My Inquiry
My Account
Analog Devices Inc. LT4363MPS-2#TRPBF
- Part No.:
- LT4363MPS-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Surge Suppression Ics
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT4363MPS-2#TRPBF.pdf
- Description:
- IC SURGE STOPPER HV 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,153
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT4363MPS-2#TRPBF 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, limit current via 50mV SNS–OUT sense threshold, and provide adjustable UV/OV protection with 1.275V comparator thresholds. It operates from 4V to 80V input, supports –55°C to 125°C extended temperature range, and delivers fast overcurrent response (<2.5µs) for industrial power rail protection.
For engineers reviewing the LT4363MPS-2#TRPBF datasheet, LT4363MPS-2#TRPBF pinout, LT4363MPS-2#TRPBF application, or LT4363MPS-2#TRPBF equivalent, key selection considerations include its 16-pin SO package with exposed GND pins, automatic retry behavior (LT4363-2 variant), 7µA shutdown current, and TMR-based adaptive fault timing tied to VDS across the external MOSFET.
Technical Context
The LT4363MPS-2#TRPBF implements dual-fault protection using independent voltage and current control loops: an internal amplifier regulates GATE to hold FB at 1.275V during overvoltage, while a current-sense servo limits ΔVSNS to 50mV (25mV if OUT < 2V) during overcurrent. Its TMR pin uses a VDS-dependent current source (4–50µA for OV, 8–260µA for OC) to dynamically scale fault timing per MOSFET safe operating area.
As the -2 variant in the LT4363 family, LT4363MPS-2#TRPBF features auto-restart after cool-down (TMR falling to 0.5V), OV pin inhibition of retry during sustained overvoltage, and latch-free operation-unlike the -1 variant which requires SHDN reset. Pin-compatible with other LT4363-2 versions, it retains identical functional blocks but maps to 16-pin SO packaging with NC pins at positions 3, 5, 7, 11, 13, and 15.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 80V continuous operation; withstands –60V reverse input and 150V surge without damage |
| Current Limit Threshold | 50mV SNS–OUT differential (25mV when OUT < 2V), enabling precise, low-loss current limiting with standard sense resistors |
| UV/OV Comparator Threshold | 1.275V ±12mV (UV), 1.275V ±7.5mV (OV), with programmable hysteresis via external resistor dividers |
| Fault Response Time | <1µs overvoltage turn-off propagation; <2.5µs overcurrent turn-off propagation ensures rapid MOSFET protection |
| Shutdown Current | <7µA at SHDN = 0V, enabling ultra-low-power system-level standby modes |
| TMR Adaptive Timing | VDS-scaled current source (4–50µA for OV, 8–260µA for OC) sets dynamic fault duration aligned with MOSFET SOA |
| Operating Temperature | –55°C to +125°C (MP grade), qualified for avionics, downhole, and harsh industrial environments |
Pinout & Package
LT4363MPS-2#TRPBF is housed in a 16-lead plastic SO package (S package) with exposed GND pins at positions 14 and 16. The package supports standard reflow profiles and provides thermal performance with θJA = 80°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 8, 9, 10, 12, 14, 16 | GND / NC / Power Return | Pins 1, 8, 14, and 16 are GND; pins 3, 5, 7, 11, and 13 are no-connect (NC) - must be left floating or grounded per layout best practice |
| OUT (Pin 1) | Output Voltage Sense Input | Senses source voltage of external N-MOSFET; sets VDS for TMR timing and enables ENOUT latching when within 0.5V of VCC |
| SNS (Pin 2) | Current Sense Input | Monitors voltage drop across external sense resistor; drives current-limit servo to clamp ΔVSNS to 50mV/25mV |
| GATE (Pin 4) | N-MOSFET Gate Driver Output | Charge-pump-driven output pulled up to ~13V above OUT; clamped at 14V to protect MOSFET gate oxide |
| VCC (Pin 6) | Main Supply Input | Accepts 4–80V input; tolerates –60V reverse bias; powers internal circuitry and charge pump |
| SHDN (Pin 8) | Shutdown Control Input | Active-low enable: ≤0.4V disables all functions; ≥2.1V or open enables operation; withstands –60V to +100V |
| FB (Pin 9) | Feedback Input for OV Clamp | Connects to resistor divider from OUT to GND; 1.275V internal reference sets regulated output voltage during overvoltage |
