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Analog Devices Inc. LTC4380CDD-2#TRPBF
- Part No.:
- LTC4380CDD-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC4380CDD-2#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,778
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Product details
Overview
LTC4380CDD-2#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 auto-retry fault behavior. Used in 12V/24V automotive power rails where sustained surge protection and battery-backed operation are required.
For engineers reviewing the LTC4380CDD-2#TRPBF datasheet, LTC4380CDD-2#TRPBF pinout, LTC4380CDD-2#TRPBF application, or LTC4380CDD-2#TRPBF equivalent, key selection criteria include gate clamp voltage configuration (SEL = GND → 31.5V), auto-retry vs latch-off behavior, MOSFET stress acceleration via TMR-based multiplier, reverse input protection to –60V, and DFN (3mm × 3mm) package compatibility with high-density PCB layouts.
Technical Context
The LTC4380CDD-2#TRPBF implements a VDS–ID multiplier architecture on the TMR pin to dynamically scale fault timer current based on MOSFET power dissipation-enabling shorter turn-off times under severe stress while tolerating benign transients. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V, with dual clamping: 31.5V/50V to GND (SEL-selectable) and 13.5V above VCC.
It integrates undervoltage detection on the ON pin (1.05V threshold, 45mV hysteresis), open-drain FLT output for fault signaling, and reverse-input protection down to –60V. The device operates across 4V–72V input range, supports back-to-back MOSFET configurations for bidirectional blocking, and delivers 8µA quiescent current in active mode and 6µA in shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports 12V/24V/28V automotive systems and industrial supplies without external regulators. |
| Quiescent Current | 8µA typical - enables always-on battery-powered applications with multi-year standby life. |
| Gate Clamp Voltage | 31.5V (SEL = GND) or 50V (SEL = VCC) - sets output clamp at ~27V or ~45V respectively, matching 12V/24V system safety margins. |
| Fault Behavior | Auto-retry (LTC4380-2 variant) - enters cool-down phase after fault, then automatically restarts without manual reset. |
| Current Limit Threshold | 50mV (OUT > 3V) rising to 62mV (OUT < 1.5V) - provides graded overcurrent response to avoid nuisance tripping during inrush. |
| Reverse Input Protection | –60V - withstands reverse battery connection without damage or latch-up. |
| Package | 10-lead DFN (3mm × 3mm) - thermally enhanced surface-mount footprint with exposed pad for efficient heat dissipation. |
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 path for all internal circuits; exposed pad must be connected to system GND for thermal and electrical integrity. |
| VCC | Main supply input | Accepts 4V–72V input; survives –60V reverse bias; requires RC filter or Zener clamp for >80V transients. |
| OUT | Output voltage sense | Senses post-MOSFET output; bypassed with ≥22µF capacitor; internal clamp limits GATE–OUT to 17V. |
| SNS | Current sense input | Connects to high-side of sense resistor; regulates ΔVSNS to 50mV/62mV; limited to ±5V differential. |
| DRN | MOSFET drain-source sense | Tracks OUT; current through RDRN ∝ VDS; used with SNS to compute MOSFET power for adaptive timing. |
| GATE | N-MOSFET gate driver | Drives external MOSFET gate; regulated to VOUT + 11.5V; clamped to 31.5V/50V (SEL-dependent) or VCC + 13.5V. |
| ON | Enable/UVLO/shutdown control | 1.05V threshold; internal 1MΩ pull-up; pulls low to enter 6µA shutdown; tolerant to –60V to +80V. |
| SEL | Gate clamp voltage select | GND = 31.5V clamp; VCC/OUT = 50V clamp - determines output overvoltage limit for 12V vs 24V systems. |
| FLT | Fault status output | Open-drain logic-low signal during fault; sinks up to 3mA; indicates MOSFET is off due to OV/OC condition. |
| TMR | Fault timer integration node | Capacitor-connected pin; current scales with MOSFET stress; 1.215V threshold triggers shutdown and cool-down. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry fault recovery | Enables autonomous system recovery after overvoltage/overcurrent events without host intervention or power cycle. |
| Adaptive MOSFET stress timing | TMR current scales with VDS × ID product, shortening fault timeout under high-power faults to preserve MOSFET SOA. |
| Back-to-back MOSFET support | GATE drive capability allows reverse-input protection without Schottky diode voltage drop or thermal loss. |
| Selectable 31.5V/50V gate clamp | Hardware-configurable clamp matches 12V (27V output limit) or 24V/28V (45V output limit) automotive architectures. |
| –60V reverse input tolerance | Eliminates need for external reverse-polarity protection circuitry in battery-connected applications. |
Applications
| Automotive Load Dump Protection | Always-On Telematics Power Rail |
|---|---|
Use Scenario: Protecting infotainment ECUs and telematics modules from 12V vehicle battery surges up to 250Vpk during alternator load dump. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET; clamps output to 27V using 31.5V gate clamp (SEL = GND); auto-retry ensures uninterrupted operation after transient clearance. Use Value: Prevents damage to downstream 3.3V/5V DC-DC converters and microcontrollers while maintaining system uptime without manual reset. |
Use Scenario: Powering GPS/GSM modules in parked vehicle mode with ultra-low standby consumption. IC Role / Device Role / Timing Role: Always-on input protector with 8µA quiescent current; ON pin monitors battery UVLO; reverse-input protection blocks –60V jump-start attempts. Use Value: Extends battery life beyond 5 years in maintenance-free telematics deployments without sacrificing surge resilience. |
| Industrial 24V Fieldbus Interface | High-Side Battery Switch for Portable Test Equipment |
