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Analog Devices Inc. LTC4380IDD-3#TRPBF
- Part No.:
- LTC4380IDD-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380IDD-3#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,448
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Product details
Overview
LTC4380IDD-3#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, latchoff fault behavior, and −40°C to +85°C industrial temperature range. Used in 12V/24V vehicle power distribution systems with strict always-on power budgets.
For engineers reviewing the LTC4380IDD-3#TRPBF datasheet, LTC4380IDD-3#TRPBF pinout, LTC4380IDD-3#TRPBF application, or LTC4380IDD-3#TRPBF equivalent, key selection criteria include its adjustable gate clamp architecture (no internal 31.5V/50V clamp), latchoff-only fault response, −60V reverse input tolerance, 4V–72V operating range, and DFN-10 (3mm × 3mm) package compatibility with high-density PCB layouts.
Technical Context
The LTC4380IDD-3#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 proportional to instantaneous power dissipation. Its GATE driver regulates to VOUT + 11.5V and lacks internal gate-to-GND clamps-requiring external Zener clamping at VCC to set output voltage limits.
It uses an ON pin comparator for undervoltage detection (1.05V threshold) and shutdown control, reducing quiescent current to 6µA. The SEL pin is fixed to GND per -3 variant specification, disabling internal clamp selection logic and confirming fully external gate voltage control via VCC clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports 12V/24V/28V automotive and industrial rails without external regulators. |
| Quiescent Current | 8µA typical - enables direct connection to vehicle battery for always-on monitoring without excessive drain. |
| Fault Response | Latchoff only - requires ON pin pulse <100µs or power cycle to reset after overvoltage/overcurrent event. |
| Reverse Input Protection | −60V - withstands reverse battery connection without damage or external diode. |
| Gate Drive Compliance | VGATE = VOUT + 11.5V max - defines maximum enhancement voltage; output clamp set externally via VCC Zener. |
| Current Limit Threshold | 50mV (rising), 62mV (severe short) - sets precise load current limit using external sense resistor (e.g., 20mΩ → 2.5A/3.1A). |
| Package | 10-lead 3mm × 3mm DFN - exposes thermal pad for efficient heat dissipation in high-power surge scenarios. |
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 | Common return for all internal circuits and exposed thermal pad; must be low-impedance for stable fault timing. |
| OUT | Output voltage sense | Connects to MOSFET source terminal; senses regulated output; bypass with ≥22µF capacitor for stability. |
| SNS | Current sense input | Connects to MOSFET source-side of sense resistor; monitors ΔVSNS to enforce 50/62mV current limit. |
| DRN | MOSFET drain-source sense | Tracks VDS via external RDRN; feeds multiplier to accelerate TMR charging during high-stress faults. |
| GATE | N-MOSFET gate drive | Drives external MOSFET gate; regulated to VOUT + 11.5V; requires ≥47nF + 33Ω RC compensation network. |
| VCC | Main supply input | Accepts 4V–72V; clamped externally (e.g., 68V Zener) to define GATE clamp and output limit for -3 variant. |
| ON | Enable/shutdown control | 1.05V threshold; open = enabled; <0.99V = shutdown (6µA IQ); pulsed low resets latched fault. |
| FLT | Open-drain fault indicator | Pulls low during fault; sinks up to 3mA; signals latchoff condition to system controller or status LED. |
| TMR | Fault timer integration node | Capacitor-connected node; charges at rate proportional to MOSFET power dissipation; trips at 1.215V. |
| SEL | Gate clamp select (fixed) | Internally tied to GND for LTC4380-3 variants; disables internal 31.5V/50V clamp logic entirely. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable gate clamp architecture | No internal gate-to-GND clamp - full output voltage control achieved by clamping VCC (e.g., 68V Zener → ~63V output limit). |
| Latchoff-only fault behavior | Eliminates uncontrolled auto-retry cycles during persistent faults; ensures system-level intervention before recovery. |
| MOSFET stress-accelerated timing | TMR current scales with VDS × ID, shortening fault timeout under high-power conditions to keep MOSFET within SOA. |
| Reverse input tolerance | Withstands −60V on VCC without damage - replaces Schottky diode reverse protection with zero forward drop. |
| Ultra-low operating current | 8µA IQ enables direct battery connection in always-on telematics, ADAS, and infotainment modules. |
Applications
| Automotive Load Dump Protection | Industrial Power Rail Conditioning |
|---|---|
Use Scenario: Protecting infotainment head units from 12V system 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 safe level (e.g., 27V) via VCC Zener. Use Value: Prevents damage to downstream DC/DC converters and microcontrollers without derating input capacitors or adding TVS arrays. |
Use Scenario: Securing programmable logic controllers (PLCs) against 24V rail surges caused by inductive load switching. IC Role / Device Role / Timing Role: High-voltage front-end protector with latchoff behavior; isolates faulty rail until maintenance reset. Use Value: Avoids nuisance tripping during transient spikes while guaranteeing hard shutdown during sustained overvoltage. |
