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Analog Devices Inc. LTC4380CDD-1#PBF
- Part No.:
- LTC4380CDD-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380CDD-1#PBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,896
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Product details
Overview
LTC4380CDD-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, input overvoltage (up to 250Vpk), and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, 8µA operating current, and latched fault behavior. Used in 12V automotive power rails with 27V output clamping.
For engineers reviewing the LTC4380CDD-1#PBF datasheet, LTC4380CDD-1#PBF pinout, LTC4380CDD-1#PBF application, or LTC4380CDD-1#PBF equivalent, key selection criteria include latchoff vs auto-retry behavior, internal gate clamp voltage (31.5V/50V), MOSFET stress acceleration via TMR-based multiplier, reverse input protection to –60V, and AEC-Q100 qualification for automotive systems.
Technical Context
The LTC4380CDD-1#PBF implements a VDS × ID multiplier on the TMR pin to dynamically shorten fault timer duration under high MOSFET power dissipation, ensuring safe operating area (SOA) compliance during sustained overvoltage or overload. Its gate drive regulates to VOUT + 11.5V and clamps to GND at 31.5V (SEL = GND) or 50V (SEL = VCC), enabling precise output voltage limiting without external components.
It integrates undervoltage detection on the ON pin (1.05V threshold), reverse input protection down to –60V, and a 10-pin DFN (3mm × 3mm) package with exposed pad. The device operates from 4V to 72V input, draws only 8µA quiescent current, and latches off upon fault-requiring ON pin reset or power cycle to recover.
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 regulation. |
| Quiescent Current | 8µA at TA = 25°C - enables always-on battery-powered applications with minimal standby drain. |
| Gate Clamp Voltage | 31.5V (SEL = GND) - limits output to ~27V in 12V systems, matching automotive load dump protection requirements. |
| Current Limit Threshold | 50mV (SNS–OUT), rising to 62mV when OUT < 1.5V - sets precise, temperature-stable current limit via sense resistor. |
| Fault Timer Reference | TMR pin threshold = 1.215V - integrates VDS × ID current to accelerate turn-off during high MOSFET stress. |
| Reverse Input Protection | Withstands –60V on VCC - eliminates need for external reverse-battery diode in harsh automotive environments. |
| Temperature Grade | 0°C to 70°C (C-grade) - suitable for cabin-located ECUs and non-critical under-hood modules. |
Pinout & Package
Package: 10-Lead (3mm × 3mm) Plastic DFN with exposed pad (Pin 11 = GND). Thermal resistance θJA = 43°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device ground reference and thermal pad connection | Exposed pad must be connected to PCB ground plane for thermal performance and EMI control. |
| VCC | Main supply input (4V–72V) | Accepts reverse voltage down to –60V; requires ≥22µF local bypass capacitance. |
| OUT | Output voltage sense node | Connects to source of external N-MOSFET; internal clamp limits GATE–OUT to 17V. |
| SNS | Current sense input (SNS–OUT = ΔVSNS) | Monitors voltage across external sense resistor; sets 50mV/62mV current limit threshold. |
| DRN | MOSFET drain-source sense input | Tracks VDS via external RDRN; feeds multiplier for MOSFET stress–adaptive fault timing. |
| GATE | N-MOSFET gate driver output | Regulated to VOUT + 11.5V; clamped to GND at 31.5V (SEL = GND); requires 47nF + 33Ω RC compensation. |
| ON | Enable/shutdown and UVLO input | 1.05V threshold; pulls part into 6µA shutdown when below threshold; tolerant to –60V to 80V. |
| SEL | Gate clamp voltage select (LTC4380-1/-2 only) | GND = 31.5V clamp; VCC/OUT = 50V clamp - configures output clamping for 12V or 24V/28V systems. |
| FLT | Open-drain fault indicator | Pulls low during latched fault; sinks up to 3mA; requires external pull-up for logic-level signaling. |
| TMR | Fault timer integration node | Capacitor-connected pin; current scales with MOSFET VDS × ID; 1.215V trip point triggers latchoff. |
Key Features
| Feature | Design Value |
|---|---|
| Latchoff fault response | Permanently disables GATE until ON pin is pulsed low ≥100µs or power is cycled - prevents uncontrolled retries during persistent faults. |
| Internal gate clamp selection | 31.5V or 50V clamp referenced to GND - eliminates need for external Zener in standard 12V/24V automotive designs. |
| MOSFET stress–adaptive timing | TMR current proportional to VDS × ID - reduces fault timeout under high-power stress, protecting MOSFET SOA. |
| Reverse input tolerance | –60V on VCC pin - enables direct connection to battery without series diode or protection IC. |
| Low-impedance N-MOSFET control | 20µA regulated charge pump driving GATE to VOUT + 11.5V - achieves <20mΩ RDS(on) with common automotive MOSFETs. |
Applications
| Automotive Load Dump Protection | Always-On Battery-Powered Module |
|---|---|
Use Scenario: 12V vehicle electrical system subjected to ISO 7637-2 Pulse 5a (load dump up to 120V, 400ms). IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET to clamp output at 27V and limit energy delivered to ECU. Use Value: Prevents damage to downstream 3.3V/5V regulators and microcontrollers without sacrificing low standby current. |
Use Scenario: Telematics module requiring continuous power monitoring and GPS wake-up while parked. IC Role / Device Role / Timing Role: Always-on front-end protector enabling <8µA quiescent draw while blocking reverse battery and transients. Use Value: Extends vehicle battery life beyond 60 days in parking mode without risk of deep discharge. |