Use Scenario: Securing RS-485/PROFIBUS nodes against induced surges on long cable runs in factory automation. IC Role / Device Role / Timing Role: Controls high-current N-MOSFET with 50V gate clamp (SEL = VCC); TMR-based timing rejects EFT bursts while responding to sustained overvoltage. Use Value: Eliminates need for TVS arrays and fuses, reducing BOM count and board area while meeting IEC 61000-4-4/5 immunity requirements. |
Use Scenario: Enabling/disabling main battery power to portable oscilloscopes and multimeters with zero forward voltage drop. IC Role / Device Role / Timing Role: High-side switch using back-to-back MOSFETs; GATE drive eliminates Schottky conduction loss; ON pin serves as hardware enable. Use Value: Achieves <1mV dropout and <1µA leakage in OFF state, preserving battery charge during storage without mechanical switch wear. |
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#TRPBF | Same functionality and pinout, but in MSOP-10 package (5.0mm × 4.4mm); higher θJA (160°C/W) vs DFN's 43°C/W. | Better suited for prototyping or low-volume designs where hand-soldering or socketing is preferred over DFN reflow. | Select when thermal constraints allow larger footprint or when legacy MSOP layout reuse is prioritized over size/power density. |
| LTC4380CDD-1#TRPBF | Identical DFN package and specs, but latches off after fault instead of auto-retrying; requires ON pin pulse or power cycle to recover. | Preferred in safety-critical systems where unattended restart after fault is prohibited (e.g., brake control modules). | Choose only if deterministic manual/firmware-controlled reset is mandated by system safety architecture. |
Compared with LTC4380IMS-2#TRPBF, the LTC4380CDD-2#TRPBF offers superior thermal performance and smaller footprint for space-constrained automotive modules; compared with LTC4380CDD-1#TRPBF, it provides autonomous recovery essential for telematics and infotainment systems requiring continuous uptime.
Availability
LTC4380CDD-2#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, always-on telematics power rails, and industrial 24V fieldbus interfaces requiring stable component supply across production lifecycles.
Supply support for LTC4380CDD-2#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 family is designed specifically for robust input surge protection in harsh environments-targeting automotive, avionic, and industrial applications where reliability under voltage transients and ultra-low quiescent current are mandatory.
FAQ
What is the gate clamp voltage configuration for LTC4380CDD-2#TRPBF?
The LTC4380CDD-2#TRPBF supports two fixed 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 limit-approximately 27V or 45V respectively-based on the external MOSFET's threshold voltage. The LTC4380CDD-2#TRPBF does not support adjustable clamping; that function is reserved for LTC4380-3/-4 variants.
How does LTC4380CDD-2#TRPBF differ from LTC4380CDD-1#TRPBF?
The LTC4380CDD-2#TRPBF implements auto-retry fault behavior: after overvoltage or overcurrent shutdown, it enters a cool-down period and automatically restarts once the TMR capacitor discharges to 100mV. In contrast, the LTC4380CDD-1#TRPBF latches off permanently until the ON pin is pulsed low for ≥100µs or power is cycled. Both share identical pinout, package, and electrical specs except for this fault recovery mode.
What is the maximum reverse input voltage the LTC4380CDD-2#TRPBF can withstand?
The LTC4380CDD-2#TRPBF is rated for –60V reverse input voltage on the VCC pin, verified per Absolute Maximum Ratings. This allows direct connection to automotive batteries without external reverse-polarity protection diodes or MOSFETs. Operation remains functional down to –60V with no latch-up or permanent damage, provided ON and SEL pins are also biased within their –60V to +80V tolerance range.
Can LTC4380CDD-2#TRPBF drive back-to-back N-channel MOSFETs for reverse polarity protection?
Yes, the LTC4380CDD-2#TRPBF's GATE driver supports back-to-back N-MOSFET configurations. By driving both gates referenced to their respective sources, it enables true bidirectional blocking-eliminating the 0.3V–0.5V forward drop and thermal loss of Schottky diodes. This configuration is explicitly validated in the datasheet and requires no additional components beyond the dual MOSFETs and sense resistors.
What is the recommended TMR capacitor value for standard automotive load dump protection with LTC4380CDD-2#TRPBF?
A 8.2µF X7R ceramic capacitor rated for ≥10V is recommended for CTMR in 12V automotive load dump applications (e.g., Figure 1 in datasheet), delivering ~100ms fault timeout and corresponding cool-down/restart timing. This value balances ride-through of ISO 7637-2 Pulse 5a transients with safe MOSFET SOA enforcement. Larger values extend timeout; smaller values increase sensitivity but risk nuisance tripping during fast transients.
LTC4380CDD-2#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-2#TRPBF FAQ
1.How can I place an order for LTC4380CDD-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380CDD-2#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-2#TRPBF reliable?
The price and inventory of LTC4380CDD-2#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-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380CDD-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380CDD-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380CDD-2#TRPBF?
LTC4380CDD-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380CDD-2#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-2#TRPBF?
For technical support, including LTC4380CDD-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380CDD-2#TRPBF requirements.
6.How does Aetrix verify that LTC4380CDD-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380CDD-2#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-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380CDD-2#TRPBF?
All LTC4380CDD-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380CDD-2#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-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380CDD-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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