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Analog Devices Inc. LTC4367HMS8-1#PBF
- Part No.:
- LTC4367HMS8-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC4367HMS8-1#PBF.pdf
- Description:
- SUPPLY PROTECTION CONTROLLER
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC4367HMS8-1#PBF from Analog Devices is a high-voltage, precision overvoltage/undervoltage/reverse supply protection controller for back-to-back N-channel MOSFETs. It operates from 2.5V to 60V input, withstands –40V to 100V fault transients, and delivers 500µs fast recovery after UV/OV faults - critical for automotive load-dump and industrial hot-swap applications.
For engineers reviewing the LTC4367HMS8-1#PBF datasheet, LTC4367HMS8-1#PBF pinout, LTC4367HMS8-1#PBF application, or LTC4367HMS8-1#PBF equivalent, this page provides verified package mapping (8-lead MSOP), validated pin functions, confirmed 500µs turn-on delay, real-world MOSFET gate drive behavior (ΔVGATE up to 13.1V), and two rigorously cross-checked alternative parts with documented technical differences.
Technical Context
The LTC4367HMS8-1#PBF integrates dual high-accuracy comparators (0.5V threshold ±25mV hysteresis) for user-adjustable UV/OV windows, a 400kHz charge pump driving GATE relative to VOUT, and reverse-voltage detection that actively clamps GATE to VIN during negative transients. Its internal 60mA fast gate sink and 90µA controlled shutdown discharge ensure robust MOSFET control under fault conditions.
Unlike the standard LTC4367, the "-1" variant replaces the 32ms power-good debounce timer with a 500µs GATE turn-on delay, enabling rapid reconnection after transient faults while maintaining full –40V to 100V input survivability and 70µA operating current. The H-grade temperature range (–40°C to +125°C) confirms suitability for under-hood automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Protection Range | –40V to 100V - survives automotive load dump (+100V) and reverse battery connection (–40V) without external TVS or capacitor |
| GATE Turn-On Delay | 500µs - enables fast system recovery after transient overvoltage/undervoltage events, unlike 32ms delay in non-"-1" variants |
| Operating Voltage Range | 2.5V to 60V - supports wide-input industrial and automotive supplies while consuming only 70µA quiescent current |
| UV/OV Threshold Accuracy | ±2.5% (500mV ±12.5mV) - allows precise window-setting via external resistive dividers with <1nA input leakage |
| Gate Drive Enhancement | Up to 13.1V above VOUT - ensures full enhancement of N-channel MOSFETs even at low VIN (e.g., 2.5V), reducing conduction loss |
| Shutdown Current | 5µA - enables ultra-low-power standby in battery-backed systems without compromising fault response speed |
| Temperature Grade | H-grade (–40°C to +125°C) - qualified for engine compartment and industrial control cabinet deployment |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm footprint, exposed pad (optional ground connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input supply rail | Withstands –40V to 100V; powers internal circuitry when ≥2.5V; referenced for all protection thresholds |
| UV | Undervoltage comparator input | 0.5V falling threshold with 25mV hysteresis; connects to resistive divider to set lower fault limit (e.g., 3.5V) |
| OV | Overvoltage comparator input | 0.5V rising threshold with 25mV hysteresis; connects to resistive divider to set upper fault limit (e.g., 18V) |
| GND | Device ground reference | Common return for internal regulators, comparators, and FAULT output; exposed pad may be tied here |
| GATE | Charge-pump gate drive output | Drives external N-MOSFET gates relative to VOUT; provides up to 13.1V enhancement; sinks 60mA during fast fault shutdown |
| VOUT | Output voltage sense reference | Senses load-side voltage; used as charge-pump return when VOUT > ~5V; enables accurate gate drive referencing |
| FAULT | Open-drain fault indicator | Pulled low on UV/OV fault, SHDN assertion, or VIN < UVLO (1.8V); compatible with 80V-tolerant logic inputs |
| SHDN | Enable/disable control input | Logic-high (>0.75V) enables gate drive; logic-low (<0.4V) initiates controlled MOSFET turn-off and 5µA shutdown mode |
Key Features
| Feature | Design Value |
|---|---|
| Fast 500µs fault recovery | Enables immediate reconnection after brief transients-critical for CAN bus nodes and PLC I/O modules requiring uninterrupted operation |
| No external TVS or input capacitor required | Reduces BOM count and PCB area by eliminating discrete surge suppression components for most 100V-class automotive and industrial designs |
| Reverse VIN protection with active gate clamp | Automatically ties MOSFET gates to negative VIN, blocking reverse current without body-diode conduction in back-to-back configuration |
| Adjustable UV/OV window via resistor dividers | Supports custom supply windows (e.g., 7V–36V for 24V systems) using standard 1% resistors with <1nA input leakage error |
| H-grade temperature qualification | Validated operation from –40°C to +125°C ambient - meets AEC-Q100 stress requirements for under-hood automotive electronics |
Applications
| Automotive Load-Dump Protection | Industrial Hot-Swap Power Entry |
|---|---|
Use Scenario: 12V/24V vehicle electrical system subjected to ISO 7637-2 Pulse 5a (100V, 400ms) load dump transients. IC Role / Device Role / Timing Role: LTC4367HMS8-1#PBF monitors VIN and disables back-to-back N-MOSFETs within 1µs of overvoltage detection, then recovers in 500µs once voltage returns to safe window. Use Value: Prevents damage to downstream ECUs, infotainment, and ADAS modules without adding TVS diodes or derating MOSFETs. |
Use Scenario: Programmable logic controller (PLC) backplane accepting hot-pluggable I/O modules with varying supply sources. IC Role / Device Role / Timing Role: LTC4367HMS8-1#PBF acts as intelligent power switch, blocking reverse polarity insertion and isolating modules during undervoltage brownouts. Use Value: Eliminates manual power cycling; enables true plug-and-play field maintenance with no risk of bus corruption or module damage. |
| Portable Test Equipment Power Input | Network Equipment DC Power Feed |
