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Analog Devices Inc. LTC4380CDD-2#PBF
- Part No.:
- LTC4380CDD-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380CDD-2#PBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,816
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Product details
Overview
LTC4380CDD-2#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 72V input), and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, adjustable fault timing via TMR capacitor, and auto-retry fault behavior. Used in 12V/24V automotive power rails with 1A output capability.
For engineers reviewing the LTC4380CDD-2#PBF datasheet, LTC4380CDD-2#PBF pinout, LTC4380CDD-2#PBF application, or LTC4380CDD-2#PBF equivalent, key selection criteria include its 8µA operating current, 31.5V/50V selectable gate clamp, auto-retry latchoff mode, –60V reverse input tolerance, and DFN (3mm × 3mm) package compatibility with AEC-Q100-compliant designs.
Technical Context
The LTC4380CDD-2#PBF implements a multiplier-based fault timer where TMR pin current scales with both MOSFET VDS (via DRN pin) and ID (via SNS–OUT voltage), enabling dynamic SOA protection. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V during normal operation, while clamping GATE to 31.5V (SEL = GND) or 50V (SEL = VCC) during overvoltage.
It integrates undervoltage detection on the ON pin (1.05V threshold), open-drain FLT output for fault signaling, and supports reverse input protection to –60V. The device operates across 4V–72V input range, delivers 8µA quiescent current, and enters 6µA shutdown when ON < 0.99V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports 12V/24V/28V automotive systems without external regulation |
| Quiescent Current | 8µA 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 at ~27V or ~45V respectively |
| Fault Behavior | Auto-retry with cool-down period - automatically recovers after fault clears, no manual reset required |
| Reverse Input Rating | –60V - protects against reverse battery connection without external diode |
| Current Limit Threshold | 50mV (rising), 62mV (severe short) - sets precise, temperature-stable current limit via sense resistor |
| Package | 10-lead (3mm × 3mm) DFN - compact footprint with exposed pad for thermal management |
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 | Primary return path for all internal circuits; exposed pad must be connected to system GND for thermal and electrical integrity |
| VCC | Positive supply input | Accepts 4V–72V input; withstands –60V reverse; requires external Zener or RC filter if >80V transients expected |
| OUT | Output voltage sense | Senses load-side voltage; internal clamp limits GATE–OUT to 17V; requires ≥22µF local bypass |
| SNS | Current sense input | Monitors voltage drop across external sense resistor; controls GATE to maintain ΔVSNS = 50mV/62mV |
| DRN | MOSFET drain-source sense | Tracks OUT; generates current proportional to VDS for multiplier-based fault timing |
| GATE | N-MOSFET gate driver | Drives external MOSFET gate; regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) |
| ON | Enable/UV detect input | Turns device on above 1.05V; shuts down to 6µA below 0.99V; supports undervoltage lockout |
| SEL | Gate clamp select | GND = 31.5V clamp; VCC/OUT = 50V clamp - determines output overvoltage clamp level |
| TMR | Fault timer integrator | Capacitor-connected node; charges with MOSFET stress-proportional current; triggers FLT at 1.215V |
| FLT | Open-drain fault indicator | Pulls low during overvoltage/overcurrent fault; sinks up to 3mA; signals need for system-level response |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | Enables autonomous system recovery after transient overvoltage or overload without host intervention |
| Multiplier-based MOSFET stress timer | Adjusts fault timeout dynamically based on real-time VDS × ID, preserving MOSFET SOA under varying fault severity |
| Selectable 31.5V/50V gate clamp | Allows single BOM to support both 12V (27V clamp) and 24V/28V (45V clamp) automotive platforms |
| –60V reverse input tolerance | Eliminates need for external reverse-polarity protection diode, reducing voltage drop and heat dissipation |
| 8µA operating quiescent current | Extends battery life in always-on vehicle modules (e.g., telematics, alarm systems) without compromising protection |
Applications
| Automotive Load Dump Protection | Always-On Battery-Powered Systems |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS ECUs from 12V system load dump transients (up to 250V peak). IC Role / Device Role / Timing Role: Surge stopper controlling high-side N-MOSFET to clamp output at 27V during 12V system surges. Use Value: Prevents damage to downstream 3.3V/5V regulators and microcontrollers without requiring oversized input capacitors or TVS diodes. | Use Scenario: Powering GPS trackers and remote keyless entry receivers in parked vehicles with multi-year battery life. IC Role / Device Role / Timing Role: Low-IQ high-side switch enabling controlled startup and reverse polarity protection. Use Value: 8µA quiescent current minimizes parasitic drain; auto-retry ensures recovery from intermittent shorts without waking host MCU. |
| Hot-Swap Power Insertion | Industrial 24V DC Power Distribution |
