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Analog Devices Inc. LTC4380IDD-4#TRPBF
- Part No.:
- LTC4380IDD-4#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380IDD-4#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,678
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Product details
Overview
LTC4380IDD-4#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 input, overvoltage (up to 72V input), and overcurrent events. It features adjustable gate clamp voltage, 8µA operating current, -40°C to +85°C industrial temperature range, and auto-retry fault behavior. Used in 12V/24V vehicle electronics with battery backup.
For engineers reviewing the LTC4380IDD-4#TRPBF datasheet, LTC4380IDD-4#TRPBF pinout, LTC4380IDD-4#TRPBF application, or LTC4380IDD-4#TRPBF equivalent, key selection criteria include its adjustable gate clamp architecture (no internal clamp), auto-retry fault recovery, 10-pin DFN (3mm × 3mm) package, reverse input protection to –60V, and MOSFET stress-accelerated fault timing.
Technical Context
The LTC4380IDD-4#TRPBF implements a multiplier-based fault timer where TMR pin current scales with both VDS (via DRN pin) and ID (via SNS–OUT differential), enabling dynamic MOSFET safe operating area (SOA) protection. Its GATE driver operates as a regulated charge pump (11.5V above OUT) without internal gate-to-GND clamp - requiring external Zener clamping at VCC for output voltage limiting.
It supports latch-off or auto-retry behavior via part variant coding: the "-4" suffix denotes adjustable-clamp + auto-retry operation. The ON pin serves dual function - undervoltage detection (1.05V threshold) and shutdown control - reducing quiescent current to 6µA when pulled low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports 12V, 24V, and 28V automotive systems with headroom for transients |
| Quiescent Current | 8µA typical - enables always-on battery-powered applications without significant drain |
| Fault Behavior | Auto-retry with cool-down period - automatically recovers after fault clears, no manual reset required |
| Gate Clamp Architecture | No internal gate-to-GND clamp - requires external Zener at VCC to set output clamp voltage (e.g., 68V Zener → ~56V clamp) |
| Reverse Input Protection | Withstands –60V reverse battery - eliminates need for external Schottky diode in high-side switch designs |
| Package | 10-lead (3mm × 3mm) plastic DFN - compact footprint with exposed pad for thermal management |
| Temperature Range | –40°C to +85°C - qualified for industrial and extended-temperature automotive subsystems |
Pinout & Package
Package: 10-Lead (3mm × 3mm) Plastic DFN with exposed pad (Pin 11 = GND, optional PCB connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | N-channel MOSFET gate drive output | Regulated 20µA charge pump driving gate to VOUT + 11.5V; clamped to VCC + 13.5V - no internal GND clamp (requires external Zener on VCC) |
| DRN | MOSFET drain-source sense input | Current proportional to VDS; feeds multiplier for MOSFET power-dissipation-dependent fault timing |
| SNS | Current sense amplifier input | Monitors voltage across external sense resistor; regulates ΔVSNS to 50mV (62mV during severe short) for overcurrent limiting |
| OUT | Output voltage sense reference | Low-impedance sense node for output regulation and current sensing; bypass with ≥22µF capacitor |
| VCC | Positive supply input | 4V–72V operating range; withstands –60V reverse; requires external Zener for overvoltage clamp in LTC4380-4 variants |
| ON | Turn-on/shutdown & UVLO input | 1.05V threshold; pulls low to reduce IQ to 6µA; also detects input undervoltage |
| SEL | Gate clamp select (not used in -4) | Connected to GND per datasheet for LTC4380-4 - disables internal clamp logic; no functional role |
| TMR | Fault timer integrator node | Capacitor-connected node; charges with MOSFET-stress-proportional current; trips at 1.215V to initiate auto-retry cool-down cycle |
| FLT | Open-drain fault status output | Pulls low during fault; sinks up to 3mA; signals active overvoltage/overcurrent condition |
| GND | Device ground reference | Reference for all analog circuitry; exposed pad must be connected to system GND for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable gate clamp via external Zener | Enables precise output voltage limiting (e.g., 27V, 45V, or custom values) by selecting Zener on VCC - no internal clamp constraints |
| Auto-retry fault recovery | After fault timeout, enters 15-cycle cool-down (TMR swing between 1.215V–3.4V), then auto-restarts - eliminates manual intervention in remote systems |
| MOSFET stress-accelerated timing | TMR current increases with both VDS and ID, shortening fault timeout under high-power dissipation - protects MOSFET within SOA |
| Reverse input protection to –60V | Allows direct connection to battery terminals without series diode - eliminates 0.3–0.5V drop and associated heat in high-current paths |
| Ultra-low 8µA operating current | Supports permanent installation in always-on vehicle modules (e.g., telematics, ADAS sensors) without compromising battery life |
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 120V, 400ms). IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET as high-side pass element; limits output to safe level (e.g., 27V) using Zener-clamped VCC. Use Value: Prevents damage to downstream 3.3V/5V regulators and microcontrollers during ISO 7637-2 Pulse 5a events without derating MOSFET. | Use Scenario: Enabling/disabling power to body control modules (BCM) or gateway ECUs in parked state. IC Role / Device Role / Timing Role: High-side switch supervisor with undervoltage lockout (ON pin) and reverse polarity protection. Use Value: Eliminates Schottky diode losses (≈0.4W @ 1A), extends battery standby time, and blocks –60V reverse battery connection. |
