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Analog Devices Inc. LTC4380HDD-2#TRPBF
- Part No.:
- LTC4380HDD-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380HDD-2#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,590
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Product details
Overview
LTC4380HDD-2#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, overvoltage transients up to 250Vpk, and overcurrent faults. It features fixed 31.5V/50V gate clamp selection (SEL-pin configurable), 8µA operating current, and auto-retry fault behavior - enabling robust 12V/24V battery-powered systems requiring continuous operation under harsh electrical conditions.
For engineers reviewing the LTC4380HDD-2#TRPBF datasheet, LTC4380HDD-2#TRPBF pinout, LTC4380HDD-2#TRPBF application, or LTC4380HDD-2#TRPBF equivalent, key selection criteria include its H-grade (–40°C to +125°C) operation, DFN-10 (3mm × 3mm) package, adjustable fault timing via TMR capacitor, reverse input protection to –60V, and latchoff vs. auto-retry behavior distinction among LTC4380 variants.
Technical Context
The LTC4380HDD-2#TRPBF implements a multiplier-based fault timer where TMR pin current scales with both MOSFET VDS (sensed at DRN) and ID (via ΔVSNS), dynamically shortening turn-off time under high-power-dissipation faults to enforce SOA compliance. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V during normal conduction, while clamping GATE to 31.5V (SEL = GND) or 50V (SEL = VCC) during overvoltage events.
It integrates undervoltage detection on the ON pin (1.05V threshold, 45mV hysteresis), provides open-drain FLT output signaling fault status, supports reverse input protection to –60V, and delivers auto-retry behavior with low-duty-cycle restart (≤3.5% under 28V overvoltage) - distinguishing it from latchoff variants like LTC4380HDD-1#TRPBF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | H-grade: –40°C to +125°C - qualified for under-hood automotive environments and industrial control cabinets. |
| Quiescent Current | 8 µA typical - enables always-on battery backup systems without significant drain over years. |
| Input Voltage Range | 4 V to 72 V - supports 12V, 24V, and 28V automotive/industrial rails with margin for transients. |
| Gate Clamp Options | 31.5 V (SEL = GND) or 50 V (SEL = VCC) - sets output clamp at ~27 V or ~45 V respectively, matching 12V/24V system safety limits. |
| Fault Behavior | Auto-retry (LTC4380-2 variant) - automatically recovers after cool-down period; no manual reset required. |
| Reverse Input Protection | –60 V - withstands reverse battery connection without damage or latch-up. |
| Current Limit Threshold | 50 mV (rising), 62 mV (severe short, VOUT < 1.5 V) - defines precise overcurrent trip point via external sense resistor. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (pin 11 = GND). RoHS-compliant, lead-free finish, optimized for thermal performance in space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device ground reference | Common return for all internal circuits; exposed pad must be connected to PCB ground plane for thermal and EMI performance. |
| VCC | Positive supply input | Accepts 4V–72V input; withstands –60V reverse bias; requires external Zener or RC filter for >80V transients. |
| OUT | Output voltage sense | Connects to load-side of sense resistor; internal clamp limits GATE–OUT to 17V; bypass with ≥22µF ceramic. |
| SNS | Current sense input | Connects to source-side of sense resistor; senses ΔVSNS = ILOAD × RSNS; limited to ±5V differential. |
| DRN | MOSFET drain-source sense | Tracks VDS via external RDRN; generates proportional current into TMR to accelerate fault timing under high stress. |
| GATE | N-MOSFET gate drive | Drives external MOSFET gate; regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) or VCC + 13.5V. |
| ON | Enable/UV detect input | 1.05V threshold with 45mV hysteresis; open-circuit enables device; pulled low disables with 6µA shutdown current. |
| SEL | Gate clamp select | GND = 31.5V clamp (12V systems); VCC/OUT = 50V clamp (24V/28V systems); unused for LTC4380-3/4. |
| TMR | Fault timer integrator | Capacitor-connected node; charges with MOSFET power-dissipation-proportional current; 1.215V threshold triggers fault. |
| FLT | Open-drain fault indicator | Pulls low during fault; sinks up to 3mA; high-impedance otherwise; used for system-level fault logging or shutdown coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | Enables autonomous system recovery after overvoltage/overcurrent events without host intervention or power cycle. |
| Adjustable MOSFET stress timing | TMR current scales with VDS × ID, reducing fault timeout under high dissipation to keep MOSFET within SOA. |
| Reverse input protection to –60V | Eliminates need for external series diode or back-to-back MOSFETs in bidirectional battery interfaces. |
| Low 8µA operating current | Extends battery life in always-on telematics, ADAS sensors, and infotainment standby modes. |
| Fixed dual-voltage gate clamp | 31.5V/50V selection via SEL pin simplifies design for 12V or 24V/28V platforms without external components. |
Applications
| Automotive Load Dump Protection | Industrial Power Supply Input Protection |
|---|---|
Use Scenario: Protecting ECUs, infotainment units, and ADAS cameras from 12V vehicle battery load dump transients (up to 250Vpk, 400ms). 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 downstream component failure without sacrificing efficiency - MOSFET RDS(on) dominates conduction loss, not IC dropout. | Use Scenario: Securing programmable logic controllers (PLCs) and motor drives against 24V DC supply surges caused by inductive switching or grid instability. IC Role / Device Role / Timing Role: High-voltage transient limiter with 50V gate clamp (SEL = VCC) limiting output to ~45V; auto-retry ensures uptime during intermittent faults. Use Value: Maintains operational continuity in factory automation while eliminating need for bulky TVS arrays or sacrificial fuses. |
