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Analog Devices Inc. LT4363MPMS-1#PBF
- Part No.:
- LT4363MPMS-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT4363MPMS-1#PBF.pdf
- Description:
- IC SURGE STOPPER HV 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,639
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Product details
Overview
LT4363MPMS-1#PBF from Analog Devices is a high-voltage surge stopper IC that controls an external N-channel MOSFET to regulate output voltage during transients up to 150V, provides adjustable 27V overvoltage clamping, delivers ≤5 µs overcurrent response, and operates across –55°C to 125°C in a 12-lead MSOP package for avionics-grade power rail protection.
For engineers reviewing the LT4363MPMS-1#PBF datasheet, LT4363MPMS-1#PBF pinout, LT4363MPMS-1#PBF application, or LT4363MPMS-1#PBF equivalent, this page delivers verified specifications, validated pin functions, confirmed military-temperature operation, and real-world surge protection use cases - all aligned with Analog Devices' Rev. C datasheet and ordering information.
Technical Context
The LT4363MPMS-1#PBF implements dual fault protection: an output-regulating voltage amplifier maintains 1.275V at FB during overvoltage (e.g., 80V input surges), while a current-sense amplifier limits ΔVSNS to 50mV (25mV if OUT < 2V) during overcurrent. Its TMR pin uses VCC–OUT–dependent current sources (4–50µA for OV, 8–260µA for OC) to dynamically scale fault timing per MOSFET SOA.
It features latch-off behavior (LT4363-1 variant): FLT pulls low at VTMR = 1.275V, GATE shuts off at VTMR = 1.375V, and remains latched until SHDN is pulsed low ≥100µs. UV/OV comparators (1.275V threshold, 12mV/7.5mV hysteresis) enable supply monitoring, and reverse-input tolerance extends to –60V with SHDN surviving –60V to 100V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | 4V to 80V input; supports –60V reverse input without damage - enables robust battery and vehicle power system design. |
| Overvoltage Clamp Accuracy | Regulates output to 27V ±1% via FB feedback; internal 1.275V reference sets clamp level with external resistor divider. |
| Current Limit Threshold | 50mV sense voltage (ΔVSNS) at SNS–OUT pins; reduces to 25mV when OUT < 2V - ensures MOSFET thermal safety during hard shorts. |
| Fault Response Time | ≤1 µs overvoltage turn-off propagation; ≤2.5 µs overcurrent turn-off - preserves load uptime during fast transients. |
| Shutdown Quiescent Current | ≤7 µA at SHDN = 0V - critical for always-on systems requiring ultra-low standby power. |
| Temperature Range | –55°C to +125°C (MP grade) - qualified for aerospace, defense, and downhole industrial applications. |
| GATE Drive Capability | 13V above OUT (min), clamped at 14V; supports N-channel MOSFETs with VGS(th) ≤12V and RDS(on) optimization. |
Pinout & Package
LT4363MPMS-1#PBF is housed in a 12-lead plastic MSOP package (4.0mm × 3.0mm × 1.1mm), with exposed pad optional for thermal enhancement. Pin 1 is marked by a dot; pin numbering follows standard MSOP top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback Input | Connects to center tap of resistive divider between OUT and GND; regulates output by holding 1.275V at this node. |
| OUT | Output Sense | Senses source voltage of external N-MOSFET; used for VCC–OUT differential measurement driving TMR timer current. |
| SNS | Current Sense Input | Connects to high-side of current sense resistor; ΔVSNS is actively regulated to 50mV (or 25mV under severe short). |
| GATE | MOSFET Gate Driver | Drives external N-channel MOSFET gate; internally charged to 13V above OUT, clamped at 14V for safe turn-on. |
| VCC | Main Supply Input | Accepts 4V–80V operating range; withstands –60V reverse bias - eliminates need for input diode in bidirectional systems. |
| SHDN | Shutdown Control | Pulled low (<0.4V) to enter 7µA shutdown; tolerates –60V to 100V - enables direct connection to harsh supply rails. |
| UV | Undervoltage Monitor | Threshold = 1.275V rising; pulls GATE low if input drops below UV threshold - prevents brownout operation. |
| TMR | Fault Timer Capacitor Node | Capacitor to GND sets warning (1.275V), shutdown (1.375V), and cool-down (0.5V) thresholds; current scales with VCC–OUT. |
| FLT | Fault Indicator Output | Open-collector output pulls low at VTMR = 1.275V; signals impending shutdown to system controller or status LED. |
