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Analog Devices Inc. LTC4380HMS-1#WPBF
- Part No.:
- LTC4380HMS-1#WPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-1#WPBF.pdf
- Description:
- L Q C SURGE STOPPER
- Quantity:
- Payment:
- Shipping:
Inventory:3,226
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Product details
Overview
LTC4380HMS-1#WPBF 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 250Vpk), and overcurrent events. It features fixed 31.5V/50V gate clamp selection via SEL pin, 8µA operating current, –40°C to 125°C operating range, and AEC-Q100 qualification for automotive use.
For engineers reviewing the LTC4380HMS-1#WPBF datasheet, LTC4380HMS-1#WPBF pinout, LTC4380HMS-1#WPBF application, or LTC4380HMS-1#WPBF equivalent, key selection criteria include gate clamp voltage configuration (31.5V vs 50V), latchoff fault behavior, reverse input protection to –60V, MOSFET stress-accelerated fault timing, and MSOP-10 package compatibility with high-temperature automotive PCB layouts.
Technical Context
The LTC4380HMS-1#WPBF 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 MOSFET safe operating area (SOA) protection. Its internal 20µA charge pump regulates GATE to VOUT + 11.5V during normal operation and clamps GATE to 31.5V (SEL = GND) or 50V (SEL = VCC) during overvoltage.
It uses an ON pin comparator with 1.05V threshold and 45mV hysteresis for undervoltage detection and shutdown control, reducing quiescent current to 6µA in shutdown. The FLT open-drain output asserts low at TMR = 1.215V and remains latched off until ON is pulsed low ≥100µs or power is cycled - confirming its -1 variant latchoff behavior per Table 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to 125°C - supports under-hood automotive environments without derating. |
| Quiescent Current | 8 µA typical - enables always-on battery-powered systems with minimal standby drain. |
| Gate Clamp Voltage | 31.5 V (SEL = GND) - limits output to ~27 V in 12 V automotive systems during load dump. |
| Reverse Input Rating | –60 V - protects against reverse battery connection without external diodes. |
| Fault Response | Latchoff (–1 variant) - requires ON pin pulse or power cycle to recover after overvoltage/overcurrent fault. |
| Current Limit Threshold | 50 mV (SNS–OUT) - sets precise load current limit via external sense resistor (e.g., 20 mΩ → 2.5 A). |
| Package | 10-Lead MSOP - surface-mount footprint with exposed pad for thermal management in compact modules. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm body, 0.5mm pitch), exposed pad (Pin 11) connected to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary return path for all internal circuits and exposed pad thermal conduction point. |
| VCC | Positive Supply Input | Accepts 4V–80V input; withstands –60V reverse; powers internal circuitry and charge pump. |
| GATE | N-Channel MOSFET Gate Driver | Drives external FET gate; regulated to VOUT + 11.5V; clamped to 31.5V (SEL = GND) during overvoltage. |
| SNS | Current Sense Input | Monitors voltage drop across external sense resistor; controls current limit at 50 mV (rising) / 62 mV (severe short). |
| OUT | Output Voltage Sense | Reference node for SNS and GATE regulation; bypassed with ≥22 µF capacitor for stability. |
| DRN | MOSFET Drain–Source Sense | Tracks VDS via external RDRN; feeds multiplier for MOSFET power-dissipation–based fault timing. |
| TMR | Fault Timer Integration Node | Capacitor-connected node; charges to 1.215 V to trigger latchoff; discharges to 100 mV for retry (not applicable to –1). |
| ON | Turn-On / UV Detect / Shutdown | 1.05 V threshold comparator; pulls low ≥100 µs to reset latched fault; enables undervoltage lockout. |
| FLT | Open-Drain Fault Indicator | Pulls low when TMR reaches 1.215 V; sinks up to 3 mA; signals active fault condition. |
| SEL | Gate Clamp Voltage Select | GND = 31.5 V clamp; VCC/OUT = 50 V clamp - configures output clamping level for 12 V or 24/28 V systems. |
Key Features
| Feature | Design Value |
|---|---|
| Low 8 µA operating current | Enables direct connection to vehicle battery without unacceptable parasitic drain in always-on modules. |
| 31.5 V / 50 V selectable gate clamp | Allows single BOM to support both 12 V and 24/28 V automotive platforms via SEL pin routing. |
| Latchoff fault response (–1 variant) | Prevents uncontrolled auto-retry during persistent faults - critical for safety-critical ECU power rails. |
| Reverse input protection to –60 V | Eliminates need for external reverse-polarity protection diode, reducing voltage drop and heat dissipation. |
| MOSFET stress-accelerated timing | Reduces fault timeout proportionally to VDS × ID, keeping external FET within SOA during severe transients. |
Applications
| Automotive Load Dump Protection | High-Side Battery Switch |
|---|---|
Use Scenario: Protecting infotainment head units and ADAS cameras from 12 V system load dump surges up to 250 V peak. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET as high-side switch; clamps output to 27 V using 31.5 V gate clamp (SEL = GND). Use Value: Prevents damage to downstream 3.3 V/5 V regulators and microcontrollers without requiring oversized TVS diodes or complex transient suppressors. | Use Scenario: Enabling/disabling power to telematics control units (TCUs) based on ignition state and CAN bus activity. IC Role / Device Role / Timing Role: High-side switch controller with programmable turn-on delay (5 ms typical) and undervoltage lockout (1.05 V ON threshold). Use Value: Ensures clean power sequencing and prevents brownout-induced MCU resets during engine cranking (input dips to 4 V). |
