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Analog Devices Inc. LTC4380IDD-1#TRPBF
- Part No.:
- LTC4380IDD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380IDD-1#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,905
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Product details
Overview
LTC4380IDD-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 polarity, and overcurrent events. It features 8µA operating current, 31.5V/50V selectable gate clamp, 4V–72V input range, and latchoff fault behavior. It is used in 12V/24V automotive power rails where robust transient suppression and battery-backed operation are required.
For engineers reviewing the LTC4380IDD-1#TRPBF datasheet, LTC4380IDD-1#TRPBF pinout, LTC4380IDD-1#TRPBF application, or LTC4380IDD-1#TRPBF equivalent, key selection criteria include gate clamp voltage selection (SEL pin), fault response mode (latchoff vs. retry), MOSFET stress acceleration via TMR-based multiplier, reverse input protection to –60V, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC4380IDD-1#TRPBF implements a multiplier-based fault timer that generates TMR current proportional to both VDS (via DRN pin) and ID (via SNS–OUT differential), enabling dynamic MOSFET safe-operating-area (SOA) enforcement. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V, with fixed 31.5V or 50V clamping to GND depending on SEL pin state - confirming it as the -1 variant.
It operates across –40°C to +85°C ambient, supports reverse input down to –60V, and integrates undervoltage detection (ON pin threshold = 1.05V) with 45mV hysteresis. Fault detection triggers at TMR = 1.215V; for LTC4380-1, this causes latched shutdown requiring ON pin pulse or power cycle - no auto-retry behavior.
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 12V/24V/28V automotive and industrial rails with headroom for transients. |
| Gate Clamp Voltage | 31.5 V (SEL = GND) or 50 V (SEL = VCC); sets output clamp ~27 V or ~45 V respectively for load dump protection. |
| Fault Response | Latchoff mode; requires ON pin pulse ≥100 µs or power cycle to recover - prevents uncontrolled restart during sustained faults. |
| Reverse Input Rating | –60 V; allows direct connection to reversed battery without external diode or protection circuitry. |
| Current Limit Threshold | 50 mV (rising), 62 mV (severe short, OUT < 1.5 V); defines precise, temperature-stable current limit via external sense resistor. |
| Package | 10-lead 3 mm × 3 mm DFN; exposed pad (Pin 11) tied to GND for thermal performance and EMI reduction. |
Pinout & Package
Package: 10-Lead (3 mm × 3 mm) Plastic DFN with exposed thermal pad (Pin 11 = GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 7) | Device ground reference | Primary return path for all internal circuits; must be low-impedance connection to system ground plane. |
| VCC (Pin 6) | Positive supply input | Accepts 4 V–72 V input; withstands –60 V reverse; powers internal regulators and logic. |
| OUT (Pin 5) | Output voltage sense | Senses regulated output node; bypassed with ≥22 µF capacitor to stabilize gate control loop. |
| SNS (Pin 4) | Current sense input | Connects to high-side of sense resistor; monitors load current via ΔVSNS = 50 mV threshold. |
| DRN (Pin 3) | MOSFET drain-source sense | Tracks VDS via external RDRN; feeds multiplier for MOSFET power-dissipation–based fault timing. |
| GATE (Pin 2) | N-MOSFET gate driver | Drives external N-channel MOSFET gate; regulated to VOUT + 11.5 V; clamped to 31.5 V/50 V (SEL-dependent). |
| ON (Pin 9) | Enable/UV detection input | Turns device on above 1.05 V; pulls low to enter 6 µA shutdown; also serves as undervoltage comparator. |
| SEL (Pin 8) | Gate clamp select | GND = 31.5 V clamp; VCC/OUT = 50 V clamp - selects output clamp level for 12V or 24V/28V systems. |
| FLT (Pin 10) | Fault indicator output | Open-drain output pulled low during fault; sinks up to 3 mA; signals latched-off condition. |
| TMR (Pin 1) | Fault timer capacitor node | Integrates current proportional to MOSFET stress; charges to 1.215 V to trigger latchoff; no auto-retry. |
Key Features
| Feature | Design Value |
|---|---|
| Low quiescent current | 8 µA operating current enables direct connection to vehicle battery for always-on monitoring without parasitic drain. |
| Selectable gate clamp | Hardware-selectable 31.5 V or 50 V gate-to-GND clamp via SEL pin - eliminates need for external Zener in standard 12V/24V designs. |
| Latchoff fault response | Hard shutdown on overvoltage/overcurrent; prevents uncontrolled cycling during persistent faults - critical for safety-critical automotive subsystems. |
| Reverse input protection | Withstands –60 V on VCC without damage or external components - simplifies front-end design in dual-battery or jump-start scenarios. |
| MOSFET stress acceleration | TMR current scales with VDS × ID, shortening fault timeout under high-power dissipation - enforces SOA compliance across temperature and load conditions. |
Applications
| Automotive Load Dump Protection | Always-On Telematics Power Rail |
|---|---|
|
Use Scenario: Protecting infotainment, ADAS, or telematics ECUs from ISO 7637-2 Pulse 5a/b load dump transients up to 120 V peak. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET; clamps output to ≤27 V using 31.5 V gate clamp (SEL = GND) and latches off if fault persists. Use Value: Eliminates need for TVS diodes rated >100 V, reduces board space and BOM cost while maintaining AEC-Q100 compliance. |
Use Scenario: Providing stable 12 V rail to GPS, cellular modem, and CAN transceivers in parked vehicle mode with <10 µA total system draw. IC Role / Device Role / Timing Role: Low-IQ pass controller with undervoltage lockout (ON pin) and reverse polarity immunity - ensures reliable wake-up and brownout recovery. Use Value: Enables >1-year battery life in disconnected vehicle state without sacrificing surge resilience or reverse protection. |
| Industrial 24V DC Power Distribution | Hot-Swap Controller for Field-Replaceable Modules |
