My Inquiry
My Account
Analog Devices Inc. LTC4380HMS-4#WPBF
- Part No.:
- LTC4380HMS-4#WPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-4#WPBF.pdf
- Description:
- L Q C SURGE STOPPER
- Quantity:
- Payment:
- Shipping:
Inventory:1,528
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4380HMS-4#WPBF from Analog Devices is a low-quiescent-current (11 µA typ.) automotive-grade surge stopper IC that controls an external N-channel MOSFET to protect downstream loads from overvoltage (e.g., 12V/24V load dump) and overcurrent faults. It features adjustable gate clamp voltage, reverse input protection to –60V, and auto-retry fault behavior - designed for high-side switching in battery-powered automotive systems.
For engineers reviewing the LTC4380HMS-4#WPBF datasheet, LTC4380HMS-4#WPBF pinout, LTC4380HMS-4#WPBF application, or LTC4380HMS-4#WPBF equivalent, key selection considerations include its H-grade (–40°C to 125°C) AEC-Q100 qualification, MSOP-10 package, 4V–72V operating range, 50 mV current limit threshold, and TMR-based MOSFET stress acceleration timing.
Technical Context
The LTC4380HMS-4#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 SOA protection proportional to MOSFET power dissipation. Its internal 20 µA charge pump regulates GATE to VOUT + 11.5 V, while gate clamping is fully external - no internal clamp to GND - allowing flexible output voltage limiting via VCC Zener.
This variant (–4 suffix) supports auto-retry fault recovery with cool-down cycling and integrates undervoltage detection on the ON pin (1.05 V threshold, 45 mV hysteresis). It drives back-to-back MOSFETs for reverse polarity protection and operates with only 8–11 µA quiescent current - critical for always-on automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4 V to 72 V - supports 12 V, 24 V, and 28 V automotive systems with headroom for transients up to 250 Vpk. |
| Quiescent Current (IQ) | 11 µA typical at 25°C - enables use in always-on vehicle modules without excessive battery drain. |
| Current Limit Threshold | 50 mV (SNS–OUT), rising to 62 mV when OUT < 1.5 V - sets precise, temperature-stable load current limit via external sense resistor. |
| Fault Timer Threshold | 1.215 V on TMR pin - triggers MOSFET turn-off and FLT assertion when integrated MOSFET stress exceeds safe duration. |
| Reverse Input Protection | –60 V on VCC pin - withstands reverse battery connection without damage or latch-up. |
| Temperature Grade | H-grade (–40°C to +125°C ambient) - qualified per AEC-Q100 for under-hood automotive applications. |
| Fault Behavior | Auto-retry (–4 suffix) - enters controlled cool-down cycle after fault, then automatically restarts without external reset. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3 mm × 3 mm footprint, 0.5 mm pitch), exposed pad (GND), rated for 150°C junction temperature (θJA = 160°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary ground return; exposed pad must be connected to PCB ground plane for thermal and EMI performance. |
| VCC | Positive Supply Input | Accepts 4 V–72 V input; tolerates –60 V reverse; requires external Zener clamp for >80 V transients. |
| OUT | Output Voltage Sense | Senses load-side voltage; internal clamp limits GATE–OUT to 17 V; bypass with ≥22 µF ceramic capacitor. |
| SNS | Current Sense Input | Connects to high-side of sense resistor; monitors ΔVSNS to enforce 50 mV current limit; ±5 V absolute range. |
| DRN | MOSFET Drain–Source Monitor | Tracks VDS via external RDRN; generates current proportional to VDS for TMR multiplier function. |
| GATE | N-Channel MOSFET Gate Driver | Regulated to VOUT + 11.5 V; no internal GND clamp (–4 version); requires ≥47 nF + 33 Ω RC compensation. |
| ON | Enable / UVLO / Shutdown Control | 1.05 V turn-on threshold with 45 mV hysteresis; pulls <6 µA in shutdown; tolerant to –60 V to +80 V. |
| SEL | Gate Clamp Configuration | Not used in –4 version; must be tied to GND per datasheet; internal clamp disabled for external Zener control. |
