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Analog Devices Inc. LTC4380CDD-1#TRPBF
- Part No.:
- LTC4380CDD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380CDD-1#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,880
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Product details
Overview
LTC4380CDD-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, input overvoltage (up to 250Vpk), and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, 8µA operating current, and 50mV current limit threshold. Used in 12V automotive power rails with 27V output clamping.
For engineers reviewing the LTC4380CDD-1#TRPBF datasheet, LTC4380CDD-1#TRPBF pinout, LTC4380CDD-1#TRPBF application, or LTC4380CDD-1#TRPBF equivalent, key selection criteria include gate clamp voltage configuration (SEL = GND → 31.5V), latchoff fault behavior, AEC-Q100 qualification for automotive use, and compatibility with 3mm × 3mm DFN packaging.
Technical Context
The LTC4380CDD-1#TRPBF implements a multiplier-based fault timer where TMR pin current scales with both MOSFET VDS (via DRN pin) and ID (via SNS–OUT differential), enabling dynamic SOA protection. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V during normal operation.
As the "-1" variant, it provides fixed internal gate clamp voltages (31.5V/50V referenced to GND) and latches off upon fault detection-requiring ON pin reset or power cycle. It does not support auto-retry or adjustable clamp modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V on VCC; supports 12V/24V/28V automotive systems with reverse input tolerance to –60V |
| Quiescent Current | 8µA typical at 25°C; enables always-on battery-powered applications without excessive drain |
| Gate Clamp Voltage | 31.5V (SEL = GND) or 50V (SEL = VCC); sets output clamp ~27V or ~45V respectively for N-MOSFET pass device |
| Current Limit Threshold | 50mV (SNS–OUT) rising to 62mV when OUT < 1.5V; defines precise, temperature-stable overcurrent trip point |
| Fault Response | Latchoff mode: MOSFET remains off after TMR reaches 1.215V until ON pin pulsed low ≥100µs or power cycled |
| Package | 10-lead 3mm × 3mm DFN (DD package); exposed pad connected to GND for thermal performance |
| Temperature Grade | C-grade: 0°C to 70°C ambient; validated for commercial and industrial control applications |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed thermal pad (Pin 11 = GND, optional PCB connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device ground reference and thermal pad connection | Primary return path for all internal circuits; exposed pad must be soldered to PCB ground plane for thermal reliability |
| VCC | Main supply input | Accepts 4V–80V input; withstands –60V reverse bias; requires external Zener or RC filter for >80V transients |
| OUT | Output voltage sense node | Connects to MOSFET source terminal; senses regulated output; bypassed with ≥22µF capacitor |
| SNS | Current sense input | Connects to high-side of current sense resistor; monitors load current via ΔVSNS; limited to ±5V differential |
| DRN | MOSFET drain-source sense | Tracks VDS via external RDRN; feeds multiplier for MOSFET stress-dependent fault timing |
| GATE | N-MOSFET gate driver | Drives external FET gate; clamped to 31.5V/50V (SEL-configurable); includes 47nF/33Ω compensation network |
| ON | Enable/shutdown and UVLO input | Turns device on at >1.05V; shuts down to 6µA quiescent current when pulled below threshold |
| SEL | Gate clamp voltage select | Ground = 31.5V clamp; connect to VCC = 50V clamp; determines output clamping level for 12V vs 24V systems |
| FLT | Open-drain fault indicator | Pulls low during latchoff fault; sinks up to 3mA; signals permanent shutdown until reset |
| TMR | Fault timer integration node | Connects to timing capacitor (CTMR); charges to 1.215V to trigger latchoff; no auto-retry cooling cycle |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA operating current | Enables direct connection to vehicle battery for always-on ECU modules without parasitic drain concerns |
| Fixed dual-voltage gate clamp (31.5V/50V) | Eliminates need for external clamp components in 12V or 24V/28V automotive designs; simplifies BOM |
| Latchoff fault response | Prevents uncontrolled cycling during sustained faults-critical for safety-critical automotive subsystems |
| Reverse input protection to –60V | Withstands accidental battery reversal without damage; no external diode or protection circuit required |
| AEC-Q100 qualified (C-grade) | Validated for automotive environments including temperature cycling, vibration, and ESD robustness |
Applications
| Automotive Load Dump Protection | Industrial Power Rail Surge Suppression |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS sensors from 12V system load dump transients (up to 250Vpk, 400ms duration). 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 damage to downstream 28V-rated DC-DC converters and microcontrollers without derating or oversized TVS diodes. |
Use Scenario: Securing programmable logic controllers (PLCs) against 48V rail surges caused by inductive load switching or lightning-induced coupling. IC Role / Device Role / Timing Role: High-voltage transient limiter with latchoff behavior; integrates with discrete MOSFET to replace bulky MOV+SCR crowbar solutions. Use Value: Reduces board space by >65% versus discrete protection schemes while maintaining fail-safe shutdown on sustained overvoltage. |
| Always-On Battery-Powered Monitoring | High-Side Switch for Telematics Modules |
