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Analog Devices Inc. LTC4380IDD-2#TRPBF
- Part No.:
- LTC4380IDD-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380IDD-2#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:474
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Product details
Overview
LTC4380IDD-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, input overvoltage (up to 250Vpk), and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, 8µA operating current, –40°C to 85°C industrial temperature range, and auto-retry fault behavior. Used in 12V/24V battery-powered systems requiring robust transient protection without Schottky diode losses.
For engineers reviewing the LTC4380IDD-2#TRPBF datasheet, LTC4380IDD-2#TRPBF pinout, LTC4380IDD-2#TRPBF application, or LTC4380IDD-2#TRPBF equivalent, key selection criteria include gate clamp voltage selectability (31.5V/50V), auto-retry vs latchoff behavior, MOSFET stress acceleration via TMR-based multiplier, reverse input protection to –60V, and AEC-Q100 qualification for automotive environments.
Technical Context
The LTC4380IDD-2#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) enforcement. Its 20µA regulated charge pump drives the GATE pin to VOUT + 11.5V during normal operation, while internal clamps limit GATE to 31.5V or 50V above GND depending on SEL state.
It supports reverse input protection to –60V, uses an accurate 1.05V ON-pin comparator for undervoltage detection and shutdown control, and delivers 6µA quiescent current in shutdown mode. The device operates across 4V–72V input range and integrates adjustable turn-on threshold, low retry duty cycle (<0.2% under heavy overvoltage), and open-drain FLT output signaling fault status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - enables direct use in 12V/24V/28V automotive and industrial rails without external regulators. |
| Quiescent Current | 8µA typical - allows integration into always-on battery systems (e.g., telematics, ECU standby) without significant drain. |
| Gate Clamp Options | 31.5V or 50V (SEL-selectable) - sets output clamp at ~27V (for 12V systems) or ~45V (for 24V/28V systems), matching common vehicle bus requirements. |
| Fault Behavior | Auto-retry (LTC4380-2 variant) - enters cool-down phase after fault, then automatically restarts; eliminates manual reset in remote deployments. |
| Reverse Input Protection | –60V - withstands reverse battery connection without damage, critical for automotive service environments. |
| Current Limit Threshold | 50mV (rising), 62mV (severe short, OUT < 1.5V) - provides precise, temperature-stable current limiting via external sense resistor. |
| Temperature Range | –40°C to +85°C (I-grade) - qualified for under-hood and industrial control applications with extended thermal margins. |
Pinout & Package
Package: 10-Lead (3mm × 3mm) Plastic DFN with exposed pad (GND). RoHS-compliant, lead-free finish, optimized for thermal dissipation in high-power transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary ground return; exposed pad must be connected to PCB ground plane for thermal and electrical integrity. |
| VCC | Positive Supply Input | Accepts 4V–72V input; tolerates –60V reverse bias; requires external Zener or RC filter for >80V transients. |
| OUT | Output Voltage Sense | Senses load-side voltage; internal clamp limits GATE–OUT to 17V; bypass with ≥22µF capacitor near pin. |
| SNS | Current Sense Input | Monitors voltage drop across external sense resistor (RSNS); regulates ΔVSNS to 50mV/62mV for current limiting. |
| DRN | MOSFET Drain–Source Sense | Tracks VDS of external N-MOSFET; generates current proportional to VDS for MOSFET stress calculation. |
| GATE | N-MOSFET Gate Driver | Drives external MOSFET gate; regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) or VCC + 13.5V. |
| ON | Turn-On / UV Detection / Shutdown | 1.05V threshold comparator; pulls low to shut down (6µA IQ); also detects input undervoltage conditions. |
| SEL | Gate Clamp Voltage Select | GND = 31.5V clamp; VCC/OUT = 50V clamp - configures output clamp level for 12V or 24V/28V system compatibility. |
| TMR | Fault Timer Integration Node | Capacitor-connected node; charges with MOSFET power-dissipation-proportional current; triggers FLT at 1.215V. |
| FLT | Open-Drain Fault Output | Pulls low during overvoltage/overcurrent faults; sinks up to 3mA; signals fault condition to host controller or LED indicator. |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA operating current | Enables permanent connection to vehicle battery without compromising standby life in infotainment or ADAS modules. |
| Auto-retry fault recovery (LTC4380-2) | Eliminates need for external reset circuitry; cools MOSFET thermally before automatic restart, improving reliability in cyclic surge environments. |
| Reverse input protection to –60V | Withstands accidental reverse-battery connection during service, reducing field failure risk in automotive OEM and aftermarket designs. |
| Multiplier-based MOSFET stress timer | TMR current scales with VDS × ID, shortening fault timeout under high-power dissipation - keeps MOSFET within SOA during sustained transients. |
| Back-to-back MOSFET support | GATE pin drives two N-MOSFETs in series for bidirectional blocking - replaces lossy Schottky diodes in reverse-polarity protection circuits. |
| AEC-Q100 qualified (Grade I) | Validated for automotive use per stress test requirements - supports deployment in engine control, body electronics, and ADAS subsystems. |
Applications
| Automotive Load Dump Protection | Industrial Power Rail Protection |
|---|---|
|
Use Scenario: Protecting infotainment head units and ADAS cameras from 12V system load dump surges (up to 250Vpk, 400ms). IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET; clamps output to 27V using 31.5V gate clamp (SEL = GND); auto-retry ensures uninterrupted operation after transient. Use Value: Prevents damage to 3.3V/5V downstream logic without derating or oversized TVS, reducing BOM cost and board space. |
Use Scenario: Securing programmable logic controllers (PLCs) and HMIs against 24V DC rail surges caused by inductive load switching or lightning-induced coupling. IC Role / Device Role / Timing Role: High-side switch supervisor; uses 50V gate clamp (SEL = VCC) to limit output to ~45V; monitors VDS and ID to enforce MOSFET SOA during sustained overloads. Use Value: Replaces discrete crowbar circuits with single IC + MOSFET, simplifying design and improving response time versus relay-based protection. |