| TMR | Fault Timer Integration Node | Capacitor-connected node; charges with MOSFET stress–proportional current; 1.215 V trip point initiates shutdown. |
| FLT | Open-Drain Fault Indicator | Pulls low during fault; sinks up to 3 mA; signals active fault condition to system controller or status LED. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable External Gate Clamp | Enables precise output voltage limiting (e.g., 27 V, 45 V, or custom values) using VCC Zener diode - no fixed internal clamp. |
| Auto-Retry Fault Recovery | After overvoltage or overcurrent fault, executes 15-cycle TMR cool-down (3.4 V ↔ 1.215 V) then self-restarts - eliminates manual reset in inaccessible locations. |
| Reverse Input Protection to –60 V | Allows direct connection to vehicle battery without external diode or protection circuitry - reduces BOM count and forward drop loss. |
| MOSFET Stress–Accelerated Timing | TMR current scales with VDS × ID, shortening fault timeout during high-power dissipation - keeps MOSFET within SOA during sustained surges. |
| AEC-Q100 Qualified H-Grade | Validated for –40°C to +125°C operation with full automotive reliability testing - suitable for engine control, ADAS, and body electronics. |
Applications
| Automotive Load Dump Protection | Always-On Telematics Module Power |
|---|---|
|
Use Scenario: Protecting infotainment and telematics ECUs from 12 V system load dump transients (up to 250 Vpk, 400 ms). IC Role / Device Role / Timing Role: High-side surge stopper controlling external N-MOSFET; clamps output to 27 V using 31.5 V gate clamp (SEL = GND) and regulates turn-on slew rate. Use Value: Prevents downstream DC/DC converter failure and avoids need for oversized input capacitors or TVS diodes at the load. |
Use Scenario: Powering GPS, cellular, and CAN modules in parked vehicle mode with minimal battery drain. IC Role / Device Role / Timing Role: Always-on high-side switch with 11 µA quiescent current; ON pin monitors battery UVLO and initiates graceful shutdown below 10.5 V. Use Value: Extends parked vehicle battery life beyond 30 days without recharge - meets OEM parasitic draw requirements. |
| Reverse Battery Protection System | Industrial 24 V Hot-Swap Controller |
|
Use Scenario: Safeguarding industrial control units against accidental reverse battery connection in field maintenance. IC Role / Device Role / Timing Role: Reverse-input-tolerant front-end controller; uses back-to-back MOSFET configuration driven by GATE/OUT pins to block reverse current. Use Value: Eliminates Schottky diode (0.3–0.5 V drop, 1–2 W loss) and associated heat sink - improves efficiency and simplifies thermal design. |
Use Scenario: Enabling live insertion of 24 V I/O modules into powered backplanes without bus disturbance. IC Role / Device Role / Timing Role: Controlled high-side switch with programmable inrush current limiting via TMR and SNS feedback loop. Use Value: Limits hot-swap inrush to <1 A peak using 20 mΩ sense resistor and 50 mV threshold - prevents supply rail sag and false resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4380HMS-2#WPBF | Fixed 31.5 V / 50 V internal gate clamp (SEL-selectable); same H-grade, auto-retry, MSOP-10 package. | Requires no external Zener for standard 12 V / 24 V clamp voltages; less design flexibility but simpler layout. | Select when standardized 27 V or 45 V output clamping suffices and Zener sourcing/layout overhead must be avoided. |
| LTC4380HDD-4#WPBF | Same electrical specs and –4 auto-retry functionality, but in 3 mm × 3 mm DFN package with exposed pad. | Offers lower thermal resistance (θJA = 43°C/W vs. 160°C/W) and smaller footprint - better for space-constrained or thermally demanding layouts. | Select when board area or thermal performance is prioritized over MSOP compatibility or hand-solderability. |
Compared with LTC4380HMS-2#WPBF, the LTC4380HMS-4#WPBF trades internal clamp simplicity for full external clamp flexibility, while versus LTC4380HDD-4#WPBF it sacrifices thermal performance for MSOP mechanical compatibility and ease of rework.
