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Analog Devices Inc. LTC4380HMS-1#PBF
- Part No.:
- LTC4380HMS-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-1#PBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,092
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Product details
Overview
LTC4380HMS-1#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 input, overvoltage (up to 72V input), 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 MSOP-10 package. Used in automotive battery protection circuits where latchoff fault behavior and AEC-Q100 qualification are required.
For engineers reviewing the LTC4380HMS-1#PBF datasheet, LTC4380HMS-1#PBF pinout, LTC4380HMS-1#PBF application, or LTC4380HMS-1#PBF equivalent, key selection criteria include gate clamp voltage configuration (SEL = GND → 31.5V), latchoff vs. auto-retry behavior, MOSFET stress acceleration via TMR-based multiplier, reverse input tolerance to –60V, and H-grade temperature rating for under-hood deployment.
Technical Context
The LTC4380HMS-1#PBF implements a voltage-controlled gate driver with internal 31.5V/50V gate-to-GND clamp (SEL-selectable) and VCC+13.5V compliance limit. Its multiplier-based fault timer integrates DRN-sensed VDS and SNS-sensed ID to generate TMR current proportional to MOSFET power dissipation - enabling shorter turn-off times under higher stress.
It uses an internal 20µA charge pump regulated to VOUT + 11.5V for gate drive, supports reverse input protection to –60V, and latches off upon fault (no auto-retry). The ON pin serves dual role: undervoltage detection (1.05V threshold) and shutdown control, reducing quiescent current to 6µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports 12V/24V/28V automotive systems and industrial rails up to 72V. |
| Quiescent Current | 8µA typical at 25°C - enables always-on battery-powered applications without excessive drain. |
| Gate Clamp Voltage | 31.5V (SEL = GND) or 50V (SEL = VCC) - sets output clamping at ~27V or ~45V respectively for 12V/24V systems. |
| Fault Response | Latchoff behavior - requires ON pin pulse <100µs or power cycle to reset after overvoltage/overcurrent fault. |
| Reverse Input Rating | –60V - allows direct connection to reversed battery terminals without damage. |
| Current Limit Threshold | 50mV (OUT > 3V) rising to 62mV (OUT < 1.5V) - provides tighter current limiting during severe shorts. |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive environments per H-grade specification. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 0.5mm pitch, exposed pad optional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRN | VDS sense input | Tracks OUT; current through RDRN scales with MOSFET drain-source voltage for fault timing acceleration. |
| GATE | N-MOSFET gate driver | 20µA charge pump regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) or VCC + 13.5V. |
| SNS | Current sense input | Monitors voltage drop across external sense resistor; regulates GATE to hold ΔVSNS = 50mV/62mV. |
| OUT | Output voltage sense | Reference point for SNS, GATE regulation, and internal clamps; bypass with ≥22µF capacitor. |
| VCC | Supply input | 4V–80V operating range; withstands –60V reverse; protected by Zener or RC filter above 80V. |
| ON | Enable/UV/shutdown | 1.05V threshold; open = enabled via 1MΩ internal pull-up; pulled low = 6µA shutdown mode. |
| FLT | Open-drain fault flag | Pulls low when TMR reaches 1.215V; indicates latched-off state; sinks up to 3mA. |
| SEL | Gate clamp select | GND = 31.5V clamp; VCC/OUT = 50V clamp - determines output clamping level for 12V/24V systems. |
| TMR | Fault timer integrator | Capacitor-connected node; current scales with MOSFET power dissipation; 1.215V trip threshold. |
| GND | Device ground | Reference for all analog circuitry; exposed pad may be connected to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA operating current | Enables permanent connection to vehicle battery without significant parasitic drain. |
| Internal 31.5V/50V gate clamp | Eliminates need for external Zener diode in 12V/24V systems; simplifies BOM and layout. |
| Latchoff fault response | Prevents uncontrolled cycling during sustained faults - critical for safety-critical automotive subsystems. |
| Reverse input protection to –60V | Withstands accidental battery reversal without external diodes or protection circuitry. |
| MOSFET stress acceleration | TMR current multiplies VDS × ID, shortening fault timeout under high-power-dissipation conditions. |
Applications
| Automotive Load Dump Protection | High-Side Battery Switch |
|---|---|
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 as high-side switch; clamps output to 27V using 31.5V gate clamp (SEL = GND). Use Value: Prevents damage to downstream 28V-rated components while maintaining latchoff behavior for diagnostic visibility. | Use Scenario: Enabling/disabling power to telematics modules during vehicle sleep/wake cycles. IC Role / Device Role / Timing Role: High-side switch controller with ultra-low 8µA quiescent current and ON-pin undervoltage lockout. Use Value: Eliminates Schottky diode voltage drop and heat; extends battery life in always-on telematics applications. |
| Reverse Battery Protection | Industrial 24V Power Rail Protection |
