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Analog Devices Inc. LTC4380HDD-4#TRPBF
- Part No.:
- LTC4380HDD-4#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380HDD-4#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,036
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Product details
Overview
LTC4380HDD-4#TRPBF from Analog Devices is a high-temperature, auto-retry surge stopper IC that controls an external N-channel MOSFET to protect downstream loads from automotive load dump (up to 250V), overvoltage, and overcurrent events. It features 8µA operating quiescent current, 4V–72V input range, adjustable gate clamp via external Zener, and fault timer with MOSFET stress acceleration. Used in 12V/24V automotive power rails requiring robust transient protection.
For engineers reviewing the LTC4380HDD-4#TRPBF datasheet, LTC4380HDD-4#TRPBF pinout, LTC4380HDD-4#TRPBF application, or LTC4380HDD-4#TRPBF equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade thermal performance (–40°C to 125°C), and real-world surge protection design context - all grounded in Analog Devices' Rev. C datasheet and official package documentation.
Technical Context
The LTC4380HDD-4#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 dynamic SOA protection. Its GATE driver delivers regulated 11.5V above OUT and supports back-to-back MOSFET configurations for reverse input protection down to –60V.
This variant (–4 suffix) provides auto-retry behavior after fault timeout and uses externally adjustable gate clamping - no internal 31.5V/50V clamp - relying instead on VCC Zener clamping to set output limit. It operates across 4V–72V input and maintains 6µA shutdown current when ON pin is pulled low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to +125°C - qualified for under-hood automotive environments without derating. |
| Quiescent Current | 8 µA typical at 12V - enables always-on battery systems with multi-year standby life. |
| Input Voltage Range | 4V to 72V - supports 12V, 24V, and 48V industrial/automotive rails with margin. |
| Fault Timer Behavior | Auto-retry (–4 variant) - cools down then restarts after fault; no manual reset required. |
| GATE Clamp Method | Externally adjustable via VCC Zener - enables precise output clamping from 18V to 86V. |
| Reverse Input Protection | –60V continuous - allows direct connection to reversed battery terminals without damage. |
| Overcurrent Threshold | 50 mV (SNS–OUT) rising to 62 mV during severe short - sets accurate, temperature-stable current limit. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (pin 11 = GND). RoHS-compliant, lead-free, tape-and-reel (#TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device ground reference and thermal pad connection | Exposed pad must be connected to PCB ground plane for thermal dissipation and noise immunity. |
| VCC | Main supply input | Accepts 4V–72V; withstands –60V reverse; requires Zener clamp for >80V transients. |
| OUT | Output voltage sense node | Connects to MOSFET source; bypassed with ≥22µF capacitor for stability and ripple rejection. |
| SNS | Current sense input | Monitors voltage drop across external sense resistor; sets 50mV/62mV current limit threshold. |
| DRN | MOSFET drain-source sense | Tracks VDS via external RDRN; feeds multiplier for MOSFET power-dissipation-based timing. |
| GATE | N-MOSFET gate drive output | Regulated 11.5V above OUT; clamped to VCC+13.5V; requires 47nF/33Ω RC compensation. |
| ON | Enable/shutdown control | 1.05V threshold; pulls part into 6µA shutdown when ≤0.99V; supports undervoltage detection. |
| SEL | Gate clamp select (inactive in –4) | Internally tied to GND per datasheet - unused; no internal clamp enabled for LTC4380-4 variants. |
| TMR | Fault timer integrator | Charges with MOSFET-stress-proportional current; trips at 1.215V; sets retry cool-down period. |
| FLT | Open-drain fault indicator | Pulls low during overvoltage/overcurrent fault; sinks up to 3mA; signals system controller. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | Eliminates manual reset requirement after load dump or short-circuit; reduces system downtime. |
| Adjustable output clamping | Enables precise output voltage limiting (e.g., 27V, 45V, or custom values) using external VCC Zener. |
| Back-to-back MOSFET support | Allows reverse polarity protection without Schottky diode losses - saves power and board space. |
| MOSFET stress-accelerated timing | TMR current scales with VDS × ID, shortening fault timeout during high-power faults to preserve SOA. |
| Ultra-low 6µA shutdown current | Extends battery life in always-on telematics, ADAS sensors, and infotainment wake-up circuits. |
Applications
| Automotive Load Dump Protection | Industrial 24V Power Rail Protection |
|---|---|
|
Use Scenario: Protecting ECUs, ADAS cameras, and infotainment units from ISO 7637-2 Pulse 5a/b (250V/100ms) load dump transients in 12V vehicle systems. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET; regulates GATE to clamp output at ~27V during surge. Use Value: Prevents downstream IC damage without sacrificing efficiency - replaces bulky TVS + linear regulator solutions. |
Use Scenario: Securing programmable logic controllers (PLCs) and motor drives against 24V rail surges caused by inductive switching or lightning-induced coupling. IC Role / Device Role / Timing Role: High-voltage transient limiter with adjustable clamp; auto-retry ensures uninterrupted operation after transient clearance. Use Value: Maintains uptime in factory automation by recovering autonomously - no operator intervention or firmware reset needed. |
| Battery-Powered Telematics | Avionics Power Conditioning |
|