Availability
LTC4380HMS-4#WPBF is available at Aetrix Electronics and suitable for automotive load dump protection, always-on telematics power, and industrial 24 V hot-swap applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LTC4380HMS-4#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-IQ surge protection ICs for high-side N-MOSFET control - engineered specifically for automotive reliability, transient resilience, and seamless integration into battery-powered systems.
FAQ
What is the purpose of the SEL pin on the LTC4380HMS-4#WPBF?
The SEL pin is not functional in the LTC4380HMS-4#WPBF. As a –4 variant, this part has no internal gate clamp to ground, and SEL must be tied to GND per the datasheet. Gate voltage limiting is achieved exclusively via external Zener clamping on the VCC pin - enabling fully adjustable output clamping from ~18 V to 72 V.
How does the LTC4380HMS-4#WPBF achieve auto-retry behavior after a fault?
The LTC4380HMS-4#WPBF enters a defined cool-down sequence upon fault detection: the TMR pin cycles between 3.4 V and 1.215 V fifteen times, then discharges to 100 mV before automatically restarting the gate drive. This prevents thermal runaway and allows MOSFET cooling - no external reset signal or power cycle is required for recovery.
Can the LTC4380HMS-4#WPBF be used with a P-channel MOSFET?
No - the LTC4380HMS-4#WPBF is designed exclusively for N-channel MOSFETs configured as high-side switches. Its gate driver architecture (charge pump referenced to OUT, GATE–OUT regulation) and pin functions (DRN, SNS, OUT) assume N-MOSFET source-follower topology. P-MOSFET use is unsupported and electrically incompatible.
What is the maximum recommended value for the current sense resistor (RSNS) with the LTC4380HMS-4#WPBF?
Based on the 50 mV current limit threshold and worst-case 62 mV under severe short, RSNS should be sized so that ILOAD(MAX) × RSNS ≤ 50 mV at normal operation. For a 1 A maximum load, RSNS ≤ 50 mΩ; for 2 A, ≤ 25 mΩ. Lower values improve accuracy and reduce self-heating, and 20 mΩ is commonly used in reference designs for 1 A applications.
Is the LTC4380HMS-4#WPBF pin-compatible with other LTC4380 variants in the MSOP package?
Yes - all LTC4380 MSOP variants (e.g., LTC4380HMS-1#WPBF, LTC4380HMS-2#WPBF, LTC4380HMS-3#WPBF, LTC4380HMS-4#WPBF) share identical 10-pin MSOP pinouts and footprints. Functionality differs only in internal gate clamp presence (–1/–2 vs. –3/–4) and fault behavior (latchoff vs. auto-retry), not pin assignment or electrical interface.
LTC4380HMS-4#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-4#WPBF FAQ
1.How can I place an order for LTC4380HMS-4#WPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-4#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-4#WPBF reliable?
The price and inventory of LTC4380HMS-4#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-4#WPBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-4#WPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-4#WPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-4#WPBF?
LTC4380HMS-4#WPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-4#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-4#WPBF?
For technical support, including LTC4380HMS-4#WPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-4#WPBF requirements.
6.How does Aetrix verify that LTC4380HMS-4#WPBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-4#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-4#WPBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-4#WPBF?
All LTC4380HMS-4#WPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-4#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-4#WPBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-4#WPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4380HMS-4#WPBF Tags
-
TVS3300DRVR
Texas Instruments
-
TCPP01-M12
STMicroelectronics
-
TPD4S214YFFR
Texas Instruments
-
TPD6S300ARUKR
Texas Instruments
-
TBU-CA085-300-WH
Bourns Inc.
-
TBU-CA065-500-WH
Bourns Inc.
-
TBU-CA040-100-WH
Bourns Inc.
-
TBU-CA085-500-WH
Bourns Inc.
-
TBU-CA085-200-WH
Bourns Inc.
-
NX20P0408UKZ
NXP Semiconductors
-
TBU-CA085-100-WH
Bourns Inc.
-
TBU-CA050-300-WH
Bourns Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