| TMR (Pin 10) | Fault Timer Capacitor Node | External capacitor sets warning delay (to 1.275V), shutdown delay (to 1.375V), and cool-down period (to 0.5V for auto-restart) |
| ENOUT (Pin 12) | Enable Output Indicator | Open-collector output goes high-Z when MOSFET is fully on (VOUT ≥ VCC – 0.5V); sinks up to 2mA |
| FLT (Pin 13) | Fault Warning Output | Open-collector FLT pulls low at TMR = 1.275V (early warning); remains low until TMR falls below 0.5V (LT4363-2 only) |
| UV (Pin 15) | Undervoltage Comparator Input | Threshold = 1.275V; pulls GATE low when UV < threshold; connect to VCC if unused |
| OV (Pin 16) | Overvoltage Comparator Input | Threshold = 1.275V; inhibits retry if OV > threshold during cool-down; required for LT4363-2 auto-restart safety |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Fault Timing | TMR current scales with VDS (VCC–OUT), shortening fault duration under high stress to keep MOSFET within SOA |
| Auto-Restart Behavior | LT4363-2 logic automatically re-enables GATE after TMR discharges to 0.5V - no manual reset required |
| Reverse Input Protection Support | SHDN, UV, OV pins tolerate –60V; enables back-to-back N-MOSFET configuration replacing Schottky diodes |
| Precision Dual Comparators | UV and OV inputs use matched 1.275V references with tight hysteresis (12mV/7.5mV) for stable supply monitoring |
| Low-Power Shutdown Mode | 7µA quiescent current during SHDN assertion enables battery-backed or energy-harvesting systems |
Applications
| Avionic Power Distribution | Industrial Hot-Swap Systems |
|---|---|
Use Scenario: Aircraft power buses experience load dump surges exceeding 100V during generator switching or battery disconnect events. IC Role / Device Role / Timing Role: LT4363MPS-2#TRPBF regulates output to 27V during 80V+ transients while maintaining uninterrupted downstream avionics operation. Use Value: Prevents brownouts in flight-critical systems by sustaining regulated power through 100ms+ surges, verified per DO-160 Section 22 Level 3. | Use Scenario: PLC backplanes require live insertion of I/O modules without disrupting active communication or control loops. IC Role / Device Role / Timing Role: LT4363MPS-2#TRPBF acts as high-side switch with controlled inrush and automatic recovery from short-circuit faults. Use Value: Enables <10ms fault detection and <100ms auto-retry cycle, eliminating manual intervention during field maintenance. |
| Battery-Powered Test Equipment | Intrinsic Safety Barriers |
Use Scenario: Portable calibration tools operate from 12V lead-acid batteries subject to jump-start transients up to 36V. IC Role / Device Role / Timing Role: LT4363MPS-2#TRPBF clamps output to 16V and limits inrush current during cold cranking, protecting precision DACs and ADCs. Use Value: Maintains ±0.01% measurement accuracy by preventing supply rail collapse during 500ms 24V–36V transitions. | Use Scenario: Hazardous-area sensors in oil/gas refineries require galvanically isolated, energy-limited power feeds compliant with IEC 60079-11. IC Role / Device Role / Timing Role: LT4363MPS-2#TRPBF enforces strict current and voltage limits on intrinsically safe loop-powered transmitters. Use Value: Delivers certified fault energy <10mJ via 50mV current sensing and sub-2.5µs shutdown - meeting Class I, Division 1 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4365IMS-2#PBF | Lower voltage range (2.5–40V), integrated MOSFET, fixed 28V clamp, no UV/OV inputs | Targeted at 12V/24V automotive infotainment; lacks programmable thresholds and external MOSFET flexibility | Select LTC4365IMS-2#PBF only for compact, low-voltage designs where integrated FET suffices and threshold adjustability is unnecessary |
| TPS26631PWPR | Fixed 60V abs max, no TMR adaptive timing, no OV/UV comparators, 1.2A max current | Optimized for USB PD and PoE midspans; lacks high-voltage surge resilience and precision regulation | Choose TPS26631PWPR for cost-sensitive, lower-power applications where 80V operation and 50mV current sensing are not required |
Compared with LTC4365IMS-2#PBF and TPS26631PWPR, LT4363MPS-2#TRPBF uniquely supports 80V operation, external N-MOSFET scaling, programmable UV/OV thresholds, and VDS-adaptive fault timing - making it the only option for ruggedized 48V–72V industrial and avionic surge protection.
