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Analog Devices Inc. LTC4380CMS-1#PBF
- Part No.:
- LTC4380CMS-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380CMS-1#PBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,452
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Product details
Overview
LTC4380CMS-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 polarity, and overcurrent events. It features 8µA operating current, 4V–72V input range, fixed 31.5V/50V gate clamp selection via SEL pin, and latched fault behavior. It is used in 12V automotive electronics where output clamping to ~27V during 250V transients is required.
For engineers reviewing the LTC4380CMS-1#PBF datasheet, LTC4380CMS-1#PBF pinout, LTC4380CMS-1#PBF application, or LTC4380CMS-1#PBF equivalent, key selection criteria include latchoff vs auto-retry behavior, gate clamp voltage selection (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 LTC4380CMS-1#PBF implements a VDS × ID multiplier on the TMR pin to dynamically shorten fault timeout based on MOSFET power dissipation-enabling SOA compliance during sustained overvoltage or overload. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V, while dual gate clamp options (31.5V or 50V referenced to GND) are selected by the SEL pin state.
It integrates undervoltage detection via the ON pin (1.05V threshold), open-drain FLT output signaling fault status, and reverse-input protection down to –60V. The device operates across 0°C to 70°C ambient and uses a 10-lead MSOP package with exposed pad grounded for thermal performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 8 µA typical at 25°C - enables always-on battery-powered operation without significant drain. |
| Input Voltage Range | 4 V to 72 V - supports 12V and 24V/28V automotive systems and industrial rails up to 72V. |
| Gate Clamp Options | 31.5 V or 50 V (SEL = GND or VCC) - sets output clamping at ~27V or ~45V respectively for 12V/24V system compatibility. |
| Fault Behavior | Latchoff (non-retry) - requires ON pin pulse <100 µs or power cycle to reset after overvoltage/overcurrent shutdown. |
| Reverse Input Protection | –60 V - withstands reverse battery connection without damage, eliminating need for external series diode. |
| Current Limit Threshold | 50 mV (rising), 62 mV (severe short, OUT < 1.5 V) - sets precise, temperature-stable current limit via external sense resistor. |
| Operating Temperature | 0°C to 70°C - commercial-grade rating suitable for under-hood and cabin electronics with controlled thermal environment. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 0.5mm pitch), exposed pad connected to GND for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary ground return for all internal circuits and exposed pad; must be low-impedance connection. |
| VCC | Positive Supply Input | Accepts 4V–72V input; withstands –60V reverse; powers internal circuitry and charge pump. |
| OUT | Output Voltage Sense | Senses regulated output node; bypassed with ≥22µF capacitor; internal clamp limits GATE–OUT to 17V. |
| SNS | Current Sense Input | Monitors voltage drop across external sense resistor (SNS–OUT); sets 50mV/62mV current limit threshold. |
| DRN | MOSFET Drain–Source Sense | Tracks VDS via external RDRN; generates proportional current into TMR for MOSFET stress acceleration. |
| GATE | N-Channel 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; pull >1.05V to enable, <0.99V to shut down (reducing IQ to 6µA); supports undervoltage lockout. |
| SEL | Gate Clamp Voltage Select | Ground = 31.5V clamp; connect to VCC/OUT = 50V clamp - only active in LTC4380-1/LTC4380-2 variants. |
| FLT | Fault Status Output | Open-drain logic-low signal when faulted; sinks up to 3mA; indicates latched-off state until reset. |
| TMR | Fault Timer Integration Node | Connects to timing capacitor CTMR; current scales with MOSFET VDS × ID; triggers shutdown at 1.215V. |
Key Features
| Feature | Design Value |
|---|---|
| Low 8µA Operating Quiescent Current | Enables direct connection to vehicle battery in always-on modules (e.g., telematics, alarm systems) without excessive standby drain. |
| Adjustable Fault Timing with MOSFET Stress Acceleration | TMR current scales with VDS × ID, reducing timeout during high-power faults - keeps MOSFET within SOA without manual derating. |
| Reverse Input Protection to –60V | Eliminates need for external Schottky or MOSFET-based reverse-polarity protection, reducing BOM count and forward voltage drop. |
| Fixed Dual Gate Clamp (31.5V/50V) | Provides system-level output clamping at ~27V (12V systems) or ~45V (24V/28V systems) without external Zener networks. |
| Latchoff Fault Response | Prevents uncontrolled cycling during persistent faults (e.g., sustained load dump), enhancing system safety and diagnostics. |
| AEC-Q100 Qualified (MSOP Grade) | Validated for automotive use per stress test requirements - supports deployment in infotainment, body control, and ADAS subsystems. |
Applications
| Automotive Load Dump Protection | Always-On Battery-Powered Module |
|---|---|
Use Scenario: Protecting infotainment head unit from 12V vehicle battery surges up to 250V during alternator load dump. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET to clamp output at 27V and limit MOSFET stress via TMR-based fault timer. Use Value: Prevents downstream DC/DC converter and MCU damage while maintaining >99% uptime during transient events. |
Use Scenario: Power management for GPS tracker module powered directly from car battery with ignition-off monitoring. IC Role / Device Role / Timing Role: Low-IQ (8µA) enable controller with reverse polarity protection and latchoff fault response for safe long-term standby. Use Value: Extends battery life beyond 3 years in parked-vehicle tracking without requiring mechanical disconnect switches. |
| Industrial 24V Rail Surge Suppression | Hot-Swap Power Entry for Rack Systems |
