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Analog Devices Inc. LTC4380HMS-3#TRPBF
- Part No.:
- LTC4380HMS-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-3#TRPBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LTC4380HMS-3#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, reverse input, and overcurrent events. It operates from 4V to 72V input, delivers 8µA operating current, features adjustable gate clamp voltage (via external Zener), and supports –40°C to 125°C ambient for under-hood automotive applications.
For engineers reviewing the LTC4380HMS-3#TRPBF datasheet, LTC4380HMS-3#TRPBF pinout, LTC4380HMS-3#TRPBF application, or LTC4380HMS-3#TRPBF equivalent, key selection criteria include its adjustable overvoltage clamping architecture, MOSFET stress-accelerated fault timer, reverse input protection to –60V, latchoff fault behavior, and MSOP-10 package compatibility with AEC-Q100–qualified designs.
Technical Context
The LTC4380HMS-3#TRPBF implements a multiplier-based fault timer where TMR pin current scales with both VDS (via DRN pin) and ID (via SNS–OUT differential), enabling dynamic SOA protection proportional to MOSFET power dissipation. Its GATE driver regulates to VOUT + 11.5V and lacks internal gate-to-GND clamp - requiring external Zener at VCC to set output clamp voltage between 18V and 86V.
It uses an ON pin comparator with 1.05V threshold and 45mV hysteresis for undervoltage detection and shutdown control, reducing quiescent current to 6µA. Fault response is latchoff (non-auto-retry), requiring ON pin pulse <100µs or power cycle to reset after TMR reaches 1.215V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports 12V/24V/28V automotive systems and industrial rails without external regulation |
| Quiescent Current | 8µA typical - enables always-on battery-powered operation with minimal standby drain |
| Fault Timer Threshold | 1.215V on TMR pin - triggers MOSFET turn-off and FLT assertion when integrated MOSFET stress exceeds safe duration |
| Current Limit Threshold | 50mV (rising), 62mV (severe short) - sets precise load current limit via external sense resistor RSNS |
| Reverse Input Rating | –60V - withstands reverse battery connection without damage or latch-up |
| Temperature Grade | H-grade (–40°C to +125°C) - qualified for engine compartment and industrial high-temp environments |
| Package | 10-Lead MSOP - surface-mount footprint with exposed pad for thermal management in space-constrained PCBs |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm body, 0.5mm pitch), exposed pad (Pin 11) connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRN | VDS sense input | Tracks OUT; generates current proportional to MOSFET drain-source voltage for fault timing acceleration |
| VCC | Positive supply input | Accepts 4V–72V; tolerates –60V reverse; requires external Zener clamp for adjustable gate voltage setting |
| GATE | N-MOSFET gate driver | Regulated to VOUT + 11.5V; no internal GND clamp - output clamp defined by external VCC Zener |
| SNS | Current sense input | Monitors voltage across external sense resistor; controls gate to maintain ΔVSNS = 50mV/62mV |
| OUT | Output voltage sense | References SNS and GATE; bypassed with ≥22µF capacitor; internal clamp limits GATE–OUT to 17V |
| ON | Enable/shutdown input | 1.05V threshold; pulls device into 6µA shutdown when <0.99V; open-circuit default enables operation |
| FLT | Open-drain fault indicator | Pulls low when TMR reaches 1.215V; signals latched-off state; sinks up to 3mA |
| SEL | Clamp select (not used) | Must be tied to GND for LTC4380-3 variants - disables internal clamp logic; no functional role |
| TMR | Fault timer integrator | Capacitor-connected node; charges with MOSFET-stress-proportional current; 1.215V trip point |
| GND | Device ground reference | Return path for all internal circuits; exposed pad must be connected to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable overvoltage clamp | Enabled via external Zener on VCC - sets output clamp from 18V to 86V without changing IC or layout |
| MOSFET stress-accelerated timing | TMR current scales with VDS × ID, shortening fault timeout during high-power-dissipation events to protect SOA |
| Latchoff fault response | Stops switching permanently after fault - prevents uncontrolled retry cycles in persistent overvoltage/short conditions |
| Reverse input protection | Withstands –60V on VCC with no external diode - eliminates Schottky drop and heat in battery-reversal scenarios |
| Ultra-low quiescent current | 8µA operating / 6µA shutdown - extends battery life in always-on telematics, ADAS, and ECU modules |
Applications
| Automotive Load Dump Protection | Industrial Power Input Conditioning |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS cameras from 12V system load dump transients up to 250V peak. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET as high-side switch; clamps output to safe level using externally set gate voltage. Use Value: Prevents damage to downstream 27V-rated DC-DC converters and microcontrollers without derating or oversized TVS. | Use Scenario: Securing programmable logic controllers (PLCs) powered from unregulated 24V industrial supplies subject to line surges and polarity reversal. IC Role / Device Role / Timing Role: Reverse-input-tolerant front-end protector with latchoff fault behavior - ensures system remains safely off during sustained faults. Use Value: Eliminates need for series diode and parallel TVS, reducing BOM count and thermal footprint while meeting IEC 61000-4-5 Level 4. |
| High-Side Battery Switch for Telematics | Hot-Swap Power Sequencing in Ruggedized Edge Devices |