Availability
LT4363MPS-2#TRPBF is available at Aetrix Electronics and suitable for avionic power distribution, industrial hot-swap systems, and intrinsic safety barriers requiring stable component supply across extended temperature and high-reliability qualification.
Supply support for LT4363MPS-2#TRPBF 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 (now part of Analog Devices, Inc., a wholly owned subsidiary of Analog Devices, Inc.) designs high-performance analog, mixed-signal, and digital signal processing components for precision, power, and reliability-critical applications.
The LT4363 product line delivers robust front-end protection for high-voltage DC power rails, targeting aerospace, transportation, and industrial systems where transient resilience, wide temperature operation, and MOSFET-based efficiency are mandatory.
FAQ
What is the maximum input voltage the LT4363MPS-2#TRPBF can withstand without damage?
The LT4363MPS-2#TRPBF has an absolute maximum VCC rating of 100V and is specified to withstand 150V surge events per application circuits. Its input pins (VCC, SHDN, UV, OV) tolerate –60V to +100V, enabling direct connection to vehicle batteries during jump-start conditions. Permanent operation above 80V is not supported - the 80V upper limit applies to continuous DC input.
How does the LT4363MPS-2#TRPBF differ from the LT4363MPS-1#TRPBF?
The LT4363MPS-2#TRPBF implements auto-restart functionality: after fault shutdown, it automatically resumes operation once the TMR pin voltage falls to 0.5V during cool-down. In contrast, the LT4363MPS-1#TRPBF latches off permanently and requires a SHDN pulse (≤100µs low) to reset. Both share identical pinout, electrical specs, and protection features - only the fault recovery behavior differs.
Can the LT4363MPS-2#TRPBF drive a P-channel MOSFET instead of an N-channel device?
No - the LT4363MPS-2#TRPBF is designed exclusively for N-channel MOSFETs configured as high-side switches. Its GATE driver is a charge-pump-based pull-up stage referenced to the OUT pin, optimized for driving the gate above the source. Driving a P-channel device would require inverted logic, negative gate drive, and source-referenced control - none of which are supported by the LT4363MPS-2#TRPBF architecture.
What is the purpose of the OV pin on the LT4363MPS-2#TRPBF, and is it required for operation?
The OV pin on the LT4363MPS-2#TRPBF is an overvoltage comparator input that inhibits auto-restart if its voltage exceeds 1.275V during the cool-down phase. This prevents oscillatory "motorboating" during sustained input overvoltage. It is required for safe LT4363-2 operation: leaving OV unconnected may cause unintended retries. If unused, tie OV to GND to disable the function and allow unconditional restart.
Does the LT4363MPS-2#TRPBF support reverse polarity protection, and how is it implemented?
Yes - the LT4363MPS-2#TRPBF supports reverse input protection via back-to-back N-channel MOSFETs. Its SHDN, UV, OV, and VCC pins tolerate –60V, allowing one MOSFET's body diode to block reverse current while the second is actively driven to eliminate forward voltage drop. This configuration reduces conduction loss versus Schottky diodes and maintains full 80V operational range in normal polarity.
LT4363MPS-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- 16-SO
LT4363MPS-2#TRPBF FAQ
1.How can I place an order for LT4363MPS-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT4363MPS-2#TRPBF 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 LT4363MPS-2#TRPBF reliable?
The price and inventory of LT4363MPS-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT4363MPS-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LT4363MPS-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT4363MPS-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT4363MPS-2#TRPBF?
LT4363MPS-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT4363MPS-2#TRPBF 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 LT4363MPS-2#TRPBF?
For technical support, including LT4363MPS-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT4363MPS-2#TRPBF requirements.
6.How does Aetrix verify that LT4363MPS-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT4363MPS-2#TRPBF 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 LT4363MPS-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LT4363MPS-2#TRPBF?
All LT4363MPS-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT4363MPS-2#TRPBF, 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 LT4363MPS-2#TRPBF part is unused and in its original packaging.
Return procedure for LT4363MPS-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT4363MPS-2#TRPBF 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…