| Battery-Powered Telematics | Avionic Power Sequencing |
Use Scenario: Enabling always-on GPS tracking modules in fleet vehicles with minimal battery drain. IC Role / Device Role / Timing Role: Low-IQ (8µA) enable controller with reverse polarity protection and UVLO monitoring. Use Value: Extends battery life >5 years in sleep mode while maintaining robust fault coverage across −40°C to +85°C. |
Use Scenario: Safeguarding flight control interface boards from 28V aircraft bus transients and reverse connection. IC Role / Device Role / Timing Role: AEC-Q100 qualified surge stopper with −60V reverse tolerance and latchoff for deterministic fault isolation. Use Value: Meets DO-160 Section 22 surge immunity requirements without compromising board space or thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380IDD-1#TRPBF | Fixed 31.5V/50V internal gate clamp; SEL pin functional; same latchoff behavior. | Predefined clamp voltages simplify design for standard 12V/24V systems but lack flexibility for custom output limits. | Select when output clamping at 27V or 45V is sufficient and external Zener clamping is undesirable. |
| LTC4380IMS-3#TRPBF | Same -3 functionality but in MSOP-10 package; θJA = 160°C/W vs. DFN's 43°C/W. | Lower thermal performance limits continuous current handling; suitable for lower-power or space-constrained layouts. | Select when board real estate favors MSOP or existing layout uses MSOP footprints; verify thermal derating. |
Compared with LTC4380IDD-1#TRPBF, the LTC4380IDD-3#TRPBF trades internal clamp convenience for full external voltage control, while versus LTC4380IMS-3#TRPBF it delivers superior thermal management in high-surge-duty applications due to its DFN package's lower junction-to-ambient resistance.
Availability
LTC4380IDD-3#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial PLC power conditioning, and battery-powered telematics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4380IDD-3#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 and harsh-environment power systems where reliability, reverse polarity tolerance, and MOSFET SOA management are critical.
FAQ
What is the gate clamp configuration of the LTC4380IDD-3#TRPBF?
The LTC4380IDD-3#TRPBF has no internal gate-to-ground clamp. Its GATE pin is regulated to VOUT + 11.5V, and output voltage limiting is achieved solely by clamping the VCC pin with an external Zener diode (e.g., 68V). This allows precise, application-specific output clamping without fixed thresholds.
Does the LTC4380IDD-3#TRPBF support auto-retry after a fault?
No. The LTC4380IDD-3#TRPBF implements latchoff-only fault behavior. Once tripped by overvoltage or overcurrent, the device remains off until the ON pin is pulsed low for at least 100µs or power is cycled. This ensures deterministic system-level fault handling without uncontrolled restart attempts.
How does the LTC4380IDD-3#TRPBF achieve reverse input protection?
The LTC4380IDD-3#TRPBF withstands −60V on the VCC pin without damage, eliminating the need for external Schottky diodes. When reverse voltage is applied, internal protection structures block conduction while preserving functionality - reducing forward voltage drop, power loss, and board area versus discrete diode solutions.
What is the role of the DRN pin in the LTC4380IDD-3#TRPBF?
The DRN pin senses MOSFET VDS via an external resistor (RDRN) and feeds this signal into an internal multiplier. Combined with SNS–OUT current sense, it generates TMR pin current proportional to MOSFET power dissipation - enabling faster fault timeout under high-stress conditions and protecting the MOSFET's safe operating area.
Can the LTC4380IDD-3#TRPBF operate from a 4V input supply?
Yes. The LTC4380IDD-3#TRPBF operates from 4V to 72V on VCC. At 4V, total supply current is 22–35µA (depending on grade), and gate drive capability remains functional - enabling use in brownout-prone automotive start-stop systems and low-voltage industrial sensors.
LTC4380IDD-3#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-3#TRPBF FAQ
1.How can I place an order for LTC4380IDD-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380IDD-3#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-3#TRPBF reliable?
The price and inventory of LTC4380IDD-3#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-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380IDD-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380IDD-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380IDD-3#TRPBF?
LTC4380IDD-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380IDD-3#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-3#TRPBF?
For technical support, including LTC4380IDD-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380IDD-3#TRPBF requirements.
6.How does Aetrix verify that LTC4380IDD-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380IDD-3#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-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380IDD-3#TRPBF?
All LTC4380IDD-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380IDD-3#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-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380IDD-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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