| Industrial 24V DC Power Rail | Hot-Swap Power Entry |
Use Scenario: Factory automation controller powered from 24V industrial bus with frequent cable disconnect/reconnect events. IC Role / Device Role / Timing Role: Input protector enforcing 45V output clamp (SEL = VCC) and latching off during short-circuit faults. Use Value: Eliminates need for manual reset after fault; ensures system remains isolated until maintenance intervention. |
Use Scenario: Modular server backplane accepting hot-plug power cards with varying input impedance. IC Role / Device Role / Timing Role: High-side switch supervisor using ON pin for controlled turn-on and FLT for fault reporting. Use Value: Prevents inrush current damage and provides deterministic fault isolation without software dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380CDD-2#PBF | Same pinout and gate clamp, but auto-retry (not latchoff) fault behavior; TMR cool-down cycle enables automatic recovery. | Suitable where transient overloads are expected and manual reset is impractical (e.g., remote sensors). | Select LTC4380CDD-2#PBF if system must self-recover after brief overvoltage without host intervention. |
| TPS26631RGER | Integrated 60V eFuse with 1.2A current limit; no external MOSFET required; fixed 1.2ms overcurrent response; no VDS-based stress acceleration. | Targets space-constrained designs needing monolithic protection, not high-current or ultra-low IQ applications. | Choose TPS26631RGER when board area is critical and 1.2A max load current suffices; LTC4380CDD-1#PBF supports higher currents via discrete MOSFET. |
Compared with LTC4380CDD-2#PBF, the LTC4380CDD-1#PBF provides deterministic latchoff for safety-critical fault containment, while TPS26631RGER trades external MOSFET flexibility and sub-10µA IQ for integration and faster fixed overcurrent response.
Availability
LTC4380CDD-1#PBF is available at Aetrix Electronics and suitable for automotive load dump protection, always-on battery-powered modules, and industrial 24V DC power rail applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for LTC4380CDD-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 automotive, industrial, communications, and healthcare markets.
The LTC4380 product line delivers ultra-low-IQ surge protection ICs designed specifically for automotive and harsh-environment power entry, combining precision clamping, MOSFET stress awareness, and robust reverse-voltage tolerance.
FAQ
What is the gate clamp voltage configuration for LTC4380CDD-1#PBF?
The LTC4380CDD-1#PBF features a fixed internal gate clamp to ground: 31.5V when SEL is tied to GND, or 50V when SEL is tied to VCC or OUT. This defines the maximum GATE voltage and thus the output clamping level (e.g., ~27V for 31.5V clamp with typical MOSFET VTH). No external Zener is needed for these configurations.
How does LTC4380CDD-1#PBF differ from LTC4380CDD-2#PBF?
The LTC4380CDD-1#PBF uses latchoff fault behavior - it remains off after a fault until ON is pulsed low ≥100µs or power is cycled. In contrast, LTC4380CDD-2#PBF implements auto-retry with TMR cool-down cycling. Both share identical pinout, gate clamp options, and electrical specs; only fault recovery differs.
Can LTC4380CDD-1#PBF protect against reverse battery connection?
Yes. The LTC4380CDD-1#PBF tolerates –60V on the VCC pin with no damage, enabling direct connection to vehicle battery without external reverse-polarity protection. When reverse-biased, the device draws only leakage current and blocks conduction path to downstream circuitry.
What is the minimum recommended TMR capacitor value for LTC4380CDD-1#PBF?
No minimum value is specified, but CTMR must be sized to ensure sufficient fault timeout for worst-case MOSFET stress. A typical value is 8.2µF (as shown in Figure 1), yielding ~100ms timeout under moderate stress. X7R dielectric rated ≥10V is mandatory to maintain timing accuracy across temperature and bias.
Is LTC4380CDD-1#PBF AEC-Q100 qualified?
Yes. The LTC4380CDD-1#PBF is AEC-Q100 qualified for automotive applications (Grade C: 0°C to +70°C ambient), meeting stress test requirements for reliability in automotive power systems including load dump, reverse battery, and temperature cycling.
LTC4380CDD-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)
LTC4380CDD-1#PBF FAQ
1.How can I place an order for LTC4380CDD-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380CDD-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 LTC4380CDD-1#PBF reliable?
The price and inventory of LTC4380CDD-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 LTC4380CDD-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4380CDD-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380CDD-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380CDD-1#PBF?
LTC4380CDD-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380CDD-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 LTC4380CDD-1#PBF?
For technical support, including LTC4380CDD-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380CDD-1#PBF requirements.
6.How does Aetrix verify that LTC4380CDD-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4380CDD-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 LTC4380CDD-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4380CDD-1#PBF?
All LTC4380CDD-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380CDD-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 LTC4380CDD-1#PBF part is unused and in its original packaging.
Return procedure for LTC4380CDD-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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