| Battery-Powered Always-On Systems | Hot-Swap Power Distribution |
|
Use Scenario: Maintaining backup power to real-time clocks and security microcontrollers in fleet tracking devices powered by 12V vehicle battery. IC Role / Device Role / Timing Role: Low-IQ high-side switch; draws only 8µA in active mode and 6µA in shutdown; ON pin doubles as undervoltage lockout at 1.05V. Use Value: Extends battery life beyond 5 years in sleep mode while ensuring clean startup and graceful shutdown during brownout. |
Use Scenario: Enabling safe insertion/removal of peripheral modules (e.g., sensor cards, comms boards) in modular industrial equipment with live 24V backplane. IC Role / Device Role / Timing Role: Controlled inrush limiter and fault protector; soft-starts load via GATE ramp; shuts off within 4µs of overcurrent detection (tOFF(OC)). Use Value: Prevents arcing and bus voltage sag during hot-swap events, eliminating need for complex sequencing ICs or discrete timers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380IMS-2#TRPBF | Same functionality and pinout, but in 10-lead MSOP package (θJA = 160°C/W vs DFN's 43°C/W); higher thermal resistance limits continuous power handling. | Preferred for prototyping or low-volume layouts where DFN rework is challenging; unsuitable for high-ambient or high-duty-cycle surge environments. | Select LTC4380IMS-2#TRPBF only when MSOP footprint is required; verify thermal margin with worst-case fault duration and ambient. |
| LTC4380IDD-1#TRPBF | Identical DFN package and specs, but latchoff (not auto-retry) fault behavior - requires ON pin pulse or power cycle to recover after fault. | Suitable for safety-critical systems where automatic restart is prohibited (e.g., brake control modules); increases system-level fault management complexity. | Choose LTC4380IDD-1#TRPBF only if explicit fault latching is mandated by functional safety requirements (e.g., ISO 26262 ASIL-B). |
Compared with LTC4380IMS-2#TRPBF, the LTC4380IDD-2#TRPBF offers superior thermal performance and smaller footprint; compared with LTC4380IDD-1#TRPBF, it eliminates manual intervention after transient events - making it optimal for unattended, high-availability 12V/24V systems.
Availability
LTC4380IDD-2#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial 24V rail hardening, and battery-powered always-on systems requiring stable component supply across extended product lifecycles.
Supply support for LTC4380IDD-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The LTC4380 family was designed specifically for robust, low-power transient protection in harsh environments - targeting automotive load dump, industrial surge immunity, and high-reliability hot-swap applications with minimal external components.
FAQ
What is the gate clamp voltage configuration for LTC4380IDD-2#TRPBF?
The LTC4380IDD-2#TRPBF supports two fixed gate clamp voltages: 31.5V (when SEL is tied to GND) and 50V (when SEL is tied to VCC or OUT). This directly determines the output voltage clamp level - approximately 27V for 12V systems or ~45V for 24V/28V systems - and is confirmed in the device's pin function description and Table 1 of the datasheet.
Does LTC4380IDD-2#TRPBF support reverse battery protection?
Yes, LTC4380IDD-2#TRPBF supports reverse input protection to –60V on the VCC pin, as specified in Absolute Maximum Ratings and verified in the PIN FUNCTIONS section. This allows safe operation during accidental reverse-battery connection in automotive service scenarios without external diodes or protection circuitry.
How does the fault timer in LTC4380IDD-2#TRPBF respond to MOSFET stress?
The LTC4380IDD-2#TRPBF uses a multiplier architecture where TMR pin current scales with both VDS (measured at DRN) and ID (measured via SNS–OUT), resulting in faster fault timeout under high-power MOSFET stress. This ensures the external MOSFET remains within its safe operating area during sustained overvoltage or overload events.
What is the difference between LTC4380IDD-2#TRPBF and LTC4380IDD-1#TRPBF?
LTC4380IDD-2#TRPBF implements auto-retry fault behavior - after a fault, it enters a cool-down period and automatically restarts. LTC4380IDD-1#TRPBF latches off and requires either an ON pin pulse (>100µs low) or power cycle to recover. Both share identical pinout, package, and electrical specs except for this behavioral distinction.
Can LTC4380IDD-2#TRPBF drive back-to-back N-channel MOSFETs?
Yes, LTC4380IDD-2#TRPBF's GATE pin can drive back-to-back N-MOSFETs for reverse polarity protection, as explicitly stated in the FEATURES and PIN FUNCTIONS sections. This eliminates forward voltage drop and heat generation associated with Schottky diodes, improving efficiency in battery-powered applications.
LTC4380IDD-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)
LTC4380IDD-2#TRPBF FAQ
1.How can I place an order for LTC4380IDD-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380IDD-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 LTC4380IDD-2#TRPBF reliable?
The price and inventory of LTC4380IDD-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 LTC4380IDD-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380IDD-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380IDD-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380IDD-2#TRPBF?
LTC4380IDD-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380IDD-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 LTC4380IDD-2#TRPBF?
For technical support, including LTC4380IDD-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380IDD-2#TRPBF requirements.
6.How does Aetrix verify that LTC4380IDD-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380IDD-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 LTC4380IDD-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380IDD-2#TRPBF?
All LTC4380IDD-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380IDD-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 LTC4380IDD-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380IDD-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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