Use Scenario: Enabling controlled power-up of LTE modems and GNSS receivers in vehicle black boxes with 12V battery backup. IC Role / Device Role / Timing Role: Low-IQ high-side switch with programmable inrush control via GATE drive slew rate and current limit. Use Value: Limits inrush to <1A during cold cranking; maintains >10-year shelf life with 8µA standby draw. | Use Scenario: Inserting field-replaceable compute modules into powered backplanes in railway signaling cabinets. IC Role / Device Role / Timing Role: Latchoff surge stopper acting as hot-swap controller - blocks transients during insertion and holds off during miswiring. Use Value: Guarantees zero glitch to host FPGA during module insertion; avoids brownout resets caused by capacitive inrush. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380HMS-1#TRPBF | Fixed 31.5V/50V internal gate clamp; SEL pin active; same latchoff behavior | Predefined clamp voltages only - no external Zener required but less flexible for custom clamp targets | Select when 27V or 45V output clamping is sufficient and design simplicity is prioritized over adjustability |
| LTC4380HMS-4#TRPBF | Same adjustable gate clamp architecture but auto-retry (cool-down) fault behavior instead of latchoff | Re-enables output automatically after fault cooldown - suitable for non-critical loads needing uptime over safety | Select when transient overvoltage is expected and recovery without manual reset is required |
Compared with LTC4380HMS-1#TRPBF, LTC4380HMS-3#TRPBF trades fixed clamp simplicity for full external adjustability; compared with LTC4380HMS-4#TRPBF, it replaces auto-retry with safer latchoff behavior - making it optimal for mission-critical automotive and industrial systems where fault persistence must halt operation.
Availability
LTC4380HMS-3#TRPBF is available at Aetrix Electronics and suitable for automotive load dump protection, industrial power input conditioning, high-side battery switching, and hot-swap power sequencing requiring stable component supply across extended temperature ranges.
Supply support for LTC4380HMS-3#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 precision instrumentation, industrial automation, and automotive safety markets.
The LTC4380 product line delivers robust, low-IQ surge protection ICs designed specifically for automotive and harsh-environment power rail conditioning - emphasizing latchoff reliability, reverse-input tolerance, and MOSFET SOA-aware fault timing.
FAQ
What is the function of the SEL pin on the LTC4380HMS-3#TRPBF?
The SEL pin on the LTC4380HMS-3#TRPBF must be tied to GND to configure the device as an LTC4380-3 variant. Unlike -1/-2 versions, LTC4380HMS-3#TRPBF has no internal gate clamp - SEL is inactive and serves only as a hardware identifier. Leaving SEL floating or connecting it to VCC may cause undefined behavior or damage.
How does the LTC4380HMS-3#TRPBF achieve adjustable overvoltage clamping?
The LTC4380HMS-3#TRPBF achieves adjustable overvoltage clamping by regulating its GATE pin to VOUT + 11.5V and relying on external Zener clamping at the VCC pin. Since GATE voltage is referenced to VCC, clamping VCC defines the maximum GATE-to-GND voltage - and thus the output clamp level - across the full 18V–86V range.
Does the LTC4380HMS-3#TRPBF support auto-retry after a fault?
No, the LTC4380HMS-3#TRPBF implements latchoff fault behavior. Once the TMR pin reaches 1.215V and the MOSFET turns off, the device remains latched in the off state until the ON pin is pulled low for at least 100µs or power is cycled. This prevents uncontrolled restart attempts during persistent overvoltage or short-circuit conditions.
What is the maximum reverse input voltage the LTC4380HMS-3#TRPBF can withstand?
The LTC4380HMS-3#TRPBF is rated for –60V reverse input on the VCC pin. This allows direct connection to automotive battery inputs without external reverse-polarity protection diodes, eliminating forward voltage drop and associated power loss in always-on systems.
Can the LTC4380HMS-3#TRPBF drive back-to-back MOSFETs for reverse input protection?
Yes, the LTC4380HMS-3#TRPBF's GATE driver supports driving back-to-back N-channel MOSFETs. This configuration provides bidirectional blocking and eliminates the 0.3V–0.5V forward drop and thermal burden of Schottky diodes - critical for high-efficiency, low-IQ battery-powered applications.
LTC4380HMS-3#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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-MSOP
LTC4380HMS-3#TRPBF FAQ
1.How can I place an order for LTC4380HMS-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-3#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 LTC4380HMS-3#TRPBF reliable?
The price and inventory of LTC4380HMS-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4380HMS-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-3#TRPBF?
LTC4380HMS-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-3#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 LTC4380HMS-3#TRPBF?
For technical support, including LTC4380HMS-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-3#TRPBF requirements.
6.How does Aetrix verify that LTC4380HMS-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-3#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 LTC4380HMS-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-3#TRPBF?
All LTC4380HMS-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-3#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 LTC4380HMS-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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