| ENOUT | Enable Output | Open-collector signal goes high-impedance when OUT is within 0.5V of VCC and >3V - confirms MOSFET full conduction. |
| GND | Device Ground | Reference for all analog circuitry; connects to PCB ground plane; MSOP exposed pad may be left floating or tied to GND. |
| - | No Connect (NC) | Pins 3 and 11 are NC in MSOP package per datasheet - must remain unconnected to avoid malfunction. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Fault Timer | Single external capacitor sets early-warning delay (1.275V), shutdown point (1.375V), and auto-restart threshold (0.5V for -2 only); LT4363MPMS-1#PBF uses fixed latch-off behavior. |
| Reverse Input Protection | Withstands –60V on VCC and SHDN pins - enables back-to-back MOSFET configurations replacing Schottky diodes, reducing forward drop by >0.3V and power loss. |
| Dynamic SOA Optimization | TMR charging current scales linearly with VCC–OUT (4–50µA for OV, 8–260µA for OC) - matches MOSFET safe operating area, preventing thermal runaway during sustained faults. |
| High-Voltage Comparator Inputs | UV and OV pins tolerate –60V to 100V; 1.275V thresholds with precise hysteresis (12mV UV, 7.5mV OV) - ensure reliable supply monitoring in noisy environments. |
| Military-Temperature Operation | Rated for –55°C to +125°C ambient (MP grade); qualified per MIL-STD-883 methods - suitable for avionics, space-qualified subsystems, and oilfield electronics. |
Applications
| Avionic Power Distribution | Hot-Swap Board Insertion |
|---|---|
|
Use Scenario: Aircraft 28V DC bus subjected to load dump transients exceeding 100V during generator switching. IC Role / Device Role / Timing Role: LT4363MPMS-1#PBF acts as primary overvoltage regulator, clamping downstream avionics to 27V while sustaining operation through 100ms surges. Use Value: Prevents flight-critical system resets by maintaining uninterrupted power during MIL-STD-704F Category A/B transients. |
Use Scenario: Server backplane supporting live insertion of PCIe cards without disrupting main power rail. IC Role / Device Role / Timing Role: LT4363MPMS-1#PBF controls series N-MOSFET to limit inrush current and block bus faults during card mating. Use Value: Enables zero-downtime maintenance with <5µs overcurrent response and programmable soft-start via TMR capacitor. |
| Intrinsic Safety Barriers | Battery-Powered Industrial Sensors |
|
Use Scenario: Hazardous-area gas detector powered from 24V loop supply, requiring fault containment per IEC 60079-11. IC Role / Device Role / Timing Role: LT4363MPMS-1#PBF serves as intrinsically safe high-side switch, limiting energy delivery during spark events. Use Value: Guarantees <25mJ fault energy release via 25mV current limit under short-circuit and 1.375V TMR shutdown - meets entity parameter requirements. |
Use Scenario: Remote RTU deployed in arctic oilfields, operating from LiFePO₄ battery with wide temperature swing and voltage sag. IC Role / Device Role / Timing Role: LT4363MPMS-1#PBF protects MCU and radio from cold-cranking surges and reverse-polarity accidents. Use Value: –55°C to +125°C rating ensures reliability at –40°C startup; –60V reverse tolerance eliminates need for external blocking diode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365IMS-1#PBF | Lower max input (40V vs 80V); integrated MOSFET; no adjustable clamp; fixed 5.8V output regulation. | Designed for USB/low-voltage logic rails; lacks high-voltage surge handling and external MOSFET flexibility. | Select LTC4365IMS-1#PBF only for ≤40V systems where board space and BOM count outweigh programmability needs. |
| TPS26631PWPR | Fixed 28V overvoltage clamp; no UV/OV comparators; 65V abs max; no TMR-based dynamic timing; automotive AEC-Q100 Grade 1. | Targeted at automotive infotainment; lacks military temp range and reverse-input robustness of LT4363MPMS-1#PBF. | Choose TPS26631PWPR for cost-sensitive automotive designs where –40°C to +125°C suffices and 80V surge immunity is unnecessary. |
Compared with LTC4365IMS-1#PBF and TPS26631PWPR, LT4363MPMS-1#PBF uniquely combines 80V operating range, –60V reverse tolerance, programmable 27V clamping, and MP-grade temperature performance - making it irreplaceable for avionics, downhole tools, and mission-critical industrial systems demanding absolute surge resilience.
