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Analog Devices Inc. LTC4380IDD-1#PBF
- Part No.:
- LTC4380IDD-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380IDD-1#PBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:170
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Product details
Overview
LTC4380IDD-1#PBF 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 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 drives back-to-back MOSFETs for reverse input protection down to –60V - used in 12V/24V automotive power rails.
For engineers reviewing the LTC4380IDD-1#PBF datasheet, LTC4380IDD-1#PBF pinout, LTC4380IDD-1#PBF application, or LTC4380IDD-1#PBF equivalent, key selection criteria include gate clamp voltage configurability (31.5V/50V), latchoff fault behavior, MOSFET stress acceleration via TMR-based multiplier, reverse input tolerance, and AEC-Q100-compliant operation in harsh environments.
Technical Context
The LTC4380IDD-1#PBF implements a VDS × ID multiplier on the TMR pin to dynamically shorten fault timeout based on MOSFET power dissipation, enabling SOA-aware protection during sustained overvoltage or overload. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V, with dual clamping: 31.5V/50V to GND (SEL-selectable) and VCC + 13.5V compliance limit.
It integrates undervoltage detection via the ON pin (1.05V threshold, 45mV hysteresis), open-drain FLT output signaling fault status, and supports both latchoff (–1/–3) and auto-retry (–2/–4) variants - this part is the –1 variant with latchoff behavior and fixed gate clamp. Reverse input protection operates with –60V tolerance and <2µA reverse leakage at –60V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input supply - supports 12V/24V/28V automotive systems and industrial rails without external regulation. |
| Quiescent Current | 8µA typical at 25°C - enables always-on battery-powered applications with minimal standby drain. |
| Gate Clamp Options | 31.5V (SEL = GND) or 50V (SEL = VCC) - sets output clamp ~27V or ~45V respectively for 12V/24V system compatibility. |
| Current Limit Threshold | 50mV (OUT > 3V), rising to 62mV (OUT < 1.5V) - provides tighter short-circuit limiting during severe faults. |
| Fault Timer Behavior | Latchoff (non-retry) - requires ON pin pulse <100µs or power cycle to reset after TMR reaches 1.215V. |
| Reverse Input Rating | –60V with <2mA reverse current - eliminates need for series Schottky diode in reverse-battery protection. |
| Package & Temp Grade | 10-lead 3mm × 3mm DFN, –40°C to +85°C (I-grade) - suitable for under-hood and industrial control environments. |
Pinout & Package
Package: 10-Lead (3mm × 3mm) Plastic DFN with exposed pad (Pin 11 = GND, optional PCB connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device ground reference | Common return for all internal circuits; exposed pad must be connected to system GND for thermal and EMI performance. |
| VCC | Positive supply input | Accepts 4V–72V; withstands –60V reverse; powers internal circuitry and charge pump; clamped externally for >80V transients. |
| OUT | Output voltage sense | Senses load-side voltage; internal clamp limits GATE–OUT to 17V; requires ≥22µF local bypass for stability. |
| SNS | Current sense input | Monitors voltage drop across external sense resistor (RSNS); controls current limit amplifier to hold ΔVSNS at 50/62mV. |
| DRN | MOSFET drain-source sense | Tracks OUT; current through RDRN ∝ VDS; feeds multiplier with SNS current to generate TMR fault current proportional to MOSFET power. |
| GATE | N-MOSFET gate driver | 20µA charge pump regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) or VCC + 13.5V; requires 47nF + 33Ω RC compensation. |
| ON | Enable/UV detect/shutdown | 1.05V threshold with 45mV hysteresis; open = enabled via 1MΩ pull-up; <1V = shutdown (IQ drops to 6µA); tolerates –60V to 80V. |
| SEL | Gate clamp select | GND = 31.5V clamp (12V systems); VCC/OUT = 50V clamp (24V/28V systems); tied to GND for LTC4380-1 functionality. |
| FLT | Open-drain fault indicator | Pulls low when TMR ≥ 1.215V (overvoltage/overcurrent); sinks up to 3mA; high-Z otherwise; resets only on power cycle or ON pulse. |
| TMR | Fault timer integrator | Capacitor-connected node; current sourced/sunk based on MOSFET stress; 1.215V threshold triggers latchoff; no auto-retry in –1 variant. |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA operating current | Enables direct connection to vehicle battery for always-on modules without excessive parasitic drain. |
| SEL-selectable 31.5V/50V gate clamp | Allows single BOM to support both 12V (27V clamp) and 24V/28V (45V clamp) automotive platforms. |
| Back-to-back MOSFET drive | Eliminates Schottky diode forward drop and heat, enabling efficient reverse input protection to –60V. |
| VDS × ID stress-sensing multiplier | Reduces fault timeout under high-power-dissipation conditions, keeping MOSFET within SOA during sustained surges. |
| Latchoff fault response | Prevents uncontrolled cycling during persistent faults - ensures system remains safe until deliberate reset. |
Applications
| Automotive Load Dump Protection | Industrial Power Rail Surge Suppression |
|---|---|
Use Scenario: Protecting infotainment ECUs and ADAS sensors from ISO 7637-2 Pulse 5a/b (12V systems: 110V/250Vpk, 24V systems: 200V/300Vpk). IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET as high-side switch; clamps output to 27V/45V before MOSFET enters linear region. Use Value: Prevents damage to downstream 3.3V/5V regulators and microcontrollers during alternator load dump events. |
