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Analog Devices Inc. LTC4380HMS-1#WTRPBF
- Part No.:
- LTC4380HMS-1#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-1#WTRPBF.pdf
- Description:
- L Q C SURGE STOPPER
- Quantity:
- Payment:
- Shipping:
Inventory:4,190
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Product details
Overview
LTC4380HMS-1#WTRPBF 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 8 µA operating current, 31.5 V/50 V selectable gate clamp, –40°C to 125°C operating range, and AEC-Q100 qualification for automotive use - deployed in 12 V battery systems with 27 V output clamping.
For engineers reviewing the LTC4380HMS-1#WTRPBF datasheet, LTC4380HMS-1#WTRPBF pinout, LTC4380HMS-1#WTRPBF application, or LTC4380HMS-1#WTRPBF equivalent, key selection criteria include gate clamp voltage selection (SEL pin), fault behavior (latchoff vs. auto-retry), MOSFET stress acceleration via TMR-based multiplier, reverse input protection to –60 V, and compatibility with high-side N-MOSFET configurations in harsh automotive environments.
Technical Context
The LTC4380HMS-1#WTRPBF implements a voltage-controlled gate drive architecture with internal 20 µA charge pump regulating GATE to VOUT + 11.5 V, and dual-mode overvoltage clamping (31.5 V or 50 V referenced to GND via SEL pin). Its multiplier-based fault timer integrates DRN-sensed VDS and SNS-sensed ID to generate TMR current proportional to MOSFET power dissipation.
It supports latchoff-only fault response (–1 variant), eliminating automatic restart during sustained faults. The ON pin serves dual function: undervoltage detection (1.05 V threshold) and shutdown control, reducing quiescent current to 6 µA. Reverse input protection operates down to –60 V on VCC without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Current | 8 µA typical at 12 V - enables always-on battery-powered operation with minimal parasitic drain. |
| Gate Clamp Voltage | 31.5 V (SEL = GND) or 50 V (SEL = VCC) - sets output clamping at ~27 V or ~45 V for 12 V / 24 V systems. |
| Input Voltage Range | 4 V to 72 V - supports wide automotive battery range including cold-crank and load-dump transients. |
| Reverse Input Rating | –60 V on VCC - provides robust reverse-polarity protection without Schottky diode or external circuitry. |
| Fault Response | Latchoff (non-retry) - requires ON pin pulse or power cycle to recover after overvoltage/overcurrent fault. |
| Temperature Grade | H-grade (–40°C to +125°C) - qualified for under-hood automotive applications per AEC-Q100. |
| Package | 10-lead MSOP - thermally enhanced for high-power dissipation in compact layouts. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3 mm × 3 mm footprint, exposed pad). Thermal resistance θJA = 160°C/W. Exposed pad is GND and may be connected to PCB ground plane for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-MOSFET gate driver output | Regulated to VOUT + 11.5 V; clamped to 31.5 V or 50 V (SEL-dependent); includes 17 V internal clamp above OUT for short-circuit safety. |
| DRN | MOSFET drain-source sense input | Tracks OUT; current through RDRN ∝ VDS; feeds multiplier for MOSFET stress-aware fault timing. |
| SNS | Current sense amplifier input | Senses voltage across external sense resistor; regulates ΔVSNS to 50 mV (62 mV during severe short) to limit load current. |
| OUT | Output voltage sense reference | Connects to MOSFET source; internal clamp limits GATE–OUT to 17 V; bypass with ≥22 µF capacitor. |
| VCC | Main supply input | Operates from 4 V to 72 V; withstands –60 V reverse; protected by internal clamps; Zener clamp optional for >80 V spikes. |
| ON | Enable/shutdown & UVLO input | 1.05 V threshold; internal 1 MΩ pull-up; pulls part into 6 µA shutdown when <0.99 V; also resets latchoff fault. |
| FLT | Open-drain fault indicator | Pulls low when TMR reaches 1.215 V; sinks up to 3 mA; remains low until ON pulse or power cycle (latchoff mode). |
| SEL | Gate clamp voltage select | GND → 31.5 V clamp; VCC/OUT → 50 V clamp; unused for LTC4380-3/–4 variants. |
| TMR | Fault timer integration node | Capacitor-connected; current scales with MOSFET power dissipation; 1.215 V trip threshold triggers latchoff. |
| GND | Device ground reference | Reference for all analog circuitry; connects to exposed pad; must be low-impedance for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low 8 µA operating current | Enables direct connection to vehicle battery for always-on systems without excessive standby drain. |
| Selectable 31.5 V / 50 V gate clamp | Allows single BOM to support both 12 V (27 V clamp) and 24 V/28 V (45 V clamp) automotive platforms via SEL pin routing. |
| Latchoff-only fault response | Prevents uncontrolled cycling during persistent overvoltage (e.g., generator regulation failure), enhancing system safety. |
| Reverse input protection to –60 V | Eliminates need for external reverse-battery diode, reducing voltage drop, heat, and board space in high-current paths. |
| MOSFET stress acceleration via TMR multiplier | Reduces fault timeout exponentially with increasing VDS × ID, keeping MOSFET within SOA during worst-case transients. |
Applications
| Automotive Load Dump Protection | Reverse Battery Protection |
|---|---|
|
Use Scenario: Protecting infotainment ECUs and ADAS sensors from 120 V/100 ms load dump transients in 12 V vehicles. IC Role / Device Role / Timing Role: Surge stopper controlling high-side N-MOSFET; clamps output to 27 V using 31.5 V gate clamp (SEL = GND). Use Value: Prevents damage to downstream 3.3 V/5 V regulators and microcontrollers without derating or oversized TVS devices. |
