reverse Battery Protection for Vehicle Sensors |
|
Use Scenario: Maintaining GPS/GSM connectivity in fleet tracking devices powered directly from vehicle battery with zero-maintenance standby. IC Role / Device Role / Timing Role: Always-on supply supervisor; draws only 8µA in active mode and 6µA in ON-pin shutdown state. Use Value: Extends battery life beyond 5 years in sleep mode while retaining fast wake-up (<25ms turn-on delay) and full surge resilience. |
Use Scenario: Safeguarding CAN bus sensors and LIN nodes against accidental reverse battery connection during service or assembly. IC Role / Device Role / Timing Role: Reverse-input protector; blocks –60V without diode voltage drop or conduction loss. Use Value: Eliminates 0.3–0.5V forward drop and associated heat generation, preserving efficiency and enabling compact sensor housing design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380HDD-1#TRPBF | Same functionality and specs, but in 3mm × 3mm DFN package instead of MSOP; θJA = 43°C/W vs 160°C/W | Better thermal performance in space-constrained PCB layouts; requires different land pattern and reflow profile | Select for higher power density or improved thermal management; verify layout compatibility with DFN footprint |
| LTC4380IMS-1#WTRPBF | Identical MSOP package and pinout; automotive-grade with enhanced reliability reporting and PPAP support | Required for Tier-1 automotive production programs needing full AEC-Q100 documentation and traceability | Choose when automotive OEM compliance (e.g., Ford WERS, GM 1927) or formal qualification evidence is mandatory |
Compared with LTC4380HMS-1#TRPBF, the DFN variant offers superior thermal resistance for higher ambient or continuous load conditions, while the #W suffix version adds certified automotive process controls and reporting - neither is pin-compatible with non-MSOP packages nor functionally identical to auto-retry variants (e.g., -2 or -4).
Availability
LTC4380HMS-1#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial PLC power rails, and battery-powered telematics modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC4380HMS-1#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, automotive, and communications markets.
The LTC4380 product line is designed specifically for high-reliability DC power protection in harsh environments - delivering low-quiescent surge suppression with adaptive MOSFET stress management for automotive and industrial applications.
FAQ
What is the primary function of the LTC4380HMS-1#TRPBF in a power system?
The LTC4380HMS-1#TRPBF functions as a low-quiescent-current surge stopper that controls an external N-channel MOSFET to protect downstream loads from overvoltage (e.g., automotive load dump), overcurrent, and reverse-input conditions. It does not regulate voltage but limits output by clamping the MOSFET gate - the LTC4380HMS-1#TRPBF achieves this with fixed 31.5V/50V gate clamp selection and latchoff fault behavior.
How does the SEL pin affect the operation of the LTC4380HMS-1#TRPBF?
The SEL pin on the LTC4380HMS-1#TRPBF selects between two internal gate clamp voltages: grounding SEL sets a 31.5V clamp (for ~27V output in 12V systems), while connecting SEL to VCC selects a 50V clamp (for ~45V output in 24V/28V systems). This choice directly determines the maximum safe output voltage during overvoltage events - the LTC4380HMS-1#TRPBF uses this pin exclusively for clamp selection and has no other configuration role.
Does the LTC4380HMS-1#TRPBF support automatic retry after a fault?
No, the LTC4380HMS-1#TRPBF implements latchoff fault behavior - once the TMR pin reaches 1.215V and triggers shutdown, the MOSFET remains off until power is cycled or the ON pin is pulled low for at least 100µs. This differs from auto-retry versions like LTC4380HMS-2#TRPBF. The LTC4380HMS-1#TRPBF is explicitly designated as a "–1" variant in Analog Devices' ordering matrix, confirming its non-retry operation.
What is the minimum recommended capacitance on the OUT pin for the LTC4380HMS-1#TRPBF?
Analog Devices specifies a minimum of 22µF ceramic or tantalum capacitance directly at the OUT pin of the LTC4380HMS-1#TRPBF, placed as close as possible to the pin. This capacitance stabilizes the output voltage sense node, prevents oscillation in the current-limit amplifier loop, and ensures reliable startup and fault response - undersized or distant OUT bypassing may cause erratic current limiting or false fault triggering in the LTC4380HMS-1#TRPBF.
Can the LTC4380HMS-1#TRPBF be used with a P-channel MOSFET?
No, the LTC4380HMS-1#TRPBF is designed exclusively for N-channel MOSFETs configured as high-side switches. Its GATE driver is a charge pump that sources current to pull the gate above the source (OUT), which is incompatible with P-channel topology. Attempting to drive a P-MOSFET would prevent proper enhancement and likely cause failure - the LTC4380HMS-1#TRPBF datasheet, block diagram, and application circuits all assume N-channel operation only.
LTC4380HMS-1#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-1#TRPBF FAQ
1.How can I place an order for LTC4380HMS-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-1#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-1#TRPBF reliable?
The price and inventory of LTC4380HMS-1#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-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-1#TRPBF?
LTC4380HMS-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-1#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-1#TRPBF?
For technical support, including LTC4380HMS-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-1#TRPBF requirements.
6.How does Aetrix verify that LTC4380HMS-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-1#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-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-1#TRPBF?
All LTC4380HMS-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-1#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-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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