Use Scenario: Securing programmable logic controllers (PLCs) and I/O modules against lightning-induced transients on 24V DC field wiring. IC Role / Device Role / Timing Role: High-voltage transient limiter using adjustable fault timing (via CTMR) to ride through <100ms surges while blocking longer events. Use Value: Maintains uninterrupted operation during brief grid disturbances while preventing MOSFET thermal runaway during sustained overvoltage. |
| Battery-Powered Always-On Systems | Reverse Battery Protection for Telematics |
Use Scenario: Enabling GPS trackers and remote diagnostics units to remain powered from vehicle battery without draining it during parking. IC Role / Device Role / Timing Role: Low-IQ enable controller with UV lockout (1.05V ON threshold) and 6µA shutdown current. Use Value: Extends battery life beyond 1 year in sleep mode while ensuring reliable wake-up upon ignition or CAN activity. |
Use Scenario: Protecting telematics control units (TCUs) from accidental reverse battery connection during service or jump-start attempts. IC Role / Device Role / Timing Role: Bidirectional MOSFET controller supporting back-to-back configuration for symmetrical –60V tolerance. Use Value: Replaces bulky Schottky diodes with near-zero forward voltage drop and negligible thermal dissipation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge stopper applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380IMS-1#PBF | Same electrical specs and –1 latchoff behavior, but in 10-lead MSOP package (5.0mm × 4.4mm vs DFN's 3mm × 3mm). | Preferred where manual assembly, thermal relief pads, or legacy MSOP footprint compatibility is required. | Select if board space allows larger package and reflow profile favors MSOP; identical functionality and temp grade (–40°C to 85°C). |
| LTC4380IDD-2#PBF | Identical DFN package and temp grade, but auto-retry (–2) fault behavior instead of latchoff (–1). | Suitable for non-safety-critical systems requiring automatic recovery after transient overvoltage without host intervention. | Choose when continuous operation outweighs safety-critical latching; note retry duty cycle is <0.2% under heavy fault - avoids thermal accumulation. |
Compared with LTC4380IMS-1#PBF, LTC4380IDD-1#PBF saves 58% PCB area and improves thermal resistance (θJA = 43°C/W vs 160°C/W); compared with LTC4380IDD-2#PBF, it guarantees fail-safe shutdown during persistent faults, eliminating risk of repeated MOSFET stress cycles.
Availability
LTC4380IDD-1#PBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial 24V rail surge suppression, and battery-powered always-on systems requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant reliability.
Supply support for LTC4380IDD-1#PBF 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 since 1965.
The LTC4380 product line delivers robust, low-quiescent-current surge protection ICs designed specifically for automotive and industrial power systems facing load dump, reverse battery, and transient overvoltage threats - with configurable fault response and MOSFET stress awareness.
FAQ
What is the gate clamp voltage configuration for LTC4380IDD-1#PBF?
The LTC4380IDD-1#PBF implements fixed internal gate clamp voltages: 31.5V when SEL is tied to GND (for 12V systems), or 50V when SEL is tied to VCC/OUT (for 24V/28V systems). This part is the –1 variant, confirming latchoff behavior and fixed-clamp architecture - no external Zener is needed for basic operation.
Does LTC4380IDD-1#PBF support reverse input protection?
Yes, LTC4380IDD-1#PBF supports reverse input protection to –60V by driving back-to-back N-channel MOSFETs. With ON and SEL grounded, it draws <2mA reverse current at –60V and maintains functional integrity - eliminating Schottky diodes and their associated 0.3–0.5V forward drop and thermal loss.
How does the fault timer work in LTC4380IDD-1#PBF?
LTC4380IDD-1#PBF uses a TMR pin capacitor (CTMR) to set fault timeout. An internal multiplier generates current proportional to MOSFET VDS × ID, accelerating timeout under high stress. At 1.215V, it latches off permanently - requiring either a power cycle or >100µs low pulse on the ON pin to reset. No auto-retry occurs.
What is the operating temperature range of LTC4380IDD-1#PBF?
LTC4380IDD-1#PBF is rated for –40°C to +85°C ambient operation (I-grade), validated per manufacturer specifications. Its DFN package delivers θJA = 43°C/W, enabling reliable performance in under-hood automotive locations and industrial enclosures without forced airflow.
Can LTC4380IDD-1#PBF drive high-side N-MOSFETs in 72V systems?
Yes, LTC4380IDD-1#PBF supports input voltages up to 72V and drives N-MOSFET gates via a regulated 20µA charge pump (VOUT + 11.5V). Gate voltage is clamped to 31.5V/50V (SEL-dependent) or limited to VCC + 13.5V - enabling safe operation with 80V-rated MOSFETs in 72V rail applications.
LTC4380IDD-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-WFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC4380IDD-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380IDD-1#PBF 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#PBF reliable?
The price and inventory of LTC4380IDD-1#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC4380IDD-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380IDD-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380IDD-1#PBF?
LTC4380IDD-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380IDD-1#PBF 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#PBF?
For technical support, including LTC4380IDD-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380IDD-1#PBF requirements.
6.How does Aetrix verify that LTC4380IDD-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4380IDD-1#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC4380IDD-1#PBF?
All LTC4380IDD-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380IDD-1#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC4380IDD-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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