| Battery-Powered Telematics Module | Hot-Swap Backplane Interface |
Use Scenario: Enabling always-on GPS tracking and cellular connectivity in fleet management devices powered by 12V lead-acid batteries. IC Role / Device Role / Timing Role: Low-IQ (8µA) enable controller with undervoltage lockout (ON pin) and reverse polarity protection (–60V rating). Use Value: Extends battery service life beyond 5 years in maintenance-free deployments without compromising surge resilience. | Use Scenario: Safely inserting/replacing line cards in telecom or data center backplanes with live 12V/24V power buses. IC Role / Device Role / Timing Role: Inrush current limiter and fault isolator; uses TMR capacitor to set controlled soft-start and fast fault shutdown (<4µs propagation). Use Value: Prevents bus voltage sag and arcing during insertion while ensuring rapid isolation during card short-circuit events. |
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 | Latchoff fault behavior (no auto-retry); identical H-grade temp range, pinout, and clamp voltages. | Requires manual reset or power cycle after fault - suitable for safety-critical systems where unattended recovery is prohibited. | Select when deterministic fault containment is prioritized over autonomy. |
| LTC4380HMS-2#TRPBF | Same functionality and specs, but in MSOP-10 package (5.0mm × 4.4mm) instead of DFN-10 (3mm × 3mm). | Offers easier hand-soldering and thermal relief via exposed pad access; lower power density than DFN. | Select when board assembly constraints favor MSOP or thermal testing requires accessible pad. |
Compared with LTC4380HDD-1#TRPBF, the LTC4380HDD-2#TRPBF enables self-healing operation after transients, reducing system downtime; versus LTC4380HMS-2#TRPBF, it delivers 3× smaller footprint and superior thermal resistance (θJA = 43°C/W vs. 160°C/W), critical for compact automotive modules.
Availability
LTC4380HDD-2#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial power supply input hardening, and battery-powered telematics modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4380HDD-2#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 robust, low-IQ surge protection ICs designed specifically for automotive and industrial systems facing load dump, reverse battery, and sustained overvoltage threats - emphasizing reliability, thermal efficiency, and seamless integration with discrete N-MOSFETs.
FAQ
What is the maximum input voltage the LTC4380HDD-2#TRPBF can withstand without damage?
The LTC4380HDD-2#TRPBF has an absolute maximum VCC rating of 80V, but its functional operating range is specified up to 72V. For inputs exceeding 72V - such as automotive load dump spikes - external protection (e.g., Zener clamp or RC filter on VCC) is required. The device also tolerates –60V reverse input on VCC, enabling robust reverse-polarity handling without additional components.
How does the LTC4380HDD-2#TRPBF differ from the LTC4380HDD-1#TRPBF?
The LTC4380HDD-2#TRPBF implements auto-retry fault behavior: after overvoltage or overcurrent shutdown, it automatically cools down and restarts. In contrast, the LTC4380HDD-1#TRPBF latches off permanently until power is cycled or the ON pin is pulsed low for >100µs. Both share identical H-grade temperature range, pinout, gate clamp options, and quiescent current.
Can the LTC4380HDD-2#TRPBF drive back-to-back MOSFETs for reverse input protection?
Yes - the LTC4380HDD-2#TRPBF's GATE pin can drive back-to-back N-channel MOSFETs configured as an ideal diode, eliminating Schottky forward voltage drop and associated power loss. This configuration leverages the IC's ability to regulate gate voltage relative to OUT, enabling efficient reverse polarity protection down to –60V without external diodes or P-MOSFETs.
What is the purpose of the DRN pin on the LTC4380HDD-2#TRPBF?
The DRN pin on the LTC4380HDD-2#TRPBF senses the external MOSFET's drain-to-source voltage (VDS) via an external resistor (RDRN). Its current is multiplied internally with ΔVSNS to generate a TMR pin current proportional to MOSFET power dissipation - accelerating fault timing under high-stress conditions and enforcing safe operating area (SOA) compliance.
Is the LTC4380HDD-2#TRPBF AEC-Q100 qualified?
Yes - the LTC4380HDD-2#TRPBF is AEC-Q100 qualified for automotive applications. Its H-grade temperature range (–40°C to +125°C), robust ESD tolerance, and validated reliability testing per AEC-Q100 Rev H ensure suitability for under-hood and chassis-mounted electronic control units requiring automotive-grade assurance.
LTC4380HDD-2#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-2#TRPBF FAQ
1.How can I place an order for LTC4380HDD-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HDD-2#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-2#TRPBF reliable?
The price and inventory of LTC4380HDD-2#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-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HDD-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HDD-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HDD-2#TRPBF?
LTC4380HDD-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HDD-2#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-2#TRPBF?
For technical support, including LTC4380HDD-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HDD-2#TRPBF requirements.
6.How does Aetrix verify that LTC4380HDD-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HDD-2#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-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HDD-2#TRPBF?
All LTC4380HDD-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HDD-2#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-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380HDD-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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