Use Scenario: Safely inserting powered modules into live 24V backplanes in factory automation controllers. IC Role / Device Role / Timing Role: Inrush-limited high-side switch with programmable current limit and fault timing. Use Value: Limits inrush to safe levels via GATE ramp control; prevents bus voltage sag and contact arcing during insertion. | Use Scenario: Protecting PLC I/O modules and sensors from 24V rail surges caused by inductive load switching. IC Role / Device Role / Timing Role: Overvoltage protector using 50V gate clamp (SEL = VCC) to limit output to ~45V during transients. Use Value: Maintains uninterrupted operation during 24V system spikes; eliminates need for discrete Zener+MOSFET solutions. |
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#PBF | Same functionality and specs; MSOP-10 package instead of DFN-10 | Preferred where hand-soldering or legacy PCB layout requires larger pitch and easier rework | Select for prototyping, low-volume industrial boards, or where thermal requirements allow higher θJA (160°C/W vs. 43°C/W) |
| LTC4380CDD-1#PBF | Identical DFN-10 package and temp grade (0°C to 70°C), but latches off on fault instead of auto-retry | Required where safety-critical systems mandate manual reset after overvoltage event | Choose when fault persistence must be enforced - e.g., medical or railway subsystems requiring operator acknowledgment |
Compared with LTC4380IMS-2#PBF, the LTC4380CDD-2#PBF offers superior thermal performance in space-constrained layouts; compared with LTC4380CDD-1#PBF, it provides autonomous recovery ideal for unattended automotive modules - eliminating need for external reset circuitry or firmware intervention.
Availability
LTC4380CDD-2#PBF is available at Aetrix Electronics and suitable for automotive load dump protection, always-on battery-powered systems, and industrial 24V DC power distribution requiring stable component supply and long-term lifecycle support.
Supply support for LTC4380CDD-2#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 robust, low-IQ surge protection ICs designed specifically for automotive-grade power rail hardening - emphasizing AEC-Q100 qualification, wide input range, and intelligent MOSFET stress management.
FAQ
What is the gate clamp voltage configuration for LTC4380CDD-2#PBF?
The LTC4380CDD-2#PBF supports two fixed internal gate clamp voltages: 31.5V when the SEL pin is tied to GND (for 12V systems), and 50V when SEL is tied to VCC or OUT (for 24V/28V systems). This directly determines the output overvoltage clamp level - approximately 27V or 45V respectively - and is confirmed in the LTC4380 Rev. C datasheet Table 1 and Pin Functions section.
Does LTC4380CDD-2#PBF support reverse battery protection?
Yes, LTC4380CDD-2#PBF supports reverse input protection to –60V on the VCC pin, enabling direct connection to automotive battery terminals without external Schottky diodes. This is specified in Absolute Maximum Ratings and verified in the Reverse Current vs Reverse Voltage plot (Fig. G08) of the LTC4380 Rev. C datasheet.
How does the fault timer in LTC4380CDD-2#PBF respond to different fault conditions?
The LTC4380CDD-2#PBF fault timer uses a multiplier architecture: TMR pin current scales with both MOSFET VDS (via DRN) and ID (via SNS–OUT), causing faster turn-off under high-power faults. Upon reaching 1.215V, it enters cool-down mode and auto-restarts - unlike latchoff versions. This behavior is explicitly defined for LTC4380-2 variants in the OPERATION section of the Rev. C datasheet.
What is the quiescent current of LTC4380CDD-2#PBF and how is it measured?
The LTC4380CDD-2#PBF has a typical operating quiescent current of 8µA at 25°C, measured as total supply current into VCC, OUT, SNS, and DRN pins under normal operation (VCC = OUT = SNS = DRN = 12V). In shutdown (ON < 0.99V), it drops to 6µA - values confirmed in Electrical Characteristics Table on page 4 of the Rev. C datasheet.
Can LTC4380CDD-2#PBF drive back-to-back MOSFETs for reverse polarity protection?
Yes, the GATE pin of LTC4380CDD-2#PBF can drive back-to-back N-channel MOSFETs to implement bidirectional reverse input protection, eliminating the forward voltage drop and power loss of Schottky diodes. This capability is explicitly stated in the FEATURES section and PIN FUNCTIONS description for the GATE pin in the Rev. C datasheet.
LTC4380CDD-2#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-2#PBF FAQ
1.How can I place an order for LTC4380CDD-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380CDD-2#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-2#PBF reliable?
The price and inventory of LTC4380CDD-2#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-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC4380CDD-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380CDD-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380CDD-2#PBF?
LTC4380CDD-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380CDD-2#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-2#PBF?
For technical support, including LTC4380CDD-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380CDD-2#PBF requirements.
6.How does Aetrix verify that LTC4380CDD-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4380CDD-2#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-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC4380CDD-2#PBF?
All LTC4380CDD-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380CDD-2#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-2#PBF part is unused and in its original packaging.
Return procedure for LTC4380CDD-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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