My Inquiry
My Account
Analog Devices Inc. LTC4380HMS-3#PBF
- Part No.:
- LTC4380HMS-3#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4380HMS-3#PBF.pdf
- Description:
- IC LOW CUR SURGE STOPPER 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,404
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC4380HMS-3#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 operates from 4V to 72V input, delivers ≤8µA operating current, features adjustable gate clamp voltage (via external Zener), and supports latchoff fault behavior. It is used in high-reliability 12V/24V automotive power rails where sustained overvoltage must be blocked without battery drain.
For engineers reviewing the LTC4380HMS-3#PBF datasheet, LTC4380HMS-3#PBF pinout, LTC4380HMS-3#PBF application, or LTC4380HMS-3#PBF equivalent, key selection criteria include its –40°C to 125°C H-grade temperature rating, MSOP-10 package, adjustable overvoltage clamping architecture, MOSFET stress-accelerated fault timing, and reverse input protection to –60V - all critical for AEC-Q100-compliant vehicle subsystems.
Technical Context
The LTC4380HMS-3#PBF implements a multiplier-based fault timer that generates TMR pin current proportional to both VDS (via DRN pin) and ID (via SNS–OUT differential), enabling dynamic SOA protection. Its GATE driver regulates to VOUT + 11.5V with internal 13.5V VGATE–VVCC compliance but no fixed gate-to-GND clamp - requiring external Zener at VCC to set output clamping voltage.
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), triggered when TMR reaches 1.215V; recovery requires ON pin pulldown ≥100µs or power cycle - ensuring fail-safe behavior during persistent faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 72V input - supports full automotive battery range including cold-crank and load-dump transients. |
| Quiescent Current | 8µA typical at 25°C - enables always-on operation in battery-backed systems without significant drain. |
| Fault Threshold Voltage | 1.215V on TMR pin - precise, temperature-stable trip point for MOSFET turn-off under overvoltage/overcurrent stress. |
| Current Limit Sense | 50mV (rising), 62mV (severe short) - sets accurate, scalable load current limit via external sense resistor. |
| Reverse Input Protection | –60V on VCC pin - withstands reverse battery connection without damage or latch-up. |
| Temperature Grade | H-grade (–40°C to +125°C) - qualified for under-hood automotive environments per AEC-Q100. |
| Package | 10-Lead MSOP - surface-mount, thermally enhanced package compatible with standard reflow profiles. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm footprint, 1.1mm height). Exposed pad is GND and may be connected to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Device Ground Reference | Primary return path for internal circuitry and exposed pad; must be low-impedance for stable operation. |
| VCC | Positive Supply Input | Accepts 4V–72V input; withstands –60V reverse; requires external Zener clamp for adjustable overvoltage protection. |
| OUT | Output Voltage Sense | Senses load-side voltage; internal clamp limits GATE–OUT to 17V; bypass with ≥22µF capacitor. |
| SNS | Current Sense Input | Monitors voltage drop across external sense resistor; controls current limit at 50mV/62mV thresholds. |
| DRN | MOSFET Drain–Source Sense | Tracks VDS of external N-MOSFET; current through RDRN scales with VDS for stress-based timing. |
| GATE | N-MOSFET Gate Driver | Drives external MOSFET gate; regulated to VOUT + 11.5V; limited to VVCC + 13.5V (no internal GND clamp). |
| ON | Enable / UVLO / Shutdown Control | 1.05V threshold with 45mV hysteresis; pulls device into 6µA shutdown when below threshold. |
| FLT | Open-Drain Fault Output | Pulls low when TMR reaches 1.215V; indicates latched-off state; sinks up to 3mA. |
| TMR | Fault Timer Integration Node | Capacitor-connected node; current sourced/sunk based on MOSFET stress; triggers FLT and GATE turn-off. |
| SEL | Gate Clamp Selection (No-Connect) | Must be tied to GND for LTC4380-3 variants - internal clamp disabled; functionally inactive in this part. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Overvoltage Clamping | Clamp voltage set externally via Zener diode on VCC - enables precise output limiting from 18V to 86V. |
| MOSFET Stress-Accelerated Timing | TMR current scales with VDS × ID, shortening fault timeout under high-power dissipation to protect SOA. |
| Latchoff Fault Response | No auto-retry - ensures persistent fault isolation until explicit reset via ON pin or power cycle. |
| Reverse Input Robustness | Withstands –60V on VCC without damage - eliminates need for upstream reverse-polarity protection diodes. |
| Ultra-Low Quiescent Power | 8µA operating current and 6µA shutdown - suitable for always-on telematics, ECU keep-alive, and ADAS modules. |
Applications
| Automotive Load Dump Protection | Reverse Battery Protection |
|---|---|
|
Use Scenario: 12V/24V vehicle electrical system subjected to ISO 16750-2 load dump transients up to 120V for 400ms. IC Role / Device Role / Timing Role: Surge stopper controlling external N-MOSFET; clamps output to safe level (e.g., 27V) by regulating GATE voltage using external Zener. Use Value: Prevents downstream DC/DC converters and microcontrollers from overvoltage damage while maintaining <8µA standby draw. |
Use Scenario: Infotainment head unit powered directly from vehicle battery with risk of accidental reverse battery connection. IC Role / Device Role / Timing Role: High-side switch controller enabling reverse polarity blocking via back-to-back N-MOSFET configuration. Use Value: Eliminates Schottky diode forward drop and heat generation; supports –60V reverse input without latch-up or degradation. |
| Industrial Power Sequencing | High-Side Hot-Swap Controller |
|
Use Scenario: Programmable logic controller (PLC) module requiring controlled power-up of multiple sub-rails after main supply stabilization. IC Role / Device Role / Timing Role: Enable-controlled high-side switch with precise UVLO (1.05V ON threshold) and soft-start via GATE slew rate control. Use Value: Ensures clean power sequencing with 5ms turn-on delay and inrush current limiting via IGATE(UP) = 20µA. |
Use Scenario: Server backplane card insertion into live midplane with hot-swap requirements per IEEE 1101.10. IC Role / Device Role / Timing Role: Fault-protected high-side switch with current limiting (50mV sense) and fast overcurrent turn-off (<4µs propagation). Use Value: Limits inrush and fault currents to safe levels while providing FLT flag for system-level fault logging and recovery. |
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#PBF | Fixed 31.5V/50V internal gate clamp (SEL-selectable); latchoff fault behavior. | Requires no external Zener; simpler layout but less flexible clamping voltage. | Choose for cost-sensitive 12V/24V systems where 27V/45V output clamping is sufficient and design reuse is prioritized. |
| LTC4380HMS-4#PBF | Same adjustable gate clamp architecture; auto-retry (cool-down) fault behavior instead of latchoff. | Self-recovering after transient faults; unsuitable where persistent fault isolation is required. | Prefer for non-safety-critical systems needing automatic recovery after brief overloads, e.g., auxiliary power modules. |
Compared with LTC4380HMS-1#PBF, LTC4380HMS-3#PBF trades internal clamp simplicity for precise, wide-range output voltage control via external Zener - essential when clamping must match specific downstream IC tolerances. Versus LTC4380HMS-4#PBF, its latchoff behavior provides deterministic fault containment, critical in safety-aware automotive domains where unattended retries are prohibited.
Availability
LTC4380HMS-3#PBF is available at Aetrix Electronics and suitable for automotive load dump protection, reverse battery protection, and industrial high-side switching applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC4380HMS-3#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-quiescent-current surge protection ICs designed specifically for automotive and harsh-environment power rail conditioning - emphasizing latchoff safety, reverse polarity resilience, and MOSFET SOA optimization.
FAQ
What is the maximum input voltage the LTC4380HMS-3#PBF can handle?
The LTC4380HMS-3#PBF supports an input voltage range of 4V to 72V on the VCC pin under normal operation. It withstands reverse input down to –60V. For input surges exceeding 72V (e.g., automotive load dump), external protection - such as a Zener diode clamp on VCC - is required to keep the pin within its absolute maximum rating of 80V. The LTC4380HMS-3#PBF itself does not regulate above 72V; clamping is achieved via the external MOSFET gate drive control loop.
How does the LTC4380HMS-3#PBF implement adjustable overvoltage clamping?
The LTC4380HMS-3#PBF has no internal gate-to-GND clamp. Instead, it regulates GATE to VOUT + 11.5V, with a hard limit of VVCC + 13.5V. To set a precise output clamp voltage, a Zener diode is placed between VCC and GND - thereby fixing VVCC, which in turn fixes the maximum GATE voltage and thus the output clamping level (VOUT ≈ VGATE – VTH(MOSFET)). This architecture allows clamping from ~18V to 86V depending on Zener selection. The LTC4380HMS-3#PBF relies entirely on this external method.
What fault behavior does the LTC4380HMS-3#PBF use, and how is it reset?
The LTC4380HMS-3#PBF uses latchoff fault behavior: upon TMR reaching 1.215V, the GATE pin is turned off and FLT pulls low, and the device remains latched in this state until explicitly reset. Reset is accomplished either by momentarily pulling the ON pin below 1.05V for ≥100µs, or by cycling power. Unlike auto-retry versions (e.g., LTC4380HMS-4#PBF), the LTC4380HMS-3#PBF does not self-recover - ensuring persistent fault isolation for safety-critical applications.
Can the LTC4380HMS-3#PBF drive back-to-back N-MOSFETs for reverse polarity protection?
Yes, the LTC4380HMS-3#PBF supports reverse input protection to –60V and can drive back-to-back N-channel MOSFETs. Its GATE driver is referenced to OUT, enabling source-follower configuration for high-side switching, and its ability to withstand –60V on VCC allows direct connection to reversed battery inputs. When configured with two N-MOSFETs in series (sources tied together), the LTC4380HMS-3#PBF blocks reverse current flow while eliminating the 0.3–0.5V forward drop and thermal loss of a Schottky diode solution.
What is the purpose of the DRN pin on the LTC4380HMS-3#PBF?
The DRN pin on the LTC4380HMS-3#PBF senses the drain-to-source voltage (VDS) of the external N-MOSFET by tracking the OUT node and sourcing a current proportional to VDS through an external resistor (RDRN). This current, combined with the SNS–OUT current (proportional to ID), forms the TMR pin charging current - making fault timeout inversely proportional to MOSFET power dissipation (VDS × ID). This ensures faster turn-off during high-stress faults, keeping the MOSFET within its Safe Operating Area.
LTC4380HMS-3#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
LTC4380HMS-3#PBF FAQ
1.How can I place an order for LTC4380HMS-3#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4380HMS-3#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 LTC4380HMS-3#PBF reliable?
The price and inventory of LTC4380HMS-3#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC4380HMS-3#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4380HMS-3#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4380HMS-3#PBF?
LTC4380HMS-3#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4380HMS-3#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 LTC4380HMS-3#PBF?
For technical support, including LTC4380HMS-3#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4380HMS-3#PBF requirements.
6.How does Aetrix verify that LTC4380HMS-3#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4380HMS-3#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 LTC4380HMS-3#PBF meets industry standards.
7.What is the process for return or replacement of LTC4380HMS-3#PBF?
All LTC4380HMS-3#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4380HMS-3#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 LTC4380HMS-3#PBF part is unused and in its original packaging.
Return procedure for LTC4380HMS-3#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC4380HMS-3#PBF 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…