Use Scenario: Securing PLC I/O module against 24V supply transients caused by inductive load switching or lightning-induced surges. IC Role / Device Role / Timing Role: Gate-clamped (50V) surge stopper limiting output to ~45V and enforcing current limit via SNS–OUT sensing. Use Value: Eliminates need for TVS diodes and fuses at board entry, simplifying layout and improving reliability under repetitive surges. |
Use Scenario: Controlled power-up of blade server in telecom rack during live insertion, preventing bus disturbance and inrush spikes. IC Role / Device Role / Timing Role: Soft-start enabled by GATE ramp control and programmable TMR delay, with ON pin as hot-swap enable signal. Use Value: Limits inrush to <1A during insertion while providing reverse polarity and overcurrent lockout for system integrity. |
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 functionality and pinout; rated for –40°C to 85°C industrial temperature range. | Required for under-hood or wide-temperature industrial deployments where 0°C–70°C is insufficient. | Select when extended ambient operation is needed; otherwise LTC4380CMS-1#PBF suffices for cabin or controlled environments. |
| LTC4380CMS-2#PBF | Identical package and pinout; differs only in fault behavior - auto-retry instead of latchoff. | Suitable for non-safety-critical systems where automatic recovery after transient fault is preferred over manual reset. | Choose LTC4380CMS-2#PBF only if system firmware can handle repeated fault cycles; LTC4380CMS-1#PBF provides deterministic lockout. |
Compared with LTC4380IMS-1#PBF and LTC4380CMS-2#PBF, the LTC4380CMS-1#PBF offers optimal balance of cost, temperature margin, and fail-safe latchoff behavior for commercial automotive cabin electronics - avoiding unnecessary thermal derating or uncontrolled restarts.
Availability
LTC4380CMS-1#PBF is available at Aetrix Electronics and suitable for automotive infotainment, telematics, and industrial 24V power entry applications requiring stable component supply, AEC-Q100 compliance, and low-quiescent-current surge protection.
Supply support for LTC4380CMS-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 robust, low-IQ surge protection for automotive and industrial power rails - designed specifically to replace discrete protection solutions with integrated, MOSFET-driven clamping and intelligent fault timing.
FAQ
What is the gate clamp voltage configuration for LTC4380CMS-1#PBF?
The LTC4380CMS-1#PBF is the -1 variant, which provides fixed internal gate clamp voltages of 31.5V (SEL = GND) or 50V (SEL = VCC/OUT). This allows output clamping at ~27V or ~45V respectively, making it ideal for 12V and 24V/28V automotive systems. The LTC4380CMS-1#PBF does not support externally adjustable clamping - that function is reserved for -3/-4 variants.
Does LTC4380CMS-1#PBF support reverse battery protection?
Yes, the LTC4380CMS-1#PBF supports reverse input protection down to –60V on the VCC pin. This eliminates the need for an external series Schottky diode or reverse-MOSFET solution. When VCC is pulled to –60V with ON open or pulled low, the device remains undamaged and draws only leakage current - a key feature for automotive battery-connected modules.
How does the fault timer in LTC4380CMS-1#PBF respond to MOSFET stress?
The LTC4380CMS-1#PBF uses a TMR pin current proportional to both VDS (via DRN) and ID (via SNS–OUT), effectively implementing a VDS × ID multiplier. This causes the TMR capacitor to charge faster under higher MOSFET power dissipation - shortening fault timeout during severe conditions and keeping the external MOSFET within its Safe Operating Area without manual SOA derating.
What is the operating temperature range of LTC4380CMS-1#PBF?
The LTC4380CMS-1#PBF is specified for 0°C to 70°C ambient operating temperature - the "C" grade in the ordering matrix. It is packaged in a 10-lead MSOP with exposed pad, and its thermal resistance (θJA) is 160°C/W. This rating suits cabin-mounted automotive electronics and industrial control panels with moderate thermal environments.
Is LTC4380CMS-1#PBF pin-compatible with other LTC4380 variants?
Yes, all LTC4380 variants - including LTC4380CMS-1#PBF, LTC4380CMS-2#PBF, LTC4380IMS-1#PBF, and LTC4380HMS-1#PBF - share identical 10-pin MSOP pinouts and footprints. Differences lie solely in temperature grade, fault behavior (-1 vs -2), and gate clamp architecture (-1/-2 vs -3/-4); no PCB redesign is needed when upgrading to wider temperature or auto-retry versions.
LTC4380CMS-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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-MSOP
LTC4380CMS-1#PBF FAQ
1.How can I place an order for LTC4380CMS-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380CMS-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 LTC4380CMS-1#PBF reliable?
The price and inventory of LTC4380CMS-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 LTC4380CMS-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4380CMS-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380CMS-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380CMS-1#PBF?
LTC4380CMS-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380CMS-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 LTC4380CMS-1#PBF?
For technical support, including LTC4380CMS-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380CMS-1#PBF requirements.
6.How does Aetrix verify that LTC4380CMS-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4380CMS-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 LTC4380CMS-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4380CMS-1#PBF?
All LTC4380CMS-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380CMS-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 LTC4380CMS-1#PBF part is unused and in its original packaging.
Return procedure for LTC4380CMS-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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