|
Use Scenario: Securing PLC I/O modules and sensors against 24 V rail transients caused by inductive switching or cable ESD. IC Role / Device Role / Timing Role: Gate-controlled high-side switch with adjustable current limit (via RSNS) and 50 V gate clamp (SEL = VCC) for 24 V/28 V systems. Use Value: Replaces discrete MOSFET + Zener + comparator solutions with single IC, reducing layout complexity and improving fault repeatability. |
Use Scenario: Enabling safe insertion/removal of powered modules into backplane slots without disrupting upstream 12 V/24 V supply. IC Role / Device Role / Timing Role: Inrush-limited hot-swap controller using GATE ramp rate control and programmable fault timer (CTMR) to prevent bus collapse during plug-in. Use Value: Limits inrush to <1 A via controlled gate slew rate and provides latchoff on short-circuit - avoids cascading failures in modular systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380IDD-2#TRPBF | Same package, temperature grade, and pinout; differs only in fault behavior - auto-retry instead of latchoff. | Preferred where automatic recovery after transient faults is acceptable (e.g., non-safety-critical peripherals). | Select LTC4380IDD-1#TRPBF when hard shutdown and manual reset are required for functional safety compliance. |
| TPS26631PWPR | Integrated 60 V eFuse with 1.2 A current limit; no external MOSFET needed; 25 µA quiescent current; no reverse input rating. | Used where compactness and simplicity outweigh need for ultra-low IQ or –60 V reverse tolerance. | Choose LTC4380IDD-1#TRPBF when reverse polarity immunity, sub-10 µA IQ, or custom MOSFET selection (e.g., 100 V+ devices) is mandatory. |
Compared with LTC4380IDD-2#TRPBF, the LTC4380IDD-1#TRPBF provides deterministic latched shutdown for fail-safe operation; compared with TPS26631PWPR, it delivers superior reverse voltage handling and lower quiescent current but requires external MOSFET design and layout effort.
Availability
LTC4380IDD-1#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, always-on telematics power rails, and industrial 24V DC distribution requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC4380IDD-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 automotive, industrial, communications, and healthcare markets.
The LTC4380 series is part of Analog Devices' robust power protection portfolio, designed specifically for automotive-grade surge suppression with ultra-low quiescent current and integrated MOSFET control logic.
FAQ
What is the gate clamp voltage configuration for LTC4380IDD-1#TRPBF?
The LTC4380IDD-1#TRPBF implements fixed internal gate-to-GND clamping at either 31.5 V (when SEL is grounded) or 50 V (when SEL is tied to VCC or OUT). This distinguishes it from the -3/-4 variants, which lack internal clamps and require external Zener regulation. The clamp directly determines output voltage limiting during overvoltage events such as load dump.
Does LTC4380IDD-1#TRPBF support auto-retry after a fault?
No. The LTC4380IDD-1#TRPBF uses latchoff fault behavior: once the TMR pin reaches 1.215 V, the GATE turns off and remains off until the ON pin is pulsed low for ≥100 µs or power is cycled. This is confirmed by Table 1 in the datasheet, which assigns "Latchoff" to the -1 suffix. Auto-retry is exclusive to -2 and -4 variants.
What is the maximum reverse input voltage the LTC4380IDD-1#TRPBF can withstand?
The LTC4380IDD-1#TRPBF is rated for –60 V on the VCC pin with no damage or functional degradation. This is specified in Absolute Maximum Ratings and validated across the full –40°C to +85°C operating temperature range. No external reverse-polarity protection diode is required, simplifying front-end design in automotive and dual-battery applications.
How does the TMR pin function in LTC4380IDD-1#TRPBF?
In the LTC4380IDD-1#TRPBF, the TMR pin integrates current proportional to MOSFET power dissipation (VDS × ID). When TMR voltage reaches 1.215 V, the device latches off. Unlike -2/-4 versions, there is no cool-down phase or auto-restart - the capacitor must be discharged externally (e.g., via ON pin pulse) to resume operation. CTMR value sets the fault timeout duration.
Is LTC4380IDD-1#TRPBF qualified for automotive applications?
Yes. The "I" grade in LTC4380IDD-1#TRPBF denotes –40°C to +85°C operation, and the device is explicitly AEC-Q100 qualified for automotive applications per the datasheet's FEATURES section. It meets stress test requirements for temperature cycling, humidity, and ESD, making it suitable for engine bay, body control, and infotainment systems.
LTC4380IDD-1#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)
LTC4380IDD-1#TRPBF FAQ
1.How can I place an order for LTC4380IDD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380IDD-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 LTC4380IDD-1#TRPBF reliable?
The price and inventory of LTC4380IDD-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 LTC4380IDD-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380IDD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380IDD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380IDD-1#TRPBF?
LTC4380IDD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380IDD-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 LTC4380IDD-1#TRPBF?
For technical support, including LTC4380IDD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380IDD-1#TRPBF requirements.
6.How does Aetrix verify that LTC4380IDD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380IDD-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 LTC4380IDD-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380IDD-1#TRPBF?
All LTC4380IDD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380IDD-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 LTC4380IDD-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380IDD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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