Use Scenario: Safeguarding engine control units against incorrect battery installation in service bays. IC Role / Device Role / Timing Role: Reverse input tolerant controller driving back-to-back N-MOSFETs for bidirectional blocking. Use Value: Replaces lossy series diode solutions; achieves <10mΩ on-resistance path with zero forward voltage drop. | Use Scenario: Securing programmable logic controllers (PLCs) from 24V rail surges caused by inductive load switching. IC Role / Device Role / Timing Role: Overvoltage protector using 50V gate clamp (SEL = VCC) to limit output to ~45V during 60V transients. Use Value: Maintains operation through short transients while latching off during sustained overvoltage - preventing thermal runaway. |
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#PBF | Same electrical specs and latchoff behavior, but in 3mm × 3mm DFN-10 package with θJA = 43°C/W. | Better thermal performance in space-constrained layouts; no exposed pad soldering requirement. | Select for improved power dissipation in compact automotive modules where board area is limited. |
| LTC4380HMS-2#PBF | Identical package and H-grade rating, but auto-retry (not latchoff) fault behavior and same 31.5V/50V clamp. | Recovers automatically after transient faults; unsuitable where fault persistence must be logged. | Select only if system firmware requires autonomous recovery without host intervention after brief overvoltage events. |
Compared with LTC4380HMS-1#PBF, the DFN variant offers superior thermal resistance for high-current designs, while the -2 version trades diagnostic latchoff for automatic restart - making the -1 optimal for safety-critical automotive subsystems requiring explicit fault acknowledgment.
Availability
LTC4380HMS-1#PBF is available at Aetrix Electronics and suitable for automotive load dump protection, high-side battery switching, and reverse input protection requiring stable component supply across extended temperature ranges.
Supply support for LTC4380HMS-1#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 automotive, industrial, communications, and healthcare markets.
The LTC4380 product line delivers robust, low-quiescent-current surge protection ICs designed specifically for automotive and harsh-environment power rail conditioning - emphasizing latchoff reliability, reverse polarity resilience, and MOSFET stress-aware fault timing.
FAQ
What is the gate clamp voltage configuration for LTC4380HMS-1#PBF?
The LTC4380HMS-1#PBF features a fixed internal gate clamp to ground: 31.5V when the SEL pin is tied to GND, or 50V when SEL is tied to VCC or OUT. This directly determines output clamping levels (~27V or ~45V) and is confirmed in the device's "Table 1" and Electrical Characteristics table under VGATE parameter. No external components are needed to set this clamp.
Does LTC4380HMS-1#PBF support auto-retry after a fault?
No, LTC4380HMS-1#PBF implements latchoff fault behavior. Once the TMR pin reaches 1.215V due to overvoltage or overcurrent, the MOSFET turns off and remains off until the ON pin is pulsed low for >100µs or power is cycled. This is inherent to the "–1" suffix variant and distinguishes it from the auto-retry –2 version.
What is the maximum reverse input voltage the LTC4380HMS-1#PBF can withstand?
The LTC4380HMS-1#PBF is rated for –60V reverse input voltage on the VCC pin, as specified in Absolute Maximum Ratings. This allows direct connection to reversed battery terminals in automotive service scenarios without damage - a key differentiator from standard high-side switches.
How does the TMR pin function in LTC4380HMS-1#PBF?
In LTC4380HMS-1#PBF, the TMR pin integrates a current proportional to MOSFET power dissipation (VDS × ID). When TMR voltage reaches 1.215V, the device latches off. Unlike auto-retry versions, there is no cool-down phase - the TMR capacitor holds its charge until reset via ON pin or power cycle.
Is LTC4380HMS-1#PBF AEC-Q100 qualified?
Yes, LTC4380HMS-1#PBF is AEC-Q100 qualified for automotive applications. Its H-grade temperature range (–40°C to +125°C), latchoff fault behavior, reverse input tolerance, and specified operating voltage range (4V–72V) meet requirements for under-hood deployment per the official Analog Devices automotive product documentation.
LTC4380HMS-1#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
LTC4380HMS-1#PBF FAQ
1.How can I place an order for LTC4380HMS-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-1#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 LTC4380HMS-1#PBF reliable?
The price and inventory of LTC4380HMS-1#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-1#PBF?
LTC4380HMS-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-1#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 LTC4380HMS-1#PBF?
For technical support, including LTC4380HMS-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-1#PBF requirements.
6.How does Aetrix verify that LTC4380HMS-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-1#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 LTC4380HMS-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-1#PBF?
All LTC4380HMS-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-1#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 LTC4380HMS-1#PBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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