Use Scenario: Safeguarding telematics modules during jump-start with reversed battery connections. IC Role / Device Role / Timing Role: High-side switch with –60 V VCC rating; blocks reverse current without forward voltage drop. Use Value: Eliminates 0.3–0.5 V Schottky diode loss and associated 1–2 W dissipation at 5 A, improving efficiency and thermal margin. |
| Industrial Power Sequencing | Avionic Hot-Swap Supply |
|
Use Scenario: Controlled power-up of rail-sensitive FPGA-based processing units in ruggedized industrial controllers. IC Role / Device Role / Timing Role: Inrush-limited high-side switch; GATE ramp rate set by IGATE(UP) = 20 µA and external CGATE. Use Value: Limits inrush to <1 A with 100 nF gate capacitance, avoiding bus collapse and contact arcing in relay-driven supplies. |
Use Scenario: Insertion of LRUs (Line Replaceable Units) into live 28 V aircraft power buses without causing bus disturbance. IC Role / Device Role / Timing Role: Fault-tolerant hot-swap controller; latchoff behavior prevents retry-induced bus oscillation during shorted LRU insertion. Use Value: Ensures clean, single-event isolation during fault - critical for MIL-STD-704F compliance and flight-critical redundancy. |
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#WTRPBF | Same functionality and specs, but in 3 mm × 3 mm DFN package (θJA = 43°C/W vs. 160°C/W) | Better thermal performance in high-power or space-constrained layouts; requires different PCB footprint and reflow profile. | Choose for higher ambient temperature or higher continuous current where thermal management is critical. |
| LTC4380HMS-2#WTRPBF | Identical package and grade, but auto-retry (not latchoff) fault behavior; same 31.5 V/50 V clamp options | Re-enables output after cool-down period without operator intervention - suitable for non-safety-critical recovery. | Choose when transient overvoltage is expected (e.g., intermittent alternator spikes) and autonomous recovery is acceptable. |
Compared with LTC4380HMS-1#WTRPBF, the DFN variant offers superior thermal dissipation for high-current designs, while the -2 version trades deterministic fault isolation for hands-off recovery - making the -1 optimal for safety-critical automotive subsystems requiring explicit reset confirmation.
Availability
LTC4380HMS-1#WTRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, reverse battery protection, and industrial hot-swap applications requiring stable component supply, AEC-Q100 qualification, and extended temperature operation.
Supply support for LTC4380HMS-1#WTRPBF 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 avionic power systems where reliability under extreme voltage transients is non-negotiable.
FAQ
What is the gate clamp voltage configuration for LTC4380HMS-1#WTRPBF?
The LTC4380HMS-1#WTRPBF uses the fixed internal gate clamp architecture: connecting the SEL pin to GND configures a 31.5 V clamp (for ~27 V output in 12 V systems), while tying SEL to VCC selects a 50 V clamp (~45 V output for 24 V/28 V systems). This is confirmed in the "LTC4380 Options" table and electrical characteristics section of the datasheet.
Does LTC4380HMS-1#WTRPBF support auto-retry after a fault?
No. LTC4380HMS-1#WTRPBF is the "–1" variant and implements latchoff-only fault behavior. Once the TMR pin reaches 1.215 V and the MOSFET turns off, the device remains latched off until the ON pin is pulled low for ≥100 µs or power is cycled. This is explicitly defined in Table 1 and the OPERATION section of the datasheet.
What is the maximum reverse input voltage the LTC4380HMS-1#WTRPBF can withstand?
The LTC4380HMS-1#WTRPBF supports –60 V on the VCC pin with no damage, enabling direct reverse-battery protection without external diodes. This rating applies across the full –40°C to +125°C temperature range and is specified in the Absolute Maximum Ratings table.
How does the TMR pin function in LTC4380HMS-1#WTRPBF?
In LTC4380HMS-1#WTRPBF, the TMR pin integrates current proportional to MOSFET power dissipation (VDS × ID). When TMR voltage reaches 1.215 V, the device latches off. Unlike auto-retry versions, there is no cool-down charging/discharging cycle - the TMR capacitor holds its charge until reset via ON pin or power cycle.
Is LTC4380HMS-1#WTRPBF AEC-Q100 qualified?
Yes. LTC4380HMS-1#WTRPBF carries the "#W" suffix denoting automotive-grade qualification. It is rated for –40°C to +125°C operation and meets AEC-Q100 requirements for automotive applications, as stated in the ORDER INFORMATION section and Automotive Products footnote.
LTC4380HMS-1#WTRPBF 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:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC4380HMS-1#WTRPBF FAQ
1.How can I place an order for LTC4380HMS-1#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-1#WTRPBF 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#WTRPBF reliable?
The price and inventory of LTC4380HMS-1#WTRPBF 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#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-1#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-1#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-1#WTRPBF?
LTC4380HMS-1#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-1#WTRPBF 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#WTRPBF?
For technical support, including LTC4380HMS-1#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-1#WTRPBF requirements.
6.How does Aetrix verify that LTC4380HMS-1#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-1#WTRPBF 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#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-1#WTRPBF?
All LTC4380HMS-1#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-1#WTRPBF, 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#WTRPBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-1#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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