| Reverse Battery Protection | Industrial Power Sequencing |
Use Scenario: Safeguarding vehicle ECUs during service when battery terminals are accidentally reversed. IC Role / Device Role / Timing Role: Reverse input protector leveraging –60 V VCC rating and internal clamps - no external Schottky required. Use Value: Eliminates 0.3–0.5 V forward drop and associated heat generation of discrete diode solutions, improving efficiency and reliability. | Use Scenario: Controlling power-up sequence of multi-rail industrial sensors (e.g., 24 V analog front-end, 3.3 V digital core). IC Role / Device Role / Timing Role: Precision current-limited switch with 50 mV SNS–OUT threshold and adjustable RSNS for ±1% current accuracy. Use Value: Limits inrush current into large capacitive loads (e.g., 100 µF LDO inputs) to prevent supply sag and ensure deterministic startup timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380HDD-1#PBF | Same functionality and specs, but in 3 mm × 3 mm DFN package with exposed pad. | Superior thermal performance in space-constrained layouts; requires different PCB land pattern and reflow profile. | Select for higher power density designs where junction temperature must be minimized under continuous 1 A load. |
| LTC4380HMS-2#WPBF | Identical MSOP-10 package and temp grade, but auto-retry (–2) fault behavior instead of latchoff. | Re-enables output automatically after cool-down; unsuitable for safety-critical latched-fault requirements. | Choose only when transient overloads are expected and manual reset is impractical - e.g., non-safety automotive accessories. |
Compared with LTC4380HMS-1#WPBF, the DFN variant offers better thermal resistance for sustained loads, while the –2 variant trades deterministic fault holdover for autonomous recovery - making LTC4380HMS-1#WPBF optimal for fail-safe automotive power domains requiring explicit operator or host-controller intervention after fault.
Availability
LTC4380HMS-1#WPBF is available at Aetrix Electronics and suitable for automotive load dump protection, reverse battery protection, and high-side battery switching applications requiring stable component supply across extended temperature ranges and AEC-Q100-compliant traceability.
Supply support for LTC4380HMS-1#WPBF 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-quiescent-current surge protection for automotive and harsh-environment power systems, specifically engineered to replace discrete protection circuits with integrated, AEC-Q100-qualified ICs.
FAQ
What is the gate clamp voltage configuration for LTC4380HMS-1#WPBF?
The LTC4380HMS-1#WPBF is the –1 variant with internal fixed gate clamp voltages: 31.5 V when SEL is tied to GND (for 12 V systems), or 50 V when SEL is tied to VCC/OUT (for 24/28 V systems). This is confirmed in the ORDER INFORMATION table and PIN FUNCTIONS section of the datasheet Rev. C.
Does LTC4380HMS-1#WPBF support auto-retry after a fault?
No. LTC4380HMS-1#WPBF implements latchoff fault behavior per Table 1. After TMR reaches 1.215 V, the MOSFET remains off until the ON pin is pulled low for ≥100 µs or power is cycled. Auto-retry is exclusive to –2 and –4 variants like LTC4380HMS-2#WPBF.
What is the maximum reverse input voltage rating for LTC4380HMS-1#WPBF?
LTC4380HMS-1#WPBF supports –60 V on the VCC pin with ON open and SEL = 0 V, as specified in Absolute Maximum Ratings. This enables robust reverse battery protection without external components, verified in the "Reverse Current vs Reverse Voltage" plot (Fig. G08) and PIN FUNCTIONS description.
How does the fault timer in LTC4380HMS-1#WPBF respond to MOSFET stress?
The LTC4380HMS-1#WPBF uses an internal multiplier that generates TMR pin current proportional to both VDS (via DRN) and ID (via ΔVSNS). Higher MOSFET power dissipation accelerates TMR charging, shortening fault timeout - directly protecting the external FET's safe operating area as documented in the OPERATION and PIN FUNCTIONS sections.
Is LTC4380HMS-1#WPBF qualified for automotive applications?
Yes. LTC4380HMS-1#WPBF carries the #WPBF suffix indicating controlled manufacturing for automotive use and is explicitly listed as AEC-Q100 qualified in the FEATURES section and ORDER INFORMATION table. Its H-grade (–40°C to 125°C) and MSOP package meet automotive under-hood requirements.
LTC4380HMS-1#WPBF 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:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC4380HMS-1#WPBF FAQ
1.How can I place an order for LTC4380HMS-1#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-1#WPBF 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-1#WPBF reliable?
The price and inventory of LTC4380HMS-1#WPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4380HMS-1#WPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-1#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-1#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-1#WPBF?
LTC4380HMS-1#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-1#WPBF 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-1#WPBF?
For technical support, including LTC4380HMS-1#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-1#WPBF requirements.
6.How does Aetrix verify that LTC4380HMS-1#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-1#WPBF 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-1#WPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-1#WPBF?
All LTC4380HMS-1#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-1#WPBF, 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-1#WPBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-1#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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