Use Scenario: Enabling always-on GPS/GSM modules in fleet tracking devices powered by 12V lead-acid batteries with intermittent engine-off operation. IC Role / Device Role / Timing Role: Low-quiescent-current (8µA) enable switch and overvoltage protector; ON pin doubles as UVLO monitor. Use Value: Achieves >5-year battery life while providing full surge resilience - critical for remote, unattended deployments. |
Use Scenario: Safeguarding flight control interface boards in commercial aircraft where 28V DC supplies face MIL-STD-704F transients and reverse polarity risk. IC Role / Device Role / Timing Role: Reverse-input-tolerant (–60V) surge stopper with latch-free auto-retry; meets AEC-Q100 Grade H reliability. Use Value: Eliminates single-point failure mode - survives reverse battery connection and recovers from EMI-induced faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380HDD-2#TRPBF | Fixed internal 31.5V/50V gate clamp; same –40°C to +125°C rating and auto-retry behavior. | Requires SEL pin configuration for clamp selection; no external Zener needed but less flexible output limiting. | Choose when fixed 27V/45V clamping suffices and board space for Zener is constrained. |
| LTC4381HDE-4#TRPBF | Same –4 auto-retry function, but adds integrated 100V N-MOSFET and 2.5A current capability; DFN-12 package. | Reduces BOM count and layout complexity; limited to lower current apps vs discrete MOSFET scalability of LTC4380. | Choose for compact, medium-current designs (<2.5A) where integration outweighs flexibility. |
Compared with LTC4380HDD-2#TRPBF, the LTC4380HDD-4#TRPBF trades internal clamp simplicity for precise, wide-range output voltage control via Zener; compared with LTC4381HDE-4#TRPBF, it retains full discrete MOSFET scalability for high-current or high-voltage (>100V) applications.
Availability
LTC4380HDD-4#TRPBF is available at Aetrix Electronics and suitable for automotive ECU protection, industrial 24V PLC power rails, and avionics 28V conditioning requiring stable component supply, AEC-Q100 Grade H qualification, and long-term production continuity.
Supply support for LTC4380HDD-4#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 precision instrumentation, industrial automation, and automotive markets.
The LTC4380 product line delivers ultra-low-quiescent-current surge protection ICs designed specifically for harsh automotive and industrial environments where load dump, reverse polarity, and sustained overcurrent must be managed without compromising efficiency or reliability.
FAQ
What is the maximum input voltage the LTC4380HDD-4#TRPBF can handle?
The LTC4380HDD-4#TRPBF supports a continuous input voltage range of 4V to 72V on the VCC pin. During transients such as automotive load dump, the VCC pin must be clamped externally (e.g., with a 68V Zener) to stay within its absolute maximum rating of 80V. The device itself withstands –60V reverse input continuously, making it suitable for battery-reversal scenarios.
How does the LTC4380HDD-4#TRPBF differ from the LTC4380HDD-2#TRPBF?
The LTC4380HDD-4#TRPBF uses externally adjustable gate clamping (no internal clamp), while the LTC4380HDD-2#TRPBF has selectable internal 31.5V/50V clamps set by the SEL pin. Both share the same –40°C to +125°C rating and auto-retry fault behavior, but only the LTC4380HDD-4#TRPBF requires a VCC Zener to define output clamping voltage.
What is the purpose of the DRN pin on the LTC4380HDD-4#TRPBF?
The DRN pin on the LTC4380HDD-4#TRPBF senses the MOSFET's drain-to-source voltage (VDS) via an external resistor. Its current, combined with SNS–OUT voltage (proportional to ID), forms a multiplier signal that drives the TMR pin - enabling fault timing proportional to MOSFET power dissipation and improving safe operating area (SOA) protection.
Can the LTC4380HDD-4#TRPBF be used without an external MOSFET?
No - the LTC4380HDD-4#TRPBF is a controller IC and requires an external N-channel MOSFET to function. It provides gate drive, fault sensing, and timing control but contains no power switch. The MOSFET selection (e.g., FDB33N25) must match the application's voltage, current, and SOA requirements.
Does the LTC4380HDD-4#TRPBF support reverse input protection?
Yes - the LTC4380HDD-4#TRPBF supports continuous reverse input down to –60V on the VCC pin and enables reverse polarity protection via back-to-back N-MOSFET configuration driven by the GATE pin. This eliminates the forward voltage drop and heat generation of Schottky diode solutions.
LTC4380HDD-4#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-WFDFN Exposed Pad
- 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-DFN (3x3)
LTC4380HDD-4#TRPBF FAQ
1.How can I place an order for LTC4380HDD-4#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HDD-4#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 LTC4380HDD-4#TRPBF reliable?
The price and inventory of LTC4380HDD-4#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4380HDD-4#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HDD-4#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HDD-4#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HDD-4#TRPBF?
LTC4380HDD-4#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HDD-4#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 LTC4380HDD-4#TRPBF?
For technical support, including LTC4380HDD-4#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HDD-4#TRPBF requirements.
6.How does Aetrix verify that LTC4380HDD-4#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HDD-4#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 LTC4380HDD-4#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HDD-4#TRPBF?
All LTC4380HDD-4#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HDD-4#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 LTC4380HDD-4#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380HDD-4#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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