| Industrial Power Sequencing | Avionic Hot-Swap Supply |
Use Scenario: Controlled startup of FPGA or DSP power rails in programmable logic controllers (PLCs) with inrush current limiting. IC Role / Device Role / Timing Role: Soft-start controller using GATE ramp rate (20µA charge pump) and current limit (50mV SNS–OUT) to manage CL inrush. Use Value: Limits peak inrush to ΔVSNS/RSNS without external timers; avoids brownouts during cold start. | Use Scenario: Insertion of line-replaceable units (LRUs) into powered avionic backplanes (MIL-STD-704F compliant). IC Role / Device Role / Timing Role: Hot-swap controller with auto-retry fault handling and fast overcurrent turn-off (2µs propagation delay). Use Value: Survives repeated plug-in surges and transient shorts; maintains system uptime via automatic recovery without pilot intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380IMS-4#TRPBF | Same functionality and pinout, but in 10-lead MSOP package (5.0mm × 4.4mm); higher θJA (160°C/W vs. 43°C/W) | Preferred for prototyping or space-tolerant layouts where DFN reflow is challenging; lower thermal performance limits continuous current | Select for hand-soldering or legacy board compatibility; avoid in thermally constrained high-current designs |
| LTC4380HDD-4#TRPBF | Identical DFN package and pinout, but rated for –40°C to +125°C junction temperature (vs. +85°C) | Required for under-hood automotive applications (e.g., engine control, transmission modules) where ambient exceeds 85°C | Choose when operating junction temperature may exceed 85°C; otherwise, LTC4380IDD-4#TRPBF offers optimal cost/performance balance |
Compared with LTC4380IMS-4#TRPBF, the LTC4380IDD-4#TRPBF delivers superior thermal performance in compact space-constrained designs; compared with LTC4380HDD-4#TRPBF, it provides identical surge protection functionality at lower cost for industrial and cabin-mounted automotive applications.
Availability
LTC4380IDD-4#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, high-side battery switching, and industrial hot-swap applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LTC4380IDD-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 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-quiescent-current surge protection ICs designed specifically for automotive, avionic, and industrial power rail hardening - emphasizing MOSFET SOA protection, reverse polarity resilience, and ultra-low standby power.
FAQ
What is the gate clamp configuration of the LTC4380IDD-4#TRPBF?
The LTC4380IDD-4#TRPBF has no internal gate-to-GND clamp. Its GATE pin is only limited to VCC + 13.5V. To set a specific output clamp voltage (e.g., 27V), a Zener diode must be placed between VCC and GND - the resulting VCC clamp defines the effective GATE clamp and thus output limit. This distinguishes it from LTC4380-1/-2 variants with fixed 31.5V/50V clamps.
How does the LTC4380IDD-4#TRPBF implement auto-retry fault recovery?
When a fault occurs, the LTC4380IDD-4#TRPBF drives the TMR pin to 1.215V, turns off the MOSFET, and pulls FLT low. It then enters a cool-down phase: TMR cycles 15 times between ~1.215V and ~3.4V with 2µA pull-up/pull-down. After the final discharge to ~100mV, the MOSFET automatically restarts. This behavior is inherent to the "-4" variant and requires no external circuitry.
Can the LTC4380IDD-4#TRPBF be used without an external MOSFET?
No. The LTC4380IDD-4#TRPBF is a controller IC only - it does not integrate a power MOSFET. It requires an external N-channel MOSFET (e.g., FDB33N25) connected between VIN and VOUT, with DRN, SNS, and GATE pins interfaced accordingly. Operation is undefined without this external pass device.
What is the minimum recommended output capacitance for the LTC4380IDD-4#TRPBF?
The LTC4380IDD-4#TRPBF requires ≥22µF ceramic or polymer capacitor directly at the OUT pin, placed as close as possible to minimize impedance. This stabilizes the current sense loop, filters high-frequency noise on the SNS–OUT path, and ensures reliable overcurrent response. Lower values risk instability or false triggering during load transients.
Does the LTC4380IDD-4#TRPBF support reverse battery protection?
Yes. The LTC4380IDD-4#TRPBF withstands –60V applied to VCC with ON and SEL open or grounded, and GND referenced. When reverse biased, internal protection structures block conduction while maintaining <2mA reverse leakage - enabling true reverse-input protection without external diodes in high-side switch configurations.
LTC4380IDD-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)
LTC4380IDD-4#TRPBF FAQ
1.How can I place an order for LTC4380IDD-4#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380IDD-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 LTC4380IDD-4#TRPBF reliable?
The price and inventory of LTC4380IDD-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 LTC4380IDD-4#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380IDD-4#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380IDD-4#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380IDD-4#TRPBF?
LTC4380IDD-4#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380IDD-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 LTC4380IDD-4#TRPBF?
For technical support, including LTC4380IDD-4#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380IDD-4#TRPBF requirements.
6.How does Aetrix verify that LTC4380IDD-4#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380IDD-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 LTC4380IDD-4#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380IDD-4#TRPBF?
All LTC4380IDD-4#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380IDD-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 LTC4380IDD-4#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380IDD-4#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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