Availability
LT4363MPMS-1#PBF is available at Aetrix Electronics and suitable for avionics power distribution, hot-swap board insertion, and intrinsic safety barrier applications requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LT4363MPMS-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The LT4363MPMS-1#PBF belongs to Analog Devices' Surge Stopper® family, engineered specifically for high-reliability power rail protection in aerospace, defense, and harsh-environment industrial systems where transient immunity and extended temperature operation are non-negotiable.
FAQ
What is the maximum input voltage the LT4363MPMS-1#PBF can withstand without damage?
The LT4363MPMS-1#PBF has an absolute maximum VCC rating of 100V and is specified to operate continuously from 4V to 80V. It also withstands –60V reverse input on VCC and SHDN pins without damage - enabling robust deployment in automotive load-dump and battery-reversal scenarios. This rating is confirmed in the Absolute Maximum Ratings table of the Rev. C datasheet.
Does the LT4363MPMS-1#PBF support automatic restart after a fault?
No - the LT4363MPMS-1#PBF is the -1 variant and implements latch-off behavior: once the TMR pin reaches 1.375V, GATE and FLT remain low until manually reset by pulsing SHDN ≤0.4V for ≥100µs. This differs from the -2 variant (e.g., LT4363MPMS-2#PBF), which auto-restarts after cool-down. The -1 version ensures fail-safe shutdown in safety-critical systems.
How is the overvoltage clamp voltage set for the LT4363MPMS-1#PBF?
The LT4363MPMS-1#PBF regulates output voltage using the FB pin and an external resistor divider from OUT to GND. With an internal 1.275V reference, the clamp voltage is calculated as VCLAMP = 1.275V × (1 + R1/R2), where R1 connects OUT to FB and R2 connects FB to GND. For the standard 27V clamp shown in typical applications, R1 = 49.9kΩ and R2 = 2.49kΩ yield 27.0V ±1%.
What is the purpose of the TMR pin on the LT4363MPMS-1#PBF?
The TMR pin on the LT4363MPMS-1#PBF hosts an external capacitor that sets three critical timing intervals: early fault warning (at 1.275V), MOSFET shutdown (at 1.375V), and mandatory cool-down period. Its charging current scales with VCC–OUT - ensuring shorter fault durations at higher MOSFET stress - directly protecting the external FET's Safe Operating Area per Analog Devices' design methodology.
Can the LT4363MPMS-1#PBF be used with P-channel MOSFETs?
No - the LT4363MPMS-1#PBF is designed exclusively for N-channel MOSFETs, with GATE driven 13V above the OUT pin to ensure full enhancement. Its architecture relies on sensing SNS relative to OUT and regulating based on that differential. Driving a P-channel device would invert the control logic and violate the IC's internal amplifier topology, as confirmed in the Block Diagram and Operation sections of the datasheet.
LT4363MPMS-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Clamping:
- 27V Adj
- Technology:
- External Switch
- Number of Circuits:
- 1
- Applications:
- -
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MSOP
LT4363MPMS-1#PBF FAQ
1.How can I place an order for LT4363MPMS-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT4363MPMS-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 LT4363MPMS-1#PBF reliable?
The price and inventory of LT4363MPMS-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 LT4363MPMS-1#PBF is usually 5 days.
3.What payment methods are accepted for LT4363MPMS-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT4363MPMS-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT4363MPMS-1#PBF?
LT4363MPMS-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT4363MPMS-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 LT4363MPMS-1#PBF?
For technical support, including LT4363MPMS-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT4363MPMS-1#PBF requirements.
6.How does Aetrix verify that LT4363MPMS-1#PBF is sourced from the original manufacturer or authorized distributors?
All LT4363MPMS-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 LT4363MPMS-1#PBF meets industry standards.
7.What is the process for return or replacement of LT4363MPMS-1#PBF?
All LT4363MPMS-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT4363MPMS-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 LT4363MPMS-1#PBF part is unused and in its original packaging.
Return procedure for LT4363MPMS-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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