Use Scenario: Handheld oscilloscope or multimeter powered by AC adapter or rechargeable battery, subject to polarity reversal and adapter mismatch. IC Role / Device Role / Timing Role: LTC4367HMS8-1#PBF enforces strict 3.5V–18V input window and blocks –40V reverse connections, ensuring safe operation across multiple power sources. Use Value: Enables single-board design for multi-source power without mechanical polarity keys or separate battery management ICs. |
Use Scenario: Ethernet switch or PoE injector receiving DC input from centralized plant power with potential for wiring errors or aging supply drift. IC Role / Device Role / Timing Role: LTC4367HMS8-1#PBF guards against sustained overvoltage (e.g., 72V due to regulator failure) and undervoltage brownout (e.g., <5V from cable drop). Use Value: Prevents catastrophic latch-up in PHYs and MAC controllers; maintains network uptime during upstream power anomalies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4367IMS8-1#PBF | I-grade (–40°C to +85°C) vs H-grade; identical electrical specs and pinout | Not qualified for extended high-temp environments (e.g., engine bay, sealed industrial enclosures) | Select when ambient operating temperature remains ≤85°C and cost optimization is prioritized |
| TPS26631PWPR | Integrated 60V eFuse with current limiting; no adjustable UV/OV thresholds; fixed 3.5ms fault response | Lacks programmable voltage window and reverse-voltage blocking; requires external components for –40V tolerance | Choose only if precise voltage windowing and reverse protection are unnecessary and current-limiting is mandatory |
Compared with LTC4367IMS8-1#PBF, the LTC4367HMS8-1#PBF adds guaranteed operation up to +125°C - essential for under-hood automotive use. Compared with TPS26631PWPR, the LTC4367HMS8-1#PBF offers fully adjustable UV/OV thresholds, true reverse-voltage blocking, and faster 500µs recovery, but requires external MOSFETs.
Availability
LTC4367HMS8-1#PBF is available at Aetrix Electronics and suitable for automotive load-dump protection, industrial hot-swap power entry, and portable test equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC4367HMS8-1#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving aerospace, automotive, industrial, and communications markets.
The LTC4367 family was designed specifically for high-reliability DC input protection in harsh environments - delivering precise voltage windowing, reverse polarity blocking, and fast fault recovery without external surge components.
FAQ
What is the key functional difference between LTC4367HMS8-1#PBF and LTC4367HMS8#PBF?
The LTC4367HMS8-1#PBF features a 500µs GATE turn-on delay after UV/OV fault clearance, whereas the LTC4367HMS8#PBF uses a 32ms delay. This enables rapid reconnection in time-critical systems like automotive ECUs and industrial PLCs where prolonged power interruption is unacceptable. Both share identical H-grade temperature rating, protection range, and pinout.
Does LTC4367HMS8-1#PBF require external TVS diodes for 100V load dump compliance?
No. The LTC4367HMS8-1#PBF withstands –40V to 100V continuously on VIN without external TVS diodes or input capacitors in most applications. Its internal architecture handles ISO 7637-2 Pulse 5a transients directly, provided external N-channel MOSFETs (e.g., Si7942) are rated for ≥100V VDS and proper layout practices are followed.
How does LTC4367HMS8-1#PBF implement reverse supply protection?
The LTC4367HMS8-1#PBF detects negative VIN via an internal comparator and immediately connects the GATE pin to VIN through an internal switch. This pulls both gates of the back-to-back N-MOSFETs to the negative rail, keeping the high-side MOSFET off while its body diode blocks reverse current - achieving true bidirectional isolation without P-channel devices or diodes.
Can LTC4367HMS8-1#PBF operate with input voltages below 2.5V?
No. The LTC4367HMS8-1#PBF has a minimum operating voltage of 2.5V. Below this, internal circuitry (including comparators and charge pump) is not guaranteed to function. Its undervoltage lockout (UVLO) activates at 1.8V (rising), but normal regulation and protection require VIN ≥2.5V per the datasheet's operating range specification.
What is the maximum gate capacitance supported by LTC4367HMS8-1#PBF's charge pump?
The LTC4367HMS8-1#PBF's charge pump is characterized with CGATE = 2.2nF in timing specifications (e.g., tD(ON), tGATE(SLOW)). While not explicitly rated for higher values, design guidance recommends limiting total gate capacitance to ≤4.7nF to maintain specified 500µs turn-on delay and avoid excessive turn-on time degradation in production systems.
LTC4367HMS8-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 70µA
- Voltage - Supply:
- 2.5V ~ 60V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
LTC4367HMS8-1#PBF FAQ
1.How can I place an order for LTC4367HMS8-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4367HMS8-1#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 LTC4367HMS8-1#PBF reliable?
The price and inventory of LTC4367HMS8-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4367HMS8-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4367HMS8-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4367HMS8-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4367HMS8-1#PBF?
LTC4367HMS8-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4367HMS8-1#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 LTC4367HMS8-1#PBF?
For technical support, including LTC4367HMS8-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4367HMS8-1#PBF requirements.
6.How does Aetrix verify that LTC4367HMS8-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4367HMS8-1#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 LTC4367HMS8-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4367HMS8-1#PBF?
All LTC4367HMS8-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4367HMS8-1#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 LTC4367HMS8-1#PBF part is unused and in its original packaging.
Return procedure for LTC4367HMS8-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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