Use Scenario: Powering GPS/GNSS receivers and CAN bus monitors in parked vehicle mode with <10µA total system leakage. IC Role / Device Role / Timing Role: Ultra-low-IQ enable controller; uses ON pin for wake-up signaling and UVLO monitoring at battery input. Use Value: Extends lithium-thionyl chloride battery life beyond 10 years in remote asset trackers without compromising surge immunity. |
Use Scenario: Enabling/disabling telematics gateway power domains based on ignition status and cellular network activity. IC Role / Device Role / Timing Role: Precision-controlled high-side switch with programmable turn-on delay (5–25ms) and fast turn-off (<5µs). Use Value: Eliminates Schottky diode forward drop and heat dissipation; achieves <10mΩ effective RDS(on) with FDB33N25 MOSFET. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge stopper applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380CDD-2#TRPBF | Same pinout and clamp voltages, but auto-retry (cool-down) fault behavior instead of latchoff | Suitable for non-safety-critical systems requiring automatic recovery after transient overvoltage | Select when continuous operation after brief surges is preferred; avoid in ASIL-B/C systems requiring explicit reset |
| LTC4380IMS-1#TRPBF | Identical functionality and latchoff behavior, but in MSOP-10 package (5mm × 3mm) and I-grade (–40°C to 85°C) | Better thermal performance in convection-cooled industrial enclosures; wider temp range than C-grade | Choose for extended temperature operation or manual assembly; DFN offers superior thermal resistance in automated SMT lines |
Compared with LTC4380CDD-1#TRPBF, the -2 variant trades deterministic latchoff for autonomous recovery-reducing system-level watchdog requirements but increasing risk of repeated MOSFET stress during persistent faults. The IMS-1 offers identical protection logic with enhanced thermal margin and temperature range, at the cost of larger footprint and higher package inductance.
Availability
LTC4380CDD-1#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial PLC power rails, and always-on telematics modules requiring stable component supply across multi-year production cycles.
Supply support for LTC4380CDD-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 product line delivers ultra-low-quiescent-current surge protection ICs designed specifically for automotive and harsh-environment power systems where reliability, latchoff safety, and AEC-Q100 compliance are mandatory.
FAQ
What is the gate clamp voltage configuration for LTC4380CDD-1#TRPBF?
The LTC4380CDD-1#TRPBF has fixed internal gate clamp voltages of 31.5V or 50V referenced to GND. Selection is made by connecting the SEL pin to GND (31.5V) or VCC (50V). This directly determines the output clamping level-e.g., 31.5V clamp yields ~27V output with a typical 5V MOSFET threshold. No external clamp components are needed for these configurations.
Does LTC4380CDD-1#TRPBF support auto-retry after a fault?
No. LTC4380CDD-1#TRPBF implements latchoff fault behavior: once the TMR pin reaches 1.215V, the MOSFET turns off permanently until the ON pin is pulled low for at least 100µs or power is cycled. This differs from the -2 and -4 variants, which feature auto-retry with cool-down timing. Latchoff ensures no uncontrolled re-engagement during sustained overvoltage conditions.
What is the maximum reverse input voltage the LTC4380CDD-1#TRPBF can withstand?
The LTC4380CDD-1#TRPBF withstands reverse input voltages down to –60V on the VCC pin without damage. This is explicitly rated in the Absolute Maximum Ratings table and enables direct connection to automotive batteries without external reverse-polarity protection diodes or MOSFETs-reducing BOM count and forward voltage drop.
How is current limiting implemented in LTC4380CDD-1#TRPBF?
LTC4380CDD-1#TRPBF limits load current by regulating the GATE pin to hold the SNS–OUT differential voltage at 50mV under normal conditions (OUT > 3V), rising to 62mV when OUT falls below 1.5V. This corresponds to a precise current threshold of ILOAD = 50mV / RSNS, providing accurate, temperature-stable overcurrent protection independent of MOSFET characteristics.
Is LTC4380CDD-1#TRPBF qualified for automotive applications?
Yes. LTC4380CDD-1#TRPBF is AEC-Q100 qualified for automotive applications. Its C-grade temperature range (0°C to 70°C) and qualification testing cover requirements for cabin and non-engine-compartment automotive electronics, including infotainment, body control modules, and telematics gateways.
LTC4380CDD-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)
LTC4380CDD-1#TRPBF FAQ
1.How can I place an order for LTC4380CDD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380CDD-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 LTC4380CDD-1#TRPBF reliable?
The price and inventory of LTC4380CDD-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 LTC4380CDD-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380CDD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380CDD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380CDD-1#TRPBF?
LTC4380CDD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380CDD-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 LTC4380CDD-1#TRPBF?
For technical support, including LTC4380CDD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380CDD-1#TRPBF requirements.
6.How does Aetrix verify that LTC4380CDD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380CDD-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 LTC4380CDD-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380CDD-1#TRPBF?
All LTC4380CDD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380CDD-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 